Overview
The Belimo 01DT-5QL is a passive duct and immersion temperature sensor featuring a 4-inch probe and NTC20k thermistor. It is engineered for accurate temperature sensing in standard air ducts and water pipes.
Features
- Passive NTC20k thermistor sensing element
- 4-inch stainless steel probe for small-to-medium ductwork and thermowells
- Weather-tight NEMA 4X / IP65 housing
- Tool-free spring terminal connections for easy wiring
Specifications
- Sensor Type: NTC20k
- Probe Length: 4″ [100 mm]
- Probe Diameter: 0.24″ [6 mm]
- Enclosure Rating: NEMA 4X / IP65
- Measuring Range: -60°F to 300°F [-50°C to 150°C]
Applications
- Supply and return air temperature sensing in branch ductwork
- Pipe immersion temperature measurement using standard 4-inch thermowells


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