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Model 225 UHP Pressure Transducer
- 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.
- Designed with a low cavity volume of 0.11 in3, virtually eliminating particle entrapment, the GCT-225 can be easily purged. All wetted parts are 316L VIM/VAR stainless steel passivated to 5 Ra (7 Ra. max.) fi nish, 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. In addition, several other fittings styles are available.
- The 225 if offered with a 5 VDC, 10 VDC or 4-20mA output. A six-foot mult-iconductor cable or Bayonet connector is 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 is 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.