Honeywell L408J1017 Vaporstat Controller 0-4 psi

This Honeywell product provides operating control and automatic high limit protection for vapor heating systems with pressures up to 4 psi (8 kPa). All models have Microswitch snap switches to open or close a circuit on a pressure rise. There is a stainless steel diaphragm for use with liquids, air, noncombustible gases, ammonia, oxygen, distilled water and similar media. Provides SPDT switching and a clear plastic cover allows observation of the pressure settings. Mount using hexagonal fitting with 1/4 in. NPT internal threads for direct mounting to the steel or brass Steam Trap (siphon loop). Ground Screw terminal.