Variable-Area Flowmeter Device Description - Adinco bv

www.heinrichs-mt.nl 

Variable-Area Flowmeter 

BGN 

Device Description

Heinrichs Messtechnik 

Device Description Variable Area Flowmeter BGN 

Contents 

1 IDENTIFICATION ............................................................................................................................................................. 4 

1.1 Supplier/manufacturer .............................................................................................................................4 

1.2 Product type ..............................................................................................................................................4 

1.3 Product name ............................................................................................................................................4 

1.4 Issue date ...................................................................................................................................................4 

1.5 Version no..................................................................................................................................................4 

2 APPLICATIONS ............................................................................................................................................................... 4 

3 OPERATIONAL MODE AND SYSTEM DESIGN.............................................................................................................. 4 

3.1 Measuring principle..................................................................................................................................4 

3.2 System design ............................................................................................................................................4 

4 INPUT ........................................................................................................................................................................ 4 

4.1 Measured variable ....................................................................................................................................4 

4.2 Measuring range (lower-range and upper-range value)........................................................................4 

4.3 Measuring range table..............................................................................................................................5 

5 OUTPUT ........................................................................................................................................................................ 6 

5.1 Binary output ............................................................................................................................................6 

5.1.1 KEI 1 or KEI 2 limit transducers..........................................................................................................6 

5.1.2 KEM 1 or KEM 2 limit transducers (special version) ..........................................................................6 

5.2 Analog output with the ES magneto-electric transmitter......................................................................6 

5.3 Analog output with the KINAX 3W2 angle-of-rotation transmitter ....................................................6 

6 CHARACTERISTIC VALUES........................................................................................................................................... 6 

6.1 Measuring accuracy..................................................................................................................................6 

6.1.1 Reference conditions ............................................................................................................................6 

6.1.2 Measured error......................................................................................................................................6 

6.1.3 Repeatability.........................................................................................................................................6 

6.2 Influence of ambient temperature ...........................................................................................................6 

6.3 Influence of fluid temperature .................................................................................................................6 

7 CONDITIONS OF USE ..................................................................................................................................................... 6 

7.1 Mounting requirements............................................................................................................................6 

7.1.1 Mounting/start-up .................................................................................................................................7 

7.1.2 Device settings......................................................................................................................................7 

7.1.3 Adjusting the limit transducer ..............................................................................................................7 

7.1.4 Operation in hazardous areas................................................................................................................8 

7.2 Ambient conditions ...................................................................................................................................8 

7.2.1 Ambient temperature ranges.................................................................................................................8 

7.2.2 Storage temperature..............................................................................................................................8 

7.2.3 Climatic category..................................................................................................................................8 

7.2.4 Degree of protection .............................................................................................................................8 

7.2.5 Shock resistance/vibration resistance ...................................................................................................8 

7.2.6 Electromagnetic compatibility..............................................................................................................8 

7.3 Fluid conditions.........................................................................................................................................9 

7.3.1 Fluid temperature ranges ......................................................................................................................9 

7.3.2 Diagrams: Max. ambient temperature based on the fluid temperature for the ES ................................9 

7.3.3 Fluid pressure limit.............................................................................................................................10 

7.3.4 Inlet and outlet sections ......................................................................................................................10 

7.3.5 Physical state ......................................................................................................................................10 

7.3.6 Density................................................................................................................................................10 

7.3.7 Viscosity.............................................................................................................................................10 

Page 2 of 28



7.3.8 Pressure (for gas measurement)..........................................................................................................10 

7.3.9 Pressure loss .......................................................................................................................................10 

8 CONSTRUCTION DETAILS........................................................................................................................................... 11 

8.1 Type of construction/dimensions ...........................................................................................................11 

8.1.1 Aluminum indicator housing ..............................................................................................................11 

8.1.2 Dimension drawing for heating connection........................................................................................11 

8.1.3 Indicator housing made of stainless steel............................................................................................12 

8.2 Weight......................................................................................................................................................12 

8.3 Material....................................................................................................................................................13 

8.4 Process connection ..................................................................................................................................13 

8.5 Magnetic filter .........................................................................................................................................13 

8.6 Electrical connection...............................................................................................................................14 

8.6.1 Wiring diagram for ES transmitter (signal output 4-20 mA with HART®).......................................14 

8.6.2 Wiring diagram for ES transmitter with 4-20 mA output and 2 limit transducers..............................14 

8.6.3 Wiring diagram for ES transmitter with 4- 20 mA output, pulse output and limit transducer............15 

8.6.4 Wiring diagram for inductive limit transducers..................................................................................15 

8.6.5 Wiring diagram for KINAX 3W2 transmitter with 4-20 mA output, 2 wires.....................................16 



8.6.8 Wiring diagram for KEM 1 and KEM 2 double-throw microswitches...............................................17 

9 INDICATOR UNIT........................................................................................................................................................... 18 

10 AUXILIARY POWER...................................................................................................................................................... 18 

11 CE MARK ...................................................................................................................................................................... 18 

12 ORDER INFORMATION................................................................................................................................................. 18 

12.1 Available accessories...............................................................................................................................18 

13 STANDARDS AND DIRECTIVES, CERTIFICATES AND APPROVALS........................................................................ 18 

14 REPLACEMENT PARTS................................................................................................................................................ 18 

15 EXPLODED VIEWS........................................................................................................................................................ 19 

15.1 Fitting with measuring element .............................................................................................................19 

15.1.1 BGN-.... Standard version..................................................................................................................19 

