Overview
The Belimo 01DT-5LL is a passive duct/immersion temperature sensor featuring an NTC10k (10k2) thermistor and a 4-inch (100 mm) probe. It delivers precise, dependable temperature readings across typical commercial HVAC air ducts and hydronic lines.
Features
- NTC10k (10k2) passive thermistor element
- 4-inch (100 mm) probe length for standard duct insertion
- IP65 / NEMA 4X weatherproof enclosure rating
- Tool-free spring terminals for fast electrical connections
- Suitable for air duct installation or thermowell immersion
Specifications
- Sensor Element: NTC10k (Type 2 / 10k2)
- Probe Length: 4″ [100 mm]
- Probe Diameter: 0.24″ [6 mm]
- Output Signal: Passive resistance
- Enclosure Rating: IP65, NEMA 4X
- Measuring Range: -40°F to 302°F [-40°C to 150°C]
Applications
- Supply and return duct air temperature sensing
- Chilled and hot water line temperature measurement
- Compatibility with wide-ranging 10k2 thermistor BAS controllers


Reviews
There are no reviews yet.