Siemens 134-1504W Temperature Control Thermostat

Siemens 134-1504W Temperature Control Thermostat is an electric low-temperature detection thermostat from Siemens Building Technologies that provides a cut-out and alarm function to protect refrigeration and freezing equipment when the sensed temperature falls below the setpoint. It uses a remote bulb sensor and a manual reset; after tripping, the unit must be reset manually, and the reset on the rear reloads factory settings for consistent operation. The model range is 15 to 55 °F (−9.4 to 12.8 °C), and it is available in a 4-wire configuration. Common applications include walk-in coolers, freezers, and other cold-storage equipment where low-temperature protection and alerting are required. The 134-1504 family is referenced in Siemens catalogs as the Electric Low Temperature Detection, Cut-out and Alarm Thermostat, Manual Reset, and is widely listed by distributors under the 134 Low Temperature Series.