Overview
The Belimo 01HT-5Q is a passive pipe contact temperature sensor with an NTC20k thermistor element. It provides simple, surface-mounted pipe temperature measurements for HVAC automation systems.
Features
- Passive NTC20k thermistor element
- Spring-loaded contact pin ensuring fast thermal response from pipe wall
- Included strap for mounting on pipes up to 4.3 inches in diameter
- Rugged NEMA 4X / IP65 enclosure for indoor and outdoor environments
Specifications
- Sensor Type: NTC20k
- 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
- Water pipe surface temperature monitoring in commercial HVAC installations
- Non-invasive fluid temperature detection in automated piping loops



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