Posted in | Oxygen Sensors

The MDM4901FL Differential Pressure Transmitter for Oxygen Service

The Fluorinated® oil used in the MDM4901FL Differential Pressure Transmitter, which is intended for measuring oxygen pressure, offers excellent levels of precision, stability, and safety. The MDM4901FL Differential Pressure Transmitter is widely utilized in the pharmaceutical and medical sectors, with a focus on measuring gas pressure in medical oxygen-generating machinery and oxygen storage tanks.


  • Grease prohibited in production, oxygen cleaning follows CGA G-4.1, ASTM G93-03
  • The ex-proof version MDM4901FL complies with GB3836.4 Exia II CT6 Ga; ex-proof certificate is approved
  • Laser welding, full-sealed construction; protection IP65
  • Temperature compensation and aging, stable performance
  • Full stainless-steel construction, compact size, easy installation
  • 316 L isolated diaphragm with piezoresistive differential pressure sensor
  • CE and ROHS certificates
  • Zero and span adjustable outside


  • Pressure range: 0 ~ 350 mbar ... 35 bar
  • Max static pressure: 200 bar
  • Electrical connection: plug connection or Φ7.2 mm 7 pin cable
  • Power supply: 15V~28V DC
  • Insulation resistor: 100MΩ, 500V DC
  • Output signal: 2-wire 4mA~20mA DC; 3 wire 0V~5V DC
  • Response time (10%~90%): ≤1ms

Construction Performance

  • O-ring: EPDM
  • Housing: stainless steel 304
  • Pressure port: G1/4 female
  • Filled liquid: Fluorinated® oil
  • Diaphragm: stainless steel 316 L

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