15.1.2 BGN-.... with spring stop...................................................................................................................19 

15.1.3 BGN-.... with damping piston.............................................................................................................19 

15.1.4 BGN-.... with damping piston and spring stop ...................................................................................20 

15.1.5 BGN-.... small measuring ranges........................................................................................................20 

15.2 Indicator unit...........................................................................................................................................21 

15.2.1 Complete indicator unit, local with scale............................................................................................21 

15.2.2 Complete indicator unit with 1 SJ 3,5 N limit transducer...................................................................21 

15.2.3 Complete indicator unit with 2 SJ 3,5 N limit transducers .................................................................21 

15.2.4 Complete indicator unit with E2 KINAX Ex transmitter....................................................................22 

15.2.5 Complete indicator unit with E2 KINAX Ex transmitter and 1 SJ 3,5 N limit transducer .................22 

15.2.6 Indicator unit with transmitter type ES Ex HART® ..........................................................................22 

16 EC TYPE EXAMINATION CERTIFICATE ...................................................................................................................... 23 

17 SALES REPRESENTATIVES ........................................................................................................................................ 28 

18 NOTES ...................................................................................................................................................................... 28 

Page 3 of 28



1 Identification 

1.1 Supplier/manufacturer 

Heinrichs Messtechnik GmbH 

Robert-Perthel-Str. 9 ⋅ D-50739 Köln 

Phone +49 (221) 49708 - 0 

Fax +49 (221) 49708 - 92 

Internet: http://www.heinrichs-mt.nl 

E-mail: mailto:info@heinrichs-mt.nl 

1.2 Product type 

Flowmeter in all-metal design based on the float principle 

1.3 Product name 

BGN with subgroups 

BGN-S (stainless steel) 

BGN-P (PTFE) 

BGN-H (Hastelloy) 

1.4 Issue date 

09/07/2003 

1.5 Version no. 

2.0 

File: BGN_GB_02_eng 

2 Applications 

The BGN meter is suitable for flow measurement of liquid or 

gaseous products in pipes. It shows the current flow rate in 

volume or mass per unit in time. 

Applications: flow measurement, dosing, monitoring, 

adjusting and control of liquid and gaseous products. 

The meter’s design makes it ideal for processes under 

difficult and adverse operating conditions. 

The devices are available with additional electrical 

equipment for process monitoring and control. 

3 Operational mode and system 

design 

3.1 Measuring principle 

The measuring element consists of a sharp-edged 

measuring ring (1) and a conical float (2). A medium flows 

from the bottom to the top through the measuring ring, lifting 

the float until the buoyancy force (A) and the weight of the 

float (Gs) establish equilibrium. As the height of the float 

varies, an annular clearance (S) proportional to the flow 

appears between the float and the measuring ring. The 

height of the float in the measuring ring is a measure of the 

flow. The permanent magnet (3) embedded in the float then 

transmits this measure to the scale and the optional 

electronic evaluators through a magnet tracking indicator 

system (4). 

3.2 System design 

The meter consists of a cylindrical fitting pipe with flange 

connections on both sides. For the measuring range from 

5 to 50 l/h, a measuring ring is inserted in the tube in which a 

conical float can move with vertical freedom. For small 

measuring ranges of up to 4–40 l/h, the measuring cell 

consists of a conical measuring tube with cylindrical float. 

The height of the float resulting from the flow rate is 

transmitted in a rotary motion by a built-in permanent 

magnet through a magnet tracking indicator system in a 

rotation to the pointer axis of the analog indicator unit. 

4 Input 

4.1 Measured variable 

Volume flow 

4.2 Measuring range (lower-range and 

upper-range value) 

The lower-range value is considered 10% of the upper-range 

value. Measuring range span: 10-100% 

Smallest measuring range: 0.5-5.0 l/h water 

Largest measuring range: 8.000-80.000 l/h water (stainless 

steel) 

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4.3 Measuring range table 

Nominal 

size (DN) 

Measuring 

range 

Measuring range for 

water at 1000 kg/m3 

Measuring range for air 

at 1.013 bars absolute 

pressure 

Pressure loss 

(mbar) 

Remarks 

15 A 0.5– 5.0 I/h 0.015 – 0.15 m 3 /h 40 1)+2) 

B 1.0 – 10 I/h 0.03 – 0.30 m 3 /h 44 1)+2) 

C 1.6 – 16 I/h 0.045 – 0.48 m 3 /h 40 1)+2) 

D 2.5 – 25 I/h 0.075 – 0.75 m 3 /h 40 +2) 

E 4.0 – 40 I/h 0.13 – 1.3 m 3 /h 40 +2) 

F 5.0 – 50 I/h 0.15 – 1.5 m 3 /h 40 

G 7.0 – 70 I/h 0.2 – 2.1 m 3 /h 40 

H 10 – 100 I/h 0.3 – 3.0 m 3 /h 60 

I 16 – 160 I/h 0.5 – 4.6 m 3 /h 60 

J 25 – 250 I/h 0.7 – 7.0 m 3 /h 60 

K 40 – 400 I/h 1.0 – 11 m 3 /h 70 

L 60 – 600 I/h 1.7 – 17 m 3 /h 80 

M 100 – 1000 I/h 3 – 30 m 3 /h 60 5) 

N 160 - 1600 I/h 4 – 46 m 3 /h 70 5) 

P 250 – 2500 I/h 7 – 70 m 3 /h 100 5) 

