Overview
The Belimo 01CT-5QL01 is a passive cable temperature sensor with a 4-inch stainless steel probe and NTC20k thermistor element, rated up to 75°C for standard HVAC duct temperature monitoring.
Features
- 4-inch stainless steel probe suitable for standard duct cross-sections
- Passive NTC20k thermistor sensing element
- Shielded plenum-rated cable providing noise rejection
- Durable stainless steel probe design
- 2-wire output for universal controller compatibility
Specifications
- Sensor Type: NTC20k Thermistor
- Measuring Range: -13°F to 167°F [-25°C to 75°C]
- Probe Length: 4 inches [100 mm]
- Probe Diameter: 0.24 inches [6 mm]
- Cable Length: 6.5 ft [2 m]
Applications
- Supply and return air duct temperature sensing in commercial HVAC
- Fan coil unit and air handler temperature regulation
- Pipe temperature sensing when paired with immersion thermowells



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