Setra 225 Ultra High Purity Pressure

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Setra’s Model 225 is ideally suited for high-purity gas delivery systems semiconductor processes, and control applications that require ultra-clean operation, high throughput perfomance, and exceptional long-term stability.

Setra 225 Features

  • Superior Stability Avoids Downtime
  • EMI/RFI Immunity Prevents False Shutdown
  • Sturdy Design Allows Trouble-Free Installation


Setra’s Model 225 is ideally suited for high-purity gas delivery systems in semiconductor processes, and control applications that require an ultra-clean operation, high throughput performance, and exceptional long-term stability.

Designed with a low cavity volume of 0.11 in3, which virtually eliminating particle entrapment, the GCT-225 can be purges easily. All wetted parts are 316L VIM/VAR stainless steel passivated to 5 Ra (7 Ra. max.) finish, which eliminates surface irregularities and provides the proper surface chemistry for corrosion resistance, assuring contaminant-free gas distribution. Every sensor is mass spectrometer helium leak tested to 1 x 10-9 ATMCC/sec.

The Model 225 Series comes with a rotatable cover for easy access to 12-turn potentiometers for zero and span adjustment. Standard swivel male or female face seal pressure fittings meet the semiconductor industry requirements. Besides, several other fittings styles are available.

The 225 if offered with a 5 VDC, 10 VDC or 4-20mA output.  A six-foot multiconductor cable or Bayonet connector provided for electrical termination. Setra’s patented variable capacitance sensor features a VIM/VAR 316L stainless steel diaphragm and an insulated electrode plate. A variable capacitor formed between the sensor body and the electrode plate. An increase in pressure causes a slight rounding of the diaphragm, which decreases the capacitance.  The capacitance change is detected and converted to a highly accurate linear DC electric signal. Setra’s unique custom integrated circuit utilizes a patented charge balance principle and is virtually EMI/RFI immune.

Data Sheet: Setra_Model_225_Data_Sheet

User Manual: Setra_Model_225_Operating_Instructions