25 A 0.5 – 5.0 I/h 0.015 – 0.15 m 3 /h 40 1)+2) 

B 1.0 –10 I/h 0.03 – 0.30 m 3 /h 40 1)+2) 

C 1.6 –16 I/h 0.045 – 0.48 m 3 /h 40 1)+2) 

D 2.5 – 25 I/h 0.075 – 0.75 m 3 /h 40 +2) 

E 4.0 – 40 I/h 0.13 – 1.3 m 3 /h 40 +2) 

F 5.0 – 50 I/h 0.15 – 1.5 m 3 /h 40 

G 7.0 – 70 I/h 0.2 – 2.1 m 3 /h 40 

H 10 – 100 I/h 0.3 – 3.0 m 3 /h 60 

I 16 – 160 I/h 0.5 – 4.6 m 3 /h 60 

J 25 – 250 I/h 0.7 – 7.0 m 3 /h 60 

K 40 – 400 I/h 1.0 – 11 m 3 /h 70 

L 60 – 600 I/h 1.7 – 17 m 3 /h 80 

M 100 – 1000 I/h 3 – 30 m 3 /h 60 

N 160 – 1600 I/h 4 – 46 m 3 /h 70 

P 250 – 2500 I/h 7 – 70 m 3 /h 100 

Q 400 – 4000 I/h 11 – 110 m 3 /h 240 3)+ 4) 

40 P 250 – 2500 I/h 7 – 70 m 3 /h 50 3) 

Q 400 – 4000 I/h 11 – 110 m 3 /h 120 3) 

R 600 – 6000 I/h 17 – 170 m 3 /h 180 3) 

50 Q 400 – 4000 I/h 11 – 110 m 3 /h 80 

R 600 – 6000 I/h 17 – 170 m 3 /h 90 

S 1000 – 10000 I/h 29 – 290 m 3 /h 110 

T 1600 –16000 I/h 46 – 460 m 3 /h 230 

U 2500 – 25000 I/h 70 – 700 m 3 /h 500 3)+ 4) 

80 T 1600 – 16000 I/h 46 – 460 m 3 /h 70 

U 2500 – 25000 I/h 70 – 700 m 3 /h 100 

V 4000 – 40000 I/h 110 – 1100 m 3 /h 350 

100 V 4000 – 40000 I/h 110 – 1100 m 3 /h 120 

W 6000 – 60000 I/h 170 – 1700 m 3 /h 360 

X 8000 – 80000 I/h 240 - 2400 m 3 /h 600 3)+ 4) 

1) for P version (PTFE), float with tantalic collar, cone of borosilicate glass 

measuring range: A 0.7–7.0 l/h, B 1.2–12 l/h, C 2.0–20 l/h 

2) gas throttle in S version for gas measurement included in price (pressure loss 200 mbar) 

3) not available in P version 

4) conversion not possible 

5) only in S and H version, only with smaller sealing strip 

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5 Output 

Various electrical contact makers or transmitters may be 

installed in the indicator unit. 

5.1 Binary output 

Using the segments of the slot-type initiators or the eccentric 

discs of the microswitches, any switching point between 10% 

and 90% of the flow rate can be set. 

5.1.1 KEI 1 or KEI 2 limit transducers 

1 or 2 limit transducers, 

type SJ 3,5N, make Pepperl+Fuchs 

(special switch possible, e.g. SN version) 

Safety class: PTB Nr. 99 ATEX 2219 X 

PTB Nr. 00 ATEX 2048 X 

5.1.2 KEM 1 or KEM 2 limit transducers 

(special version) 

Double-throw microswitches whose switching point is 

activated by a cam plate. 

KEM 1 = 1 Double-throw microswitch 

KEM 2 = 2 Double-throw microswitches 

Maximum make-break capacity: 

230 VAC 50/60Hz 6 A 

24 VDC 0.5 A 

110 VDC 0.2 A 

5.2 Analog output with the ES 

magneto-electric transmitter 

The magneto-electric transmitter is factory-calibrated to the 

scale values upon shipment. The signal output is supplied 

exclusively in a two-wire connection at 4-20 mA. Normally, 

the 4-20 mA signal has the HART® protocol; alternatively it 

can have PROFIBUS PA. 

Additional options: 2 limit values, alternatively 1 limit value 

and 1 pulse output 

The signal output and the limit values can be configured 

using a HART® modem operating on the following 

configuration programs: SensorPort from Bopp & Reuther, 

PDM from Siemens or AMS from Rosemount. Furthermore, 

a HART® hand-held terminal (with DD software) can also be 

used. For more information about configuration, please refer 

to the separate Operating Instructions for the ES. 

Safety class: DMT 00 ATEX 075 / II2G EEx ia IIC T6 

When installing electrical equipment in hazardous areas, 

the conditions and provisions specified in the approval 

docmuments must be followed. 

5.3 Analog output with the KINAX 3W2 

angle-of-rotation transmitter 

The signal output of the angle-of-rotation transmitter is 

factory-calibrated to the scale values. The signal output is 4- 

20 mA in 2-wire connection; or alternatively 0-20 mA in 4- or 

3-wire connection. The signal output of 4 mA corresponds to 

the flow rate scale value of 0 (0 mA for the 0-20 mA version). 

5.6 mA corresponds to 10% of the flow rate scale value 

(2 mA). 20 mA corresponds to 100% of the flow rate scale 

value. 

