Siemens Pyrotronics DT-200CS Thermal Detector

The Siemens Pyrotronics DT-200CS Thermal Detector is a fixed‑temperature heat detector with a 200°F trip point, designed for use on conventional fire alarm circuits. This listing is supplied without an adapter plate, so installation requires an appropriate mounting accessory or plate sold separately. For 4-inch electrical boxes, an adapter ring/plate is required, and Siemens’ adapter plate assembly (P/N 500-618020) is available to simplify mounting in compatible enclosures. The DT-200CS is compatible with a wide range of fire alarm systems and can be used with circuits from different manufacturers, reflecting its heritage within the Pyrotronics/Siemens family of detectors. Electrical contacts are rated to connect up to 125 VAC at 5 A, with DC operation supported in the 6–25 VDC range, enabling reliable signaling to the control panel when heat is detected. This model sits among the DT‑135/DT‑200 CS/CL/WP variants and is commonly installed in commercial settings where fixed‑temperature heat detection is preferred over smoke sensing. As a legacy part, it has been discontinued by the manufacturer, so procurement typically comes through secondary distributors or remaining inventory.