Overview
The Belimo 01HT-5A is a passive surface contact temperature sensor with a Pt100 platinum RTD element. It measures pipe wall temperature without requiring direct immersion into the fluid.
Features
- High-precision Pt100 RTD passive element
- Spring-loaded contact pin for reliable surface thermal conduction
- Included adjustable mounting strap fitting pipes up to 4.3 inches in diameter
- NEMA 4X / IP65 rated weather-resistant enclosure
Specifications
- Sensor Type: Pt100 RTD
- Mounting Type: Pipe contact / Strap-on
- Pipe Compatibility: Up to 4.3″ [110 mm] OD
- Enclosure Rating: NEMA 4X / IP65
- Measuring Range: -30°F to 195°F [-35°C to 90°C]
Applications
- Surface temperature monitoring of hot and chilled water supply/return pipes
- Non-intrusive hydronic temperature sensing in building management systems



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