Digital Electronic Pressure Meter, Industrial Style

  • For absolute or gauge pressure
  • High accuracy and repeatability
  • Well proven, compact thru-flow design
  • Rugged, weatherproof housing (IP65, dust and waterproof)
  • On-board PID controller for pressure control
  • Analog, RS232 and fieldbus communication
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Digital Electronic Pressure Meters, Industrial Style

Bronkhorst® model P-502CI Electonic Pressure Transducers (EPTs) are suited for precise measurement of pressure ranges between  2…100 mbar and 1,28…64 bar absolute or between 0,7...35 mbar and 1,28...64 bar gauge. The EPT has a well-proven compact thru-flow design and includes a diaphragm type piezo-resistive pressure sensor, a microprocessor based pc-board with signal and fieldbus conversion and a PID controller for optional pressure control by means of a separately mounted control valve. The IN-PRESS model is of rugged design (IP65) for use in industrial environments or even Zone 2 hazardous areas, with optional ATEX Cat. 3 approval.

IN-PRESS series are equipped with a digital pc-board, offering high accuracy, excellent temperature stability and fast response. The main digital pc-board contains all of the general functions needed for measurement and control. In addition to the standard RS232 output the instruments also offer analog I/O. As an option, an on-board interface can be mounted to provide CANopen®, DeviceNet™, PROFIBUS DP, PROFINET, Modbus RTU/ASCII or FLOW-BUS protocols.

Technical specifications

Measurement / control system
Absolute pressure sensors Code: 350A  -  Ranges (FS): 100 ... 350 mbara  -  P-max: 1,0 bara
Code: 1K1A  -  Ranges (FS): 0,35 ... 1,1 bara  -  P-max: 3,1 bara
Code: 6K0A  -  Ranges (FS): 1,1 ... 6 bara  -  P-max: 10,5 bara
Code: 21KA  -  Ranges (FS): 6 ... 21 bara  -  P-max: 62 bara
Code: M10A  -  Ranges (FS): 20 ... 100 bara  -  P-max: 200 bara
Relative pressure sensors Code: 100R  -  Ranges (FS): 35 ... 100 mbarg  -  P-max: 0,7 barg
Code: 350R  -  Ranges (FS): 100 ... 350 mbarg  -  P-max: 1,0 barg
Code: 1k1R  -  Ranges (FS): 0,35 ... 1,1 barg  -  P-max: 3,1 barg
Code: 6K0R  -  Ranges (FS): 1,1 ... 6 barg  -  P-max: 10,5 barg
Code: 21KR  -  Ranges (FS): 6 ... 21 barg  -  P-max: 62 barg
Accuracy (incl. linearity and hysteresis) ±0,5% FS
Repeatability < 0,1% Rd
Pressure rangeability 1:50 for pressure meter;
1 : 20 for P2-control; 1 : 5 for P1-control
Response time (sensor) 2 msec
Operating temperature -10…+70°C;
for ATEX cat. 3 0…50°C
Temperature sensitivity 0,1% FS/°C
Leak integrity, outboard tested < 2 x 10-9 mbar l/s He
Attitude sensitivity max. error at 90° off horizontal < 0,3 mbar
Warm-up time negligible
Mechanical parts
Material (wetted parts) stainless steel 316L or comparable
Process connections compression type or face seal couplings
Seals standard: Viton®; options: EPDM, Kalrez® (FFKM)
Ingress protection (housing) IP65
Electrical properties
Power supply +15…24 Vdc
Max. power consumption
15 V
24 V
at voltage I/O
95 mA
65 mA
at current I/O
125 mA
85 mA
Max. power consumption
15 V
24 V
at voltage I/O
290 mA
200 mA
at current I/O
320 mA
215 mA
PROFIBUS DP add 53 mA (15 V supply) or 30 mA (24 V supply)
DeviceNet™ add 48 mA (24 V supply)
Analog output/command 0...5 (10) Vdc or 0 (4)…20 mA (sourcing output)
Digital communication standard: RS232;
options: CANopen®, DeviceNet™, PROFIBUS DP, PROFINET, Modbus RTU/ASCII or FLOW-BUS
Electrical connection
Analog/RS232 8 DIN (male);
PROFIBUS DP bus: 5-pin M12 (female);
power: 8 DIN (male);
PROFINET bus: 2 x 5-pin M12 (female) (in/out);
power: 8 DIN (male);
Devicenet™ 5-pin M12 (male);
FLOW-BUS/Modbus-RTU/ASCII 5-pin M12 (male)

Note: The measuring cell of the pressure sensore is separated from the external pressure by a thin, sensitive stainless steel diaphragm, and the sealed off cavity between diaphragm and cell is filled with oil. Since the standard oil filling is flammable, Bronkhorst advises to take precautions when oxygen or any other explosive fluid is used.

Technical specifications subject to change without notice.

For dimensional drawings and hook-up diagrams please visit the product page on our website


IN-PRESS brochure

General manual digital instruments
Operating instructions digital instruments

Hook-up diagrams
Analog IO - RS232
Optional Bus and IO Configurations

Dimensional drawing

KCs certificate EL-PRESS EPT models (Korean)

Bronkhorst High-Tech B.V.

Nijverheidsstraat 1A
NL-7261 AK Ruurlo (NL)
Tel. +31 573 45 88 00
[email protected]

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