LSP Series Air Flow Switch for HVAC Ducts

Brand: KOBOLD Instruments, Inc

KOBOLD LSP air flow switches are widely used to control air flow setpoints in HVAC duct applications. The principle of operation is quite simple. Air flow exerts a force on a paddle, actuating a dust-tight SPDT micro switch. 

The switching point may be adjusted continuously within a wide range, making the LSP useful in a wide variety of applications. The flow switch is factory set to switch at 195 FPM. 

To handle air velocities greater than 920 FPM, the paddle may be cut at a pre-calibrated mark. This automatically changes the factory setpoint to 490 FPM.
  • Adjustable Switch point
  • SPDT Mechanical Switch
  • For Horizontal Square/Rectangular HVAC Ducts
  • Quick Delivery


Switching Range

  • 195 to 1575 FPM

Wetted Materials

  • Galvanized Steel
  • Brass
  • Stainless Steel


  • Base: ABS
  • Cover: Polycarbonate

Switch Capacity

  • 15 A Resistive
  • 8 A Inductive

Maximum Temperature

  • 185° F

Ingress Protection

  • IP65


  • Flat Plate for Square/Rectangular HVac Ducts

Media Category

  • Gas

  • Air Conditioning Ducts
  • Air Discharge and Exhaust Gas Channels
  • Pneumatic Conveyors
  • Filtration
  • Cyclones
  • Cooling and Drying Plants
  • Blower Performance Monitoring


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