Pic Gauges B3S12-RR Bimetal Thermostat 3" Dial 50/550°F/C 12" Stem

Bimetal thermostat with 12" stem

This bimetal thermostat measures temperature from 50 to 550 degrees in both Fahrenheit and Celsius. A three-inch dial provides a clear readout for HVAC technicians and maintenance staff. The 12-inch stem reaches into ducts, tanks or process vessels where shorter probes cannot. It suits professionals who need direct local indication without external power.

Mechanical limits of bimetal sensing

Bimetal elements respond more slowly than electronic sensors and cannot transmit a signal to a controller. The fixed 50 to 550 degree range cannot be recalibrated in the field. Accuracy is limited by the mechanical linkage between the coil and the pointer. Users who need data logging, alarms or tighter tolerance must choose a different technology.

Transparent case and stem mounting

The transparent housing lets you verify pointer movement and spot condensation at a glance. A 12-inch stem threads into standard fittings so installation follows familiar HVAC practice. The rugged bimetal coil resists vibration better than glass thermometers. Buyers who need a flush-panel mount or a shorter insertion length will need another model.