EL-PRESS Metal Sealed P-502CM

Metal-Sealed Digital Electronic Pressure Meter

  • Patented metal-to-metal seal construction ensures long-term leak tightness (to atmosphere)
  • Electropolished wetted parts
  • Cleanroom assembled
  • High accuracy, excellent repeatability
  • Well proven, compact thru-flow design
  • On-board PID controller for pressure control
  • Analog, RS232 and fieldbus communication
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EL-PRESS Metal SealedP-502CM

Metal-Sealed Digital Electronic Pressure Meters

Bronkhorst® model P-502CM Electonic Pressure Transducers (EPTs) are designed especially to meet the requirements of the semicon market as well as other high purity gas applications. The instruments feature high surface quality and are of modular construction with metal-to-metal seals that ensure long-term leak tightness. The P-502CM is suited for precise measurement of pressure ranges between 2…100 mbar and 1,28…64 bar absolute or 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.

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 DeviceNet™, PROFIBUS DP, Modbus, EtherCAT®, PROFINET or FLOW-BUS protocols.

Technical specifications

Measurement / control system
Absolute pressure sensors Code: 350A  -  Ranges (FS): 100 ... 350 mbara  -  P-max: 1,0 barg  -  Burst pressure: 1,4 barg
Code: 1K1A  -  Ranges (FS): 0,35 ... 1,1 bara  -  P-max: 3,1 barg  -  Burst pressure: 4,2 barg
Code: 6K0A  -  Ranges (FS): 1,1 ... 6 bara  -  P-max: 10,5 barg  -  Burst pressure: 14 barg
Code: 21KA  -  Ranges (FS): 6 ... 21 bara  -  P-max: 62 barg  -  Burst pressure: 84 barg
Code: 64KA  -  Ranges (FS): 21 ... 64 bara  -  P-max: 100 barg  -  Burst pressure: n.a.
Relative pressure sensors Code: 350R  -  Ranges (FS): 100 ... 350 mbarg  -  P-max: 1,0 barg  -  Burst pressure: 1,4 barg
Code: 1k1R  -  Ranges (FS): 0,35 ... 1,1 barg  -  P-max: 3,1 barg  -  Burst pressure: 4,2 barg
Code: 6K0R  -  Ranges (FS): 1,1 ... 6 barg  -  P-max: 10,5 barg  -  Burst pressure: 14 barg
Code: 21KR  -  Ranges (FS): 6 ... 21 barg  -  P-max: 62 barg  -  Burst pressure: 84 barg
Accuracy (incl. linearity and hysteresis) standard: ±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…+50°C;
up to +70°C on request
Temperature sensitivity 0,1% FS/°C
Leak integrity, outboard < 2 x 10-11 Pa.m3/s He
Attitude sensitivity may be mounted in any position
Warm-up time negligible
Mechanical parts
Material (wetted parts) stainless steel 316L or comparable
Process connections 1/4" face seal couplings
Seals metal-to-metal (no rings)
Weight 0,6 kg
Ingress protection (housing) IP40
Electrical properties
Power supply +15…24 Vdc
Max. power consumption
15 V
24 V
at voltage I/O
67 mA
49 mA
at current I/O
90 mA
67 mA
Max. power consumption
15 V
24 V
at voltage I/O
223 mA
150 mA
at current I/O
223 mA
150 mA
PROFIBUS DP add 53 mA (15 V supply) or 30 mA (24 V supply)
PROFINET add 77 mA (15 V supply) or 48 mA (24 V supply)
EtherCAT® add 66 mA (15 V supply) or 41 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: PROFIBUS DP, DeviceNet™, PROFINET, EtherCAT®, Modbus RTU or ASCII, FLOW-BUS
Electrical connection
Analog/RS232 9-pin D-connector (male);
PROFIBUS DP bus: 9-pin D-connector (female);
power: 9-pin D-connector (male);
Devicenet™ 5-pin M12-connector (male);
EtherCAT®/ PROFINET 2 x RJ45 modular jack (in/out)
FLOW-BUS/Modbus-RTU/ASCII RJ45 modular jack

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 productpage on our website


Metal Sealed Mass Flow and Pressure brochure

Quick installation guide EL-PRESS

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

Bronkhorst High-Tech B.V.

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

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