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VS94 Shock and Vibration Control Switch

VS94 Series Vibration Control Switch

VS94 Series is an electro-mechanical device designed to protect equipment from damag- ing shock or vibration. This sensitive mech- anism can detect excessive shock or vibration and shutdown the equipment before further damage occurs. A set of contacts is held in a latched position through a magnetic latch mechanism.

As the level of shock or vibration increases an inertia mass exerts force against the latch arm and forces it away from the magnetic latch causing the latch arm to separate and to operate the contacts. Sensitivity is obtained by adjusting the amount of air gap between the magnet and latch arm plate.

The VS94 Series is housed in a NEMA 4/4X glass filled polyester enclosure and has a base mount. It is for applications in non-haz- ardous locations.

VS94 models are rated up to 480 VAC.

Applications for the VS94 include all stationary types of machinery or equipment where excessive shock/vibration can be damaging or poses a threat to normal operations such as in:
  • Cooling fans
  • Engines
  • Pump jacks
  • Compressors
  • Pumps
  • Rotating and Reciprocating Machinery


  • Electromechanical Design
  • Detects Shock or Vibration in Three Planes of Motion
  • NEMA 4/4X (CSA types 4 and 12) Weather-proof Enclosure
  • Reliable Magnetic Latch Feature
  • Micro Fine, Easy-to-Adjust Sensitivity Adjustment
  • Manual Reset (Standard)
  • Remote Reset (Optional)
  • Adjustable Start-up Time Delay (Optional)
  • Space Heater Circuit to Prevent Housing Moisture Condensation (Optional)
  • Two (2) versatile SPDT snap-switches rated up to 480 VAC.


Remote Reset
This option of the VS94 includes a built-in electric solenoid which allows reset of tripped unit from a remote location. Available for 115 VAC or 24 VDC.

Time Delay
Overrides trip operation on start-up. The time delay option is field-adjustable from 5 seconds up to 6-1/2 minutes with an easy-to-adjust 20-turn potentiometer. Available for 115 VAC or 24 VDC.

Space Heater
This optional circuit prevents moisture con- densation inside the VS94 housing.

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