Overview
The Belimo 01DTS-505X is a manual-reset freeze protection sensor (freezestat) with a 20-foot capillary tube. Designed for large HVAC coils, it triggers a manual lockout when freeze conditions are detected across its length.
Features
- Manual reset feature preventing automatic restart after a freeze trip
- Long 20-foot capillary sensing tube for extensive coil face protection
- SPDT safety contact for system shutdown or alarm signaling
- NEMA 4 / IP65 weather-resistant housing
Specifications
- Sensor Type: Low Temperature Detection (Freezestat)
- Reset Type: Manual reset
- Output: 1 x SPDT switch
- Capillary Length: 20 ft [6 m]
- Enclosure Rating: NEMA 4 / IP65
Applications
- Critical freeze protection in large commercial HVAC air handlers
- Safety low-limit tripping for heating/cooling coils requiring manual check



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