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RB21F Series Pressure Transmitter


A flush diaphragm pressure transmitter is specially designed for measuring pressure in challenging applications, such as those involving highly viscous or solid-laden fluids. Unlike traditional pressure transmitters, flush diaphragm transmitters feature a diaphragm that sits flush with the device's front, preventing debris buildup and contamination.


Main Features

  • Precise & accurate
  • Flush Diaphragm process connection
  • Wide range compatibility
  • Fully welded design


  • Pharma application
  • Very low Range pressure measurement
  • Factory automation
  • Chemical process plant

Technical Specifications

Performance Characteristics
Pressure type Relative(gauged) & Absolute
Compensated temperature range -10 ... 55 C
Measuring Range 0... 100 mbar
Long term stability <0.3 % FSR/year
Accuracy 0.5% FS
Response time <5 ms
Min. measuring span 100 mbar
Max. measuring span 400 bar
Over pressure 1.5 times FS
Temperature coefficient <0.15 % FSR/10K, measuring span
<0.25 % FSR/10K, zero point
Process temperature -30 ... 80 C
Process pressure Refer measuring range for Process pressure
Connection variants G 1/2 Flush Diaphragm
Material of Construction
Diaphragm SS316L
Pressure port SS304
Housing SS304
Sealing NBR
Output Signal
Current output 4 ... 20 mA, 2-wire
Voltage output 0~5VDC
Electrical Connection
Connector DIN 43650
M12 connector
Cable 2m cable exit
Power Supply
Voltage supply range 11 ... 30V DC, with 4 ... 20 mA output signal
15 ... 30V DC, with 0 ... 1 0V output signal
5V DC ratiometric ... with 0.5 ... 4.5V output signal