Honeywell C437D2003 Pressure Switch

Honeywell C437D2003 Pressure Switch. The C437D,E Series 2000 Gas Pressure Switches are pressure-actuated switching devices used in industrial gas system applications for safety shutoff, pressure control, and differential-pressure control. All Series 2000 models have MicroSwitch™ snap switches to open or close a circuit on pressure rise or drop. Use C437 for SPST (non-mercury) switching. Models intended for lockout applications must be manually reset before resuming operation. Models with pressure range of 1 to 26 in. wc (0.25 to 6.5 kPa)compensate for momentary surges in gas pressure with a restrictive orifice in inlet pressure channel. Impede tampering and provide dust-resistant operation with enclosed setting. Increase strength of control diaphragm with Buna N fiber-reinforced material. Two Buna-N fiber-reinforced seal-off diaphragms for added reliability. Clear glass cover allows observation of interior mechanism to aid in setting and checkout. Replaces: C437D1005 and C437F1003