Honeywell C437 2000 Series Manual Gas/Air Pressure Switches
2000 Series Manual Gas/Air Pressure Switches
C437
Pressure or differential pressure limit controls for industrial gas systems.
• Use C437 for SPST 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). Resume operation by manually resetting when using lockout application models.
• 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.
Select a link under the "item" tab below to order.
| Cat # | Pressure Differential (psi) | Switching Action | Maximum Sustained Operating Pressure (psi) | Operating Pressure Range (psi) |
| C437D2003 | 1 3/4 in. wc | SPST, break on rise, non-mercury | 5.0 psi | 1 to 26 in. wc |
| C437D2011 | 1/2 psi | SPST, break on rise, non-mercury | 15.0 psi | 1/2 to 5 psi |
| C437D2029 | 1 psi | SPST, break on rise, non-mercury | 30.0 psi | 1 to 10 psi |
| C437E2002 | 1 3/4 in. wc | SPST, break on rise, non-mercury | 5.0 psi | 1 to 26 in. wc |
| C437E2010 | 1/2 psi | SPST, break on rise, non-mercury | 15.0 psi | 1/2 to 5 psi |
| C437E2028 | 1 psi | SPST, break on rise, non-mercury | 30.0 psi | 1 to 10 psi |
| C437E2036 | 0.25 in. wc | SPST, break on rise, non-mercury | 3.0 psi | 0.5 to 5.5 in. wc |
| Application | Industrial gas system applications for safety shutoff, pressure control, or differential-pressure control. | |
| Pipe Connections, Main or High Pressure | 1/2 in. NPT internal thread | |
| Pipe Connections, Vent or Low pressure | 1/8 in. NPT internal thread | |
| Electrical Connections | Screw terminals | |
| Sensor Element | BUNA N Diaphragm | |
| Differential Type | Subtractive | |
| Switch Operation | Manual Reset | |
| Switch Contact Ratings | (120 Vac) | 8.0 AFL, 48.0 ALR, 10.0 A resistive |
| (120 Vdc) | 2.4 AFL, 24.0 ALR, 5.0 A resistive | |
| (240 Vac) | 5.1 AFL, 30.6 ALR, 5.0 A resistive | |
| (240 Vdc) | 1.2 AFL, 12.0 ALR, 2.0 A resistive | |
| Temperature Range | 32 F to 125 F (0 C to 52 C) | |
| Maximum Ambient Temperature | 125 F (52 C) | |
| Materials (Case) | Die-cast aluminum | |
| Approvals | ||
| Canadian Standards Association | Certified: File No. LR1620, Guide No. 380-W-1.16 | |
| Factory Mutual | Approved: Report No. 22018, 24127, J.I.IF4A3.AF | |
| Underwriters Laboratories Inc. Listed | File No. MP2168, Guide No. MFHX | |
