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Honeywell C645B1013

Honeywell C645B Pressure Switch, 0.7 - 5.2 kPa, 0.2 kPa Differential, SPDT, -20 to 125 deg F, Zinc Plated Housing


Manufacturer part number:




Honeywell C645B Pressure Switch, 0.7 - 5.2 kPa, 0.2 kPa Differential, 34.5 kPa Maximum, SPDT, 1/4 Inch FNPT For Main Or High Pressure, 1/8 Inch FNPT For Venting Or Low Pressure, -20 to 125 deg F, Buna-N Fiber-Reinforced Diaphragm, Zinc Plated Housing, 3-1/2 Inch D, Includes: 137637C Cover Window

  • Spring loaded diaphragm actuates snap-acting micro switch
  • Switch can be wired to turn on alarm
  • Break control circuit on pressure rise
  • Lockout and manual reset optional in A and C models
  • Removable, zinc plated cover protects scaleplate and adjusting screw
  • Lockout models have external manual reset lever
  • Pipe tappings allow selection of positive pressure differential pressure or venting connections
  • Two seal off diaphragms for added reliability

Standard/Approvals: CSA File No LR1620, UL File No MP2168

Application: Air, LP and Natural Gas

Products specifications
Attribute nameAttribute value
Contact FormSPDT
Diaphragm MaterialBuna-N Fiber-Reinforced
Differential0.2 kPa
Dimensions3-1/2 Inch D
Housing MaterialZinc Plated
Maximum Pressure34.5 kPa
Pressure Range0.7 - 5.2 kPa