Pressure Switches

Energize or de-energize electrical circuits as a function of whether the process pressure is normal or abnormal.

PSW-850 Series General Purpose Controls with Choice of Dual or Triple Switches Two or Three-Switch Outputs — can Be Separated up to 100% of Range Adjustable Pressure Ranges: inWC (inH₂O) Ranges: -300 to 250 inH₂O Pressure Ranges: 30 inHg Vac to 3000 psi (-1 to 206 bar)	PSW845 Series Differential Pressure Switch Rugged Differential Switch with Excellent Bypass Characteristics 0.25A SPDT Switch Ranges to 250 PSID Steel, Anodized Aluminum, Buna and Loctite #271 Wetted Parts	PSW-800 Economical Industrial Pressure Switches for Vacuum to 7500 psi UL and CSA Marked Easy Adjustment with Locking Set Screw Rugged Industrial Design Standard 1 /2 " Female Conduit Fitting for Electrical Termination
PSW-700 Heavy Duty Industrial Switches, Single or Dual Setpoint, Internal or External Adjustment UL Listed Division 1 Rating Dual Set Points, Tamper Resistant Heavy Duty Enclosure Rated NEMA-4X, -7, -9, IP66 Terminal Block Wiring High Temperature Operation to 200°C (392°F) Process Temperature	PSW-690 Series High Purity Pressure/Vacuum Switches with All Stainless Steel Wetted Parts All Stainless Steel Wetted Parts Sensing Element Capsule, Electron Beam Welded Helium Leak Tested 4 x 10^-9 STD CC/sec Available with 1/4 VCR Male or 1/8-27 NPT Male Fittings	PSW-681 Series Low Pressure/Vacuum Switches Compound Range Covers Vacuum and Pressure in One Unit Low Inch of Water Ranges Silver Switch Contacts Rated for 5 Amps @ 250 Vac 1 Amp, Gold-Plated Contacts for TTL or Dry Contacts
PSW-621 Series Economical Pressure and Vacuum Switches External Pressure Scale and Pointer for Easy Setpoint Adjustment Silver Switch Contacts Rated for 5 Amps @ 250 Vac or 3 Amps @ 28 Vdc 1 Amp Gold-Plated Contacts for TTL or Dry Contacts	PSW-601 Solid State Switches for High Cycle Applications Watertight, Corrosion-Resistant Case Thin Film Sensor for Long Stabile Life – Minimum 1 Million Cycles at Rated Load Reliable in Industrial Environments Field Adjustable	PSW-581 Economical OEM Pressure Switches, Vacuum to 500 psi Sensor: Aluminum diaphragm Enclosure: Switch actuator and bracket steel: irridite finish; adjusting cap and body: zinc alloy chromate finish Pressure Port: ¼ NPT male
PSW-500 Miniature Pressure and Vacuum Switches External Pressure Scale and Pointer for Easy Setpoint Adjustments 5 Amp Model Switches With High Proof Pressures 1 Amp Gold-Plated Switches for TTL and Dry Contact Closures Wetted Parts: Stainless Steel, Sealing Compound and or O-ring	PSW-400 Heavy Duty "Division 1" Industrial Pressure Switches Dual Chamber Design Isolates Electronics from Pressure Media Heavy Duty Cast Aluminum with Corrosion-Resistant Epoxy Coating Meets NEMA-7 and -9 Classifications Gasketed Covers Tamper/Vibration Resistant Setpoint Adjustment Surface and Mounting Bracket Standard	PSW-370-Series Stainless Steel Pressure Switches for Harsh Environments, Dual 15 A SPDT Switches All-Stainless NEMA-4X Case Resists Industrial Corrosion Designed for Tough Industrial Applications with Long Life UL and CSA Rated Switches Ranges from 5 inH₂O to 3000 psi Easy to Adjust with Internal Reference Scale PTFE or Stainless Steel Diaphragms
PSW-351-Series NEMA-4X Differential Pressure Switches Setpoint Repeatability of ±1% Rugged Epoxy-Coated NEMA-4X Watertight Enclosure Dependable Switch Actuation Between the Two Input Pressures High Static Pressure Single Setpoint with Adjsutable Deadband or Dual Setpoint with Fixed Deadband	PSW-300 NEMA-4X Watertight Pressure Switch for Harsh or Corrosive Environments UL Listed, CSA Certified Low Pressure Ranges 30 inHg Vac to 150 inH₂O High Pressure Ranges 15 to 3000 psi Buna-N or 316SS Diaphragm 10 A SPDT Switch Tamper/Vibration Resistant Setpoint Adjustment 20 to 100% of Range Fixed or Adjustable Deadband	PSW-200 Industrial Pressure Switches for Harsh Environments Rugged One-Piece Epoxy-Coated Aluminum Body Meets NEMA-4X Classifications UL Listed, cUL Certified Stainless Steel Nameplate Internal Reference Scale with Adjustment Lock Hermetically Sealed SPDT or DPDT Switch UL Listed, cUL Certified Class I, Division 2, Groups A, B, C, D Class II , Division 2, Group G Class III
PSW-190 Economical Brass Pressure Switches Available Buna-N or FKM Diaphragm and O-ring Contacts Rated for 5 Amps at 250 Vac or 30 Vdc Pigtail Lead with Conduit Connection High Operating Pressure	PSW-180 Economical Differential Pressure Switches/Alarms 5 Amp Relay or Built In Audible Alarm Available Up to 150 PSI Operating Pressure NEMA-4 Rated Housing	PSW-150 General Purpose Differential Pressure Switches UL Listed 15 Amp SPDT Easy Adjustments Vibration-Resistant Setpoints
PSW-100 General Purpose Pressure Switches, In NEMA-4X Enclosures UL Listed, Ranges from 0.5 inH₂O to 3000 psi SPDT or DPDT Switches Adjustment Lock Safe, Easy Wiring Access	PSW14 Series Electronic Pressure Switch Single Switch with Adjustable Hysteresis Dual Switch with Fixed Hysteresis Easy to Program On/Off Set Points Compact Construction Housing Rotates 320° Degrees	PSW-12 Compact, Vibration Resistant Switches for Class I Hazardous Locations Compact Stainless Steel Construction Belleville Technology for Long Life, Vibration Resistance and Stability Easy Field Setting and Adjustment SPDT Sealed Switches Strain Relief 1.8 m (72") Lead Wires Mounting Bracket For Retrofit Applications