Use in hazardous areas: 

The angle-of-rotation transmitter is a component approved 

for hazardous areas. When used in hazardous areas, all the 

values and instructions indicated in the certificate of approval 

must be observed. Auxiliary power is fed through an 

approved intrinsically safe circuit of 12-30 V. To prove 

intrinsic safety, only authorized electrical equipment may be 

interconnected. Please take note of the maximum 

permissible ambient temperature of 60°C/75°C for the 

transmitter and the process temperature. 

Safety class: 

PTB 97 ATEX 2271 / II 2G EEx ia IIC T6 

6 Characteristic values 

6.1 Measuring accuracy 

6.1.1 Reference conditions 

Water 20°C 

6.1.2 Measured error 

(for liquids) 

BGN-S/H/P +/- 1.6% of URV for local display 

(URV = upper-range value) 

(for gases) 

BGN-S/H/P +/- 2.0% of URV for local display 

Additional inaccuracy for: 

ES = +/- 0.2% 

KINAX 3W2 = +/- 0.5% 

6.1.3 Repeatability 

+/- 0.5 % of upper-range value 

6.2 Influence of ambient temperature 

1. Without electrical equipment and with limit transducer 

without influence 

2. With KINAX transmitter: 

+/- 0.2 % / 10 K reference temperature 23°C 

3. With ES transmitter: 

+/- 0.5 % / 10 K reference temperature 22°C 

6.3 Influence of fluid temperature 

Deviations in fluid temperature from the temperature 

observed during calibration can result in a proportional 

display fault because of the corresponding change in 

density. Changes in viscosity cause a non-linear display 

fault. 

7 Conditions of use 

The VDI/VDE guidelines 3513, Sheet 3, must be observed. 

The meter is suitable for : 

1) Liquids with sufficient flowability that are free of 

solids, do not bond and do not tend to settle. 

2) Gases with linear flow behavior and an adequate 

inlet pressure. 

7.1 Mounting requirements 

The mounting location must be suitable for a vertical 

direction of flow from the bottom to the top. 

Important: If that is impossible, then the device type BGF 

may be utilized. This device can be used for both horizontal 

and vertical direction of flow. 

Page 6 of 28


The limit values for temperature and air humidity at the 

mounting location must be maintained. Avoid corrosive 

atmospheres. If this cannot be avoided, ventilation must be 

installed. 

Please make sure that there is adequate clearance from 

parts that might cause magnetic interferences such as 

solenoid valves and ferromagnetic components like steel 

brackets/supports. We recommend that the minimum lateral 

distance between two adjacently mounted devices be 

300 mm. The devices can be mounted close together if 

vertically offset by one device length. The minimum lateral 

clearance for interfering steel parts should be 200 mm. In 

case of doubt, check the interference by moving the device 

back and forth in the selected distance by about 200 mm 

and testing whether the pointer position changes. 

Select the mounting location so as to enable a reliable 

reading of the scale values. Please take note as well of the 

space requirement for any possible disassembly of the 

device. As a rule, inlet and outlet sections in front of and 

behind the device are unnecessary if the medium has a 

linear flow profile. Avoid mounting accessories converging 

on one side in front of the device. However, if this is 

indispensable maintain a minimum device length of 250 mm 

as an inlet section. 

The nominal size of the pipes to be connected must 

correspond to that of the meter. Avoid fittings converging on 

one side directly in front of the device. As a rule, install 

valves behind the measuring equipment if there are gases 

involved. 

7.1.1 Mounting/start-up 

The device must be mounted in accordance with the 

direction of flow from the bottom to the top (perpendicularly). 

Please observe the prior reference to the BGF-type device. 


If there is risk of dirt or solid matter penetrating the process 

pipes, flush them beforehand so that these materials do not 

get caught in the device. Ferromagnetic solid matter such 

as spatter can lead to the breakdown of the device. If these 

materials are still present during normal operating 

conditions, mount a magnetic filter (accessory) in front of the 

device. When using liquids, flush to avoid a surge of gas 

bubbles. Slowly increase the supply pressure when using 

gases to prevent pressure surges. Basically, avoid 

activation using solenoid valves to prevent the float from 

shooting upwards. 

7.1.1.1 Gas measurement 

When using gases, slowly let the operating pressure rise. At 

the same time, vary the operating pressure through a setting 

valve so that the float is not knocked around since otherwise 

this would damage the measuring element. 

7.1.2 Device settings 

The measuring equipment is delivered ready for operation 

according to your order specifications. The limit 

transducers are set to the desired values. If you have 

submitted no requirements, the basic setting for 

1 contact device: - Minimum contact switching point at 10% 

of descending flow (damped/closed-circuit principle). 

2 contact devices: Minimum contact switching point at 10% 

of descending flow and maximum contact switching point at 

90% of ascending flow. 

7.1.3 Adjusting the limit transducer 

The contacts are adjustable through the contact position 

indicators located on the scale. Dismantle the indicator 

cover, unfasten the contact position indicators, set to the 

desired value and reattach them. 

The nominal size of the device and that of the pipes must be 

the same. The pressure stages and, hence, the dimensions 

of the flanges must coincide. The surface roughness of the 

flange sealing surface must be suitable for the prescribed 

gaskets. 

Please check whether possible accessories like spring 

stops, gas/liquid-type dampers are still correctly sitting on the 

flange. Check whether the mounting clearance between the 

flanges of the pipes corresponds to the assembly dimension 

of the device plus two gaskets. To achieve stress-free 

mounting, the flanges of the pipes must be aligned parallel to 

each other. 

