C437F1045 Honeywell Pressure Switch, Auto Recycle, 1 in. wc to 26 in. wc
Use C437 for SPST Mercury switching.
Compensate for momentary surges in gas pressure with a restrictive orifice in inlet pressure channel on the models with pressure range of 1 to 26 in. wc (0.25 to 6.5 kPa).
Impede tampering and provide dust-resistant operation with enclosed setting.
Increase strength of control diaphragm with Buna-N fiber-reinforced material.
Clear glass cover allows observation of interior mechanism to aid in setting and checkout.
Mercury switch provides visual indication of switch position.
Application Industrial gas system applications for safety shutoff, pressure control, or differential-pressure control.
Operating Range (psi) 1 to 26 in. wc
Operating Range (kPa) 0.5 to 7.0 kPa
Switch Operation Auto recycle
Switching Action SPST (two), break one and make one on pressure fall
Sensor Element BUNA N Diaphragm
Materials (Case) Die-cast aluminum
Pipe Connections, Main or High Pressure 1/2 in. NPT internal thread
Pipe Connections, Vent or Low pressure 1/8 in. NPT internal thread
Dimensions (in.) 7 3/4 in. high x 6 1/4 in. wide x 3 7/16 in. deep
Dimensions (mm) 197 mm high x 159 mm wide x 87 mm deep
Switch Contact Ratings (120 Vac) 8.0 AFL, 48.0 ALR, 10.0 A resistive
Switch Contact Ratings (120 Vdc) 2.0 AFL, 20.0 ALR, 8.0 A resistive
Switch Contact Ratings (240 Vac) 5.1 AFL, 30.6 ALR, 5.0 A resistive
Switch Contact Ratings (240 Vdc) 1.0 AFL, 10.0 ALR, 4.0 A resistive
Maximum Sustained Operating Pressure (psi) 5.0 psi
Maximum Sustained Operating Pressure (kPa) 34.5 kPa
Pressure Differential (psi) 1 1/4 in. wc
Pressure Differential (kPa) 0.31 kPa
Differential Type Additive
Temperature Range (F) 32 F to 125 F
Temperature Range © 0 C to 52 C
Maximum Ambient Temperature (F) 125 F
Maximum Ambient Temperature © 52 C
Electrical Connections Screw terminals
Approvals, Underwriters Laboratories Inc Listed: File No. MP2168, Guide No. MFHX
Approvals, Canadian Standards Association Certified: File No. LR1620, Guide No. 380-W-1.16
Approvals, Factory Mutual Approved: Report No. 22018, 24127, J.I.IF4A3.AF
Approvals, Industrial Risk Insurers Acceptable
Includes Weatherproof enclosure (NEMA 3R)
*Photo is representative only