the White-Rodgers 3L03-190 is the industrial standard for HVAC temperature regulation and safety

preventing thermal degradation of the copper shielding

While it comes with a 0

this specific model features solid copper solder ODF connectors

and is used extensively in boilers

Rheem-Ruud 47-41884-01 Limit Switch the White-Rodgers 3L03-190 is theThe Rheem Ruud 47 41884 01 Limit Switch is a critical safety component designed for high pressure monitoring in residential and commercial HVAC systems. This manual reset pressure switch features a 1 4 inch sweat connection, engineered to interrupt the electrical circuit when system pressures exceed the 440 PSI open setpoint. Operating as a normally closed SPST switch, it provides a vital failsafe by preventing compressor operation or system cycling