Use connecting bolts and gaskets in the prescribed 

dimensions. The gaskets must be suitable for the operating 

pressure, the temperature and the measured medium. With 

PTFE-coated devices, use gaskets whose interior and 

exterior diameter correspond to the sealing strip of the 

device. 

Tighten the screws crosswise so that the process 

connections are tight. See to the tightening torques of 

screws especially with PTFE-coated devices. 

The maximum torques for PTFE-coated devices are: 

DN15/DN25 = 14 Nm/DN50 = 25 Nm/DN80 = 35 Nm/DN100 

= 42 Nm (following VDI/VDE Guideline 3513). 

Please check whether the pipe is adequately stable to rule 

out the possibility of vibration or swinging of the device. (Do 

not use steel mounting parts on the device.) 

When gas is used as the medium, pay special attention to 

the position of the valve. If the device is calibrated to more 

than 1.013 bars absolute pressure, the valve is usually 

installed behind the flowmeter. At 1.013 bars absolute 

pressure (free exhaust) install it in front of the device. 

Page 7 of 28



7.1.4 Operation in hazardous areas 

7.1.4.1 Without electrical equipment 

The basic version of the flowmeter is a non-electrical device 

without its own ignition sources and meets DIN EN 13463-1 

requirements. It can be used in hazardous areas that 

require Category 2 equipment. 

Example for calculating the max. fluid temperature 

based on the max. ambient temperature for the built-in 

sensor Type ES for DN 15/25. 

T a = 70°C 

T amb = 60°C 

F = 0.2 

Marking: 

II 2GD c 

Tech. File Ref. 03-02 X 

⎛ Ta −Tamb 

⎞ ⎛ 70 ° C − 60° 

C ⎞ 

Tm = ⎜ ⎟ + Tamb = ⎜ 

⎟ + 60° 

C = 110° 

C 

⎝ F ⎠ ⎝ 0,2 ⎠ 

Since the device does not have its own power sources that 

would result in a temperature increase, the fluid temperature 

is decisive for the maximum surface temperature. 

When used in potentially explosive dust atmospheres, the 

device must be cleaned regularly in order to avoid deposits 

exceeding 5 mm. 

7.1.4.2 With built-in electrical limit transducers 

When the limit transducers are installed, the device becomes 

an electrical assembly and receives a marking in accordance 

with DIN EN 50014 from the entire device with the built-in 

electrical limit transducers. 

The electrical and thermal data and the special conditions of 

the EC Type Examination Certificate of the built-in limit 

transducers must be observed (see also the diagram in 

Section 7.3.2). 

The influence of the fluid temperature on the built-in limit 

transducers must be observed. The overtemperature of the 

maximum fluid temperature based on the maximum ambient 

temperature must be considered with a factor according to 

the following table: 

Nominal size 

Factor for 

standard 

version 

DN15 and DN25 0.2 0.07 

DN40 and DN50 0.25 0.085 

DN80 and DN100 0.3 0.1 

Example for built-in limit transducer for 

DN 15 and DN 25: 

Max. ambient temperature T amb = 40°C 

Max. fluid temperature T m = 120°C 

Factor for brought-in heat F = 0.2 

Temperature class T4 

T ü = 

T a = 

Overtemperature 

Ambient temperature of 

limit transducer 

Tü = Tm −Tamb 

= 120 ° C − 40° 

C = 80° 

C 

Ta = Tü * F + Tamb = 80° 

C *0,2 + 40° 

C = 56° 

C 

Factor for the 

device with the 

indicator pulled 

forward 

In accordance with the tables in the 

PTB 99 ATEX 2219 X EC Type Examination Certificate, the 

SJ 3,5-... N... inductive sensor must be operated in the 

T5 temperature class with an intrinsically safe circuit that 

does not exceed the maximum values of the Type 3 circuit. 

When using the device in hazardous areas, follow the 

applicable national installation rules. 

7.1.4.2.1 Marking for the device when the 

SJ 3,5...N... limit transducer is built in 

PTB 99 ATEX 2219 X 

II 2G EEx ia IIC T6-T4 

7.1.4.2.2 Marking for the device when the ES magnetoelectric 

transmitter is built in 

DMT 00 ATEX 075 

II2G EEx ia IIC T6 

7.1.4.2.3 Marking for the device when the KINAX 3W2 

angle-of-rotation transmitter is built in 

PTB 97 ATEX 2271 

II 2G EEx ia IIC T6 

7.2 Ambient conditions 

7.2.1 Ambient temperature ranges 

Without electrical accessories: 

-40°C to +80°C 

With limit transducer: 

-40 °C to +65°C 

With KINAX signal output: 

-40°C to +60°C 

With ES signal output: 

-40°C to +70°C 

For the hazardous area version, take note of the maximum 

ambient temperatures depending on the temperature class 

as specified in the Type Examination Certificate. 

7.2.2 Storage temperature 

The storage temperatures are identical to the ambient 

temperature ranges. 

7.2.3 Climatic category 

Weather-protected and/or unheated locations, class C 

7.2.4 Degree of protection 

IP 65 

7.2.5 Shock resistance/vibration resistance 

The meter should be protected from extreme shocks and 

vibrations, which could cause damage. 

