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the SPST (Single-Pole Single-Throw) contacts lock open and require a physical technician intervention to resume operation
this switch meets rigorous safety standards for combustion air proving and industrial safety interlock applications
preventing the system from operating outside of design parameters
providing the precise pressure drop required for efficient heat transfer
Johnson Controls T-4100-1 Thermostat Els PW 17895 the SPST (Single-Pole Single-Throw) contactsThe Johnson Controls T 4100 1 is a professional grade single temperature pneumatic thermostat engineered for precise proportional control of industrial and commercial HVAC systems. This direct acting pneumatic thermostat features a low volume output design, making it a reliable drop in replacement for legacy pneumatic control systems. Operating within a dial range of 55 to 85? F, the T 4100 1 is optimized for vertical mount thermostat configurations