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Low pressure, Vacuum and Differential Pressure Switch | 645 Series

Supplier: Koloona Industries

Measuring down to 0.5" water column allows this 645 Series Low pressure, Vacuum and Differential Pressure Switch to be used for low airspeed switching as well as cooling fan control. The switch is also available in a wet-wet configuration for fuel systems.

Price Guide: POA

Available in a variety of configurations which allows the switching of low pressure, Vacuum & Differential Pressures.


  • Lightweight, aluminum construction
  • Low pressure ranges
  • Fully enclosed design for harsh environments
  • Wet-wet configurations for fuel systems
  • SPDT & DPDT electrical switch options available

Product Specifications

  • Standard Tolerance ±10%
  • Switch Type SPDT (single pole / double throw) or DPDT (double pole / double throw)
  • Switching Medium: Air or compatible fluids
  • Mechanical Life: 100,000 cycles
  • Set-Point Ranges: 0.1 to 6 PSI
  • Proof Pressure: 75 PSI
  • Hysteresis: 10% to 50% of set point
  • Operating Temp: -65°F to 350°F
  • Case Material: 2024T351 Aluminum, Gold Anodized
  • Seal: Varies by option Diaphragm: Mylar
  • Pressure Port: Varies by option 
  • Electrical Connections: Wire leads or Mate n lok 1-480701
  • Weight: Less than 6 ounces
  • Current Rating: Resistive 5 AMP
  • Operating Voltage: 30VDC

For more information or a qoute on the Low pressure, Vacuum & Differential Pressure Switch please call or email today.