7.2.6 Electromagnetic compatibility 

EN 61000-6-2:1999 Immunity industrial environment 

EN 50081-1 Emitted interference residential environment 

EN 55011:1998+A1:1999 Group 1, Class B 

NAMUR recommendation NE 21 

Page 8 of 28



7.3 Fluid conditions 

7.3.1 Fluid temperature ranges 

BGN-S/H : - 40°C to +200°C 

Special design: -80°C to +350°C 

BGN-P : - 20°C to +125°C 

7.3.2 Diagrams: Max. ambient temperature based on the fluid temperature for the ES 

Standard version 

70,0 

Max. ambient temperature [°C] 

60,0 

50,0 

40,0 

30,0 

20,0 

70 80 90 100 110 120 130 140 150 160 170 180 190 200 

Fluid temperature [°C] 

DN15/25 DN40/50 DN80/100 

Indicator pulled forward 

70,0 

Max. ambient temperature [°C] 

65,0 

60,0 

55,0 

70 80 90 100 110 120 130 140 150 160 170 180 190 200 

Fluid temperature [°C] 

DN15/25 DN40/50 DN80/100 

Page 9 of 28



7.3.3 Fluid pressure limit 

Standard design BGN-S/H – DN 15/25/40/50/80 PN 40; 

DN 100 PN 16 

Special design – up to PN 400 

BGN-P – DN 15/25/50/80/100 PN 16 

7.3.4 Inlet and outlet sections 

Inlet and outlet sections are not required for a linear flow 

profile of the fluid. For an extremely non-linear flow profile 

(e.g. shut-off/control valves are located in front of the meter), 

we recommend an inlet section with a mounting length of 

250 mm (see also guidelines in accordance with 

VDI/VDE 3513). 

7.3.5 Physical state 

Liquid or gaseous 

7.3.6 Density 

Liquids: up to 2.0 kg/l 

Gases: no restrictions 

7.3.7 Viscosity 

The influence of viscosity depends on various factors. 

Therefore, it must be calculated for each application. 

7.3.8 Pressure (for gas measurement) 

The measured values only apply to the calibrated fluid data 

stated on the scale. Any change or deviation in pressure will 

cause a display fault. 

7.3.9 Pressure loss 

Depends on the meter size and the measuring range (see 

Measuring range table). 

Page 10 of 28



8 Construction details 

8.1 Type of construction/dimensions 

8.1.1 Aluminum indicator housing 

8.1.2 Dimension drawing for heating 

connection 

Deviating mounting dimensions: 

(1) With preceding magnetic filter, 50 mm longer 

plus 2 gaskets 

(2) 265 mm with the indicator pulled forward 


(4) For special design DN 100: 120 mm 

8.1.2.1 Connections for heating jacket 

Pipe for 

Ermeto 12 mm 

Flange in acc. with DIN DN 15 or DN 25 PN 40 

Flange in acc. with ANSI ½“ 150 lbs 

The DN 25 flange is a special version. 

Dimensions: 

DN PN Inside diameter A 

15 40 26 74 

25 40 32 77 

40 40 46 88 

50 40 70 97 

80 16 102 113 

Page 11 of 28



8.1.3 Indicator housing made of stainless 

steel 

8.2 Weight 

Nominal size Weight [kg] 

DN 15 3 

DN 25 4.2 

DN 40 6 

DN 50 7.5 

DN 80 13 

DN 100 18 

Nominal size 

¾“, 150 lbs, ANSI 

B16.5 

1“, 150 lbs, ANSI 

B16.5 

1 ½“, 150 lbs, ANSI 

B16.5 

2“, 150 lbs, ANSI 

B16.5 

3“, 150 lbs, ANSI 

B16.5 

4“, 150 lbs, ANSI 

B16.5 

Weight [kg] 

3 

4.2 

6 

7.5 

13 

18 

Nominal size 

¾“, 300 lbs, ANSI 

B16.5 

1“, 300 lbs, ANSI 

B16.5 

1 ½“, 300 lbs, ANSI 

B16.5 

2“, 300 lbs, ANSI 

B16.5 

3“, 300 lbs, ANSI 

B16.5 

4“, 300 lbs, ANSI 

B16.5 

Weight [kg] 

3.4 

4.7 

6.8 

8.5 

14.5 

20 

DN PN Inside diameter A 

15 40 26 100 

25 40 32 103 

40 40 46 110 

50 40 70 122 

80 16 102 138 

Deviating mounting dimensions: 


Page 12 of 28



8.3 Material 

Fitting 

Type 

Measuring tube Lining of 

measuring 

tube 

Flanges Flange lining Float 

BGN – S Stainless steel none Stainless steel none Stainless steel 

BGN – P Stainless steel PTFE Stainless steel PTFE PTFE 

BGN – H DN15/25 ¾“/1“ Hastelloy HC4 none Hastelloy HC4 none Hastelloy HC4 

BGN – H > DN40 / 1½” Hastelloy HC4 none Stainless steel Hastelloy HC4 Hastelloy HC4 

Indicator 

Type Base plate Housing 

BGN – S/P/H Aluminum Aluminum, safety glass window 

Optional Stainless steel Stainless steel, safety glass window 

8.4 Process connection 

BGN-S/H 

BGN-P 

DN 15 PN 40 PN 16 

DN 25 PN 40 PN 16 

DN 40 PN 40 PN 16 

DN 50 PN 40 PN 16 

DN 80 PN 40 PN 16 

DN 100 PN 16 PN 16 

BGN S/ H 

BGN P 

ANSI ¾“ B16.5 150 lbs 1) 300 lbs 1) 150 lbs 2) 300 lbs 2) 

ANSI 1“ B16.5 150 lbs 1) 300 lbs 1) 150 lbs 2) 300 lbs 2) 

ANSI 1 ½“ B16.5 150 lbs 1) 300 lbs 1) 150 lbs 2) 300 lbs 2) 




1) Entire device PN 40 2) Entire device PN 16 

Additional equipment: special flanges, union, food connection, welding connection 

The S/H versions in special design are available up to PN 400. 

