The model 7970 pressure sensor is a heavy duty pneumatic or hydraulically controlled switch that can sense pressures ranging from 10 to 10,000 psig - in 1 switch, no extra parts or different springs are needed. This is accomplished by dividing the sensing pressure field into four ranges via a brilliantly designed variable area sensing piston.
Four piston configuration ranges:
Changing the piston arrangement is accomplished by simple re-arrangement of the piston parts installed, plus those found in the onboard parts tube located in the center of the sensing spring.
All this and a deadband of only 3-4% of setpoint and industry leading economics of ownership.
Dimensions: 1.750” Dia. X 8.000” L.
Working Pressure: Sensed Inlet - 10 - 10,000 PSIMax.
Process Connections: 1/2”-14 MNPT & 1/8”-27 FNPT
Control Connections: 1/4”-18 FNPT
Weight: 3.5 lbs.
Panel Mount Detail: 1 5/8” diameter hole required.
A. Instrument Supply pressure 30-125 PSI Pneumatic or Hydraulic.
B. Extra parts for changing piston arrangements are stored in tube in adjusting cap.
Other 7970 Series Models available:
7970-20M - 2,000-20,000 PSI Adjustment Range with 9/16 Medium Pressure Conn
7970-20H - 2,000-20,000 PSI Adjustment Range with 9/16 High Pressure Conn
7970T - Teflon “wetted” O-rings, NACE Certified
7970LP - Low Pressure, 2-50 PSI adjustment range
7970H-A - Offset instrument controls ports for 3/8 tubing
7970SS - All stainless steel (316SS)
7970DSS - Duplex stainless steel “wetted” parts
For piston re-configuring and re-ranging instructions watch the video linked above.