Designed for demanding special gas monitoring applications, the Setra Model 224 Ultra High Purity Pressure Transmitter meets the requirements of this type of application without compromising structural integrity, purity, and performance.
The Model 224 Pressure Transmitter features a small streamlined sensor chamber that is easy to purge. The sensor has excellent mechanical stability and thermal stability, especially without the effects of temperature transients caused by airflow. The sensing element is isolated from the pressure port, virtually eliminating the torque effect.
The excellent mechanical and thermal stability of the Type 224 Pressure Transmitter is primarily due to the use of Setra’s patented variable capacitance technology. The overall design of the sensor is very simple, the liquid parts are made of VIM/VAR 316L stainless steel, and the surface is passivated and polished to 5 Ra (maximum 7 Ra) to ensure the surface is flat; the insulated electrode plate is fixed at the center of the sensor diaphragm and can be combined with the sensor body. Variable capacitance. As the pressure increases or decreases, the capacitance value also changes accordingly. The sensor detects the change in capacitance and converts it to a linear analog signal via Setra’s unique integrated circuit.

The Model 224 transmitter can withstand temperatures up to 85 ° C and can be calibrated at high temperatures. Each sensor was subjected to a helium leak test at the 1×10-9 ATM.CC/sec level using a mass spectrometer.

  • Low leakage rate
  • VCR connector
  • A small chamber that is easy to purge
  • 200PSI/250PSI/3000PSI


  • 316 L VIM/VAR stainless steel
  • Surface finish 7 Ra
  • VCR connector
  • 1×10-9 ATM.CC/sec level ammonia leakage test
  • Easy to purge
  • Very insensitive to temperature transients in fluids
  • 4-20mA output type is non-flammable and suitable for potentially hazardous areas
  • Meets CE and RoHS standards


  • High purity gas delivery system
  • Semiconductor process tools
  • Pharmaceutical and biotechnological processes
  • Gas Cabinet