8.5 Magnetic filter 

The BGN flowmeter is sensitive to impure media. Before 

installing the device, clean the pipes of dirt, spatter and other 

foreign matter. If the medium comes with solid particles, 

connect a suitable filter in series. When dealing with flow 

media with ferrous particles, we recommend the connection 

of a magnetic filter. 

To protect both magnetic filter types, MF-S (stainless steel) 

and MF-P/S (PTFE/stainless steel), from corrosion, 

encapsulated permanent magnets are laid out in spiral form. 

The spiral mounting produces optimum effect at small 

pressure loss. The filter can be supplied with groove or 

tongue, projection or return, other standards or special 

connections according to customer wishes. 

Dimensions: 

DN 

g (mm) 

15 45 

25 68 

40 88 

50 102 

65 122 

80 138 

100 158 

Page 13 of 28



8.6 Electrical connection 

Wiring 

To connect the auxiliary power, remove the indicator cover, insert the connector cable into the cable gland and attach it to the 

terminals according to terminal diagram. Tighten the cable gland securely, remount the indicator cover and close it tightly. 

8.6.1 Wiring diagram for ES transmitter (signal output 4-20 mA with HART®) 

8.6.2 Wiring diagram for ES transmitter with 4-20 mA output and 2 limit transducers 

Page 14 of 28



8.6.3 Wiring diagram for ES transmitter with 4- 20 mA output, pulse output and limit transducer 

8.6.4 Wiring diagram for inductive limit transducers 

Page 15 of 28



8.6.5 Wiring diagram for KINAX 3W2 transmitter with 4-20 mA output, 2 wires 


Page 16 of 28




8.6.8 Wiring diagram for KEM 1 and KEM 2 double-throw microswitches 

Page 17 of 28



9 Indicator unit 

- Analog indicator approx. 90° with pointer 

- Customized product scale 

- ES transmitter with freely programmable user interface 

- Parameters may be changed based on the ES 

Operating Instructions. 

10 Auxiliary power 

see Electrical connection 

11 CE mark 

The measuring system meets the statutory requirements of 

the following EU directives: Directive 94/9/EC (Equipment 

and Protective Systems for Use in Potentially Explosive 

Atmospheres), the Electromagnetic Compatibility (EMC) 

Directive 89/336/EEC and the Pressure Equipment Directive 

97/23/EC. 

Measuring sensors with a connection nominal size equal to 

or smaller than or DN 25 fall within the scope of application 

of Article 3, section 3, of the Pressure Equipment Directive 

and need no CE mark in accordance with this directive. 

Heinrichs Messtechnik confirms compliance with the 

directives by attaching the CE mark. 

12 Order information 

Please include the following information in your order: 

Product data, specific weight, temperature, pressure, 

viscosity, material design, connection size, measuring range, 

desired accessories, required approvals and material 

certificates. See Device selection by model code. 

12.1 Available accessories 

- Stainless steel indicator unit, glass window IP 66 

- Indicator unit for high or low temperatures pulled 

forward by 100 mm 

- Fitting with heating or cooling jacket (with Ermeto or 

flange connection) 

- Float system with viscous damping 

- Float system with gas damping 

- Float system with spring stop 

- 1 or 2 inductive limit transducers 

- KINAX or ES electric transmitter 

- Drainable fitting (pump has been disconnected) 

- Magnetic filter 

13 Standards and directives, 

certificates and approvals 

- Certified to DIN-EN 9001 

- Production in accordance with AD guidelines and HPO 

approval (TRB200/TRD201) 

- TÜV approval for welding requirements in accordance 

with DIN-EN 729-2 

- Measuring range rated and converted to other products 

according to VDE/VDI guidelines 3513 

- Directive 94/9/Ec (Equipment and Protective Systems 

for Use in Potentially Explosive Atmospheres) 

- EN 50014:1997+A1-A2 - General requirements 

- EN 50020:1994 - Intrinsic safety “i” 

- Directive 89/336/EEC (EMC Directive) 

- EN 61000-6-2:1999 – Immunity industrial environment 

- EN 50 081-1 – Emitted interference residential 

environment 

- EN 55011:1998+A1:1999 – Group 1, Class B 

- NAMUR recommendation NE 21 

- EN 60529 – Degrees of protection through housing (IP 

code) 

- EN 61010 – Safety requirements for electrical 

measuring, control and laboratory devices 

- EN 60947-5-6:2000 – Switchgear and controlgear 

- Directive 97/23/EC (Pressure Equipment Directive) 

14 Replacement parts 

The following parts can be ordered as replacement parts: 

1 ) Indicator cover with 

window/gasket/screws 

2 ) Scale with standard scaling 

3 ) Pointer 

4 ) Limit value indicator 

5 ) Pointer stop 

6 ) Float with guides and safety screw 

7 ) Spring stop 

8 ) Complete gas damping set with float 

9 ) Complete viscous damping set with float 

10) Screwed cone set with float for 

small measuring range up to 40 l/h 

11 ) Limit value initiatior 

Page 18 of 28


15 Exploded views 


15.1.2 BGN-.... with spring stop 

15.1 Fitting with measuring element 

Name 

(Figures 12-16) 

Part no. 

