Overview
The Belimo 01DT-5BL is a passive duct/immersion temperature sensor built for accurate temperature monitoring in commercial HVAC systems. Equipped with a Pt1000 element and a 4-inch (100 mm) stainless steel probe, it provides reliable performance in air and liquid lines.
Features
- Passive Pt1000 temperature sensing element for stable readings
- 4-inch (100 mm) probe suitable for standard duct and pipe applications
- Weatherproof IP65 / NEMA 4X rated enclosure
- Simple installation with spring-loaded terminal block connections
- Dual application for air ducts or liquid immersion with thermowell
Specifications
- Sensor Element: Pt1000
- 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
- Duct air temperature measurement in HVAC distribution systems
- Fluid temperature monitoring in heating and cooling pipe loops
- Climate control sensing for building management controllers


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