Product Description

21CX4 picture
Representative picture


Honeywell Microswitch

21CX4 is an explosion proof limit switch

Datasheet #1: 21CX4 PDF
Datasheet #2: 21CX4 PDF


MICRO SWITCH™ CX switches are built especially for outdoor use in hazardous atmospheres. These enclosures are constructed to withstand the pressure of an internal explosion. Flame paths cool the exploded gases to a point less than the lowest safe operating temperature of the surrounding gas.


  • Sealing - applicable portions of NEMA 1, 3, 4, 4X, 6, 6P, 7, 9, and 13
  • Watertight and dust-tight for outdoor use
  • 4 mA to 20 mA analog output available
  • UL Listed, file #E14274
  • Analog UL file #E68247
  • CSA Certified, file #LR57324
  • Rugged, cast aluminum housing
  • Pretravel, overtravel, and actuating sequence can be field adjusted without tools (all basics individually)
  • Rotary types convert in seconds to clockwise, counter-clockwise, or both-way operation

Typical Applications

  • Control valves and actuators
  • Petro-chemical plants
  • Grain handling
  • Waste treatment
  • Hazardous waste handing
  • Power generating
  • Paint facilities

Pricing & Availibility

Price: $2708.16

1 available to buy (in stock)