Fitting 1 

Float 2 

Spring stop for float 3 / 4 

Cone with float, gasket and stop 

(Fig. 16) 

2/3/4 

Complete BGN gas damping set 

with float (Fig. 14) 

2/3/4 

4 

3 

2 

15.1.1 BGN-.... Standard version 

1 

2 

Figure 13 

15.1.3 BGN-.... with damping piston 

1 

4 

3 

Figure 12 

2 

1 

Figure 14 

Page 19 of 28



15.1.4 BGN-.... with damping piston and 

spring stop 

4 

3 

2 

1 

Figure 15 

15.1.5 BGN-.... small measuring ranges 

1 

2 

3 

4 

Figure 16 

Page 20 of 28


15.2 Indicator unit 

Name 

Part 

no. 

Mounting plate with 1 thread M 20 x 1.5 10 

Mounting plate with 2 threads M 20 x 1.5 11 

Bearing unit 20 

Fixing screws for bearing unit 30 

Dummy plug M 20 x 1.5 40 

Cable gland 41 


Scale, blank 50 

Scale, product scale according to original shipment (order no. 

necessary) 

51 

Screw for fixing the scale 60 

Zero-point screw with nut 70 

Indicator cover with glass window, gasket, screws 80 

Scale pointer with hub 90 

Scale pointer with hub and 2 switching dials 91 

Scale pointer with hub and linearization disc 92 

Scale pointer with hub and linearization disc/switching dial 93 

Scale pointer with hub and 2 switching dials and ES position 

magnet 

94 

1. SJ 3,5 N limit transducer with limit value indicator 110 

1. SJ 3,5 SN limit transducer with limit value indicator 111 



Connection plate for 1 limit transducer with mounting parts 130 

Connection plate for 2 limit transducers with mounting parts 131 

Installation set for transmitter type KINAX 3W2 Ex with 

lever arm and mounting parts 

132 

Installation set transmitter type KINAX 3W2 Ex with 

lever arm and mounting parts and connection for a limit 133 

transducer 

Installation set transmitter ES Ex Hart 140 

Installation set transmitter ES Ex with switch (min-max) 141 

Installation set transmitter ES Ex with Profibus 142 

15.2.1 Complete indicator unit, local with 

scale 


15.2.2 Complete indicator unit with 1 SJ 3,5 

N limit transducer 

70 

60 

30 

Figure 2 

15.2.3 Complete indicator unit with 2 SJ 3,5 

N limit transducers 

80 

50 

70 

110 

111 

91 

130 

20 

30 

41 

10 

80 

80 

50 

70 

70 

70 

60 

50 

70 

60 

120 

121 

110 

111 

90 

91 

20 

131 

30 

30 

20 

30 

30 

40 

Figure 1 

Figure 3 

41 

10 

10 

Page 21 of 28



15.2.4 Complete indicator unit with E2 

KINAX Ex transmitter 

15.2.6 Indicator unit with transmitter type 

ES Ex HART® 

80 

80 

50 

50 

70 

70 

70 

70 

60 

60 

(141) 

(142) 

140 

94 

92 

20 

132 

30 

30 

30 

20 

30 

42 

Figure 4 

41 

Figure 6 

10 

10 

15.2.5 Complete indicator unit with E2 

KINAX Ex transmitter and 1 SJ 3,5 N limit 

transducer 

70 

60 

110 

111 

30 

Figure 5 

80 

50 

70 

93 

133 

20 

30 

41 

11 

Name 

Part 

no. 

Mounting plate with 1 thread M 20 x 1.5 10 

Mounting plate with 2 threads M 20 x 1.5 11 

Bearing unit 20 

Fixing screws for bearing unit 30 

Dummy plug M 20 x 1.5 40 



Scale, blank 50 

Scale, product scale according to original shipment (order 

no. necessary) 

51 

Screw for fixing the scale 60 

Zero-point screw with nut 70 

Indicator cover with glass window, gasket, screws 80 

Scale pointer with hub 90 

Scale pointer with hub and 2 switching dials 91 

Scale pointer with hub and linearization disc 92 

Scale pointer with hub and linearization disc/switching 

dial 

93 

Scale pointer with hub and 2 switching dials and ES 

position magnet 

94 





Connection plate for 1 limit transducer with mounting 

parts 

130 

Connection plate for 2 limit transducers with mounting 

parts 

131 

Installation set for transmitter type KINAX 3W2 Ex with 

lever arm and mounting parts 

132 

Installation set transmitter type KINAX 3W2 Ex with lever 

arm and mounting parts and connection for a limit 133 

transducer 

Installation set transmitter ES Ex Hart 140 

Installation set transmitter ES Ex with switch (min-max) 141 

Installation set transmitter ES Ex with Profibus 142 

Page 22 of 28



16 EC Type Examination Certificate 

Page 23 of 28



Page 24 of 28



Page 25 of 28



Page 26 of 28



Page 27 of 28



17 Sales representatives 

ADINCO BV, Bosmanskamp 30, 4191 MV Geldermalsen. 

tel +31 345 596 000, fax +31 345 596 001, heinrichs@adinco.nl 

18 Notes www.heinrichs-mt.nl 

Page 28 of 28

Since 1970 

Representative for 

Heinrichs 

www.heinrichs-mt.nl 

Adinco bv 

P.O.Box 90 

4190 CB Geldermalsen 

Netherlands 

Tel. +31 (0) 345 59 60 00 

Fax +31 (0) 345 59 60 01 

E-mail: info@adinco.nl 

Internet: www.adinco.nl

Variable-Area Flowmeter Device Description - Adinco bv

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