KPH300 - Mechanical Pressure Switch


  • Switching Ranges from 3-30 to 450-4600 PSIG
  • Field Adjustable Setpoint
  • Diaphragm or Piston Type Sensing Element
  • Micro-Switch Contact
  • Reliable and Economical
  • Excellent OEM Product


The KPH300 is an excellent choice for pressure switching applications that require a reliable solution and low cost. The KPH300 utilizes the proven diaphragm or piston sensing tech-nology depending on the measuring range chosen. The set-point and hystersis are f eld adjustable via a 2 mm hex nut adjuster protected from the elements beneath the DIN 43650 electrical connector. The switch can also be factory set at the setpoint you specify. The SPDT micro-switch contacts are silver plated for extended service life. The combination of high reliabi-lity design and low cost makes the KPH300 an excellent choice for OEM and end user applications alike.



Applications: Liquids or compressed gases compatible with the wetted materials 
Pressure Ranges: 3-30 PSIG to 450-4600 PSIG
Fitting: 1/4" NPT male, others available in OEM quantities 
Measuring Element
At or Below 225 PSIG: NBR diaphragm 
Above 225 PSIG: Steel piston with NBR seal
Wetted Materials: Zinc plated steel and NBR 
Housing Material: Thermoplastic 
Operating Temp. Range: -4°F to 176°F 
Setpoint Repeatability: ±2% of the full scale range
Setpoint Hysteresis: 10% to 30% of the adjusted value
Contact Rating: 4 amps to 120 VAC, 4 amps to 250 VAC, 2 amps to 28 VDC
Electrical Connection: DIN 43650 plug w/ cable gland
Electrical Protection: NEMA 4/ IP65



KPH300 - Mechanical Pressure Switch



KPH300 - Mechanical Pressure Switch