Belimo 01DT-5ML Temp Sensor

The Belimo 01DT-5ML is a passive NTC10k3 duct temperature sensor designed for high-accuracy thermal monitoring in HVAC air and water applications. Featuring a 4" stainless steel probe with a 0.24" diameter, this sensor provides a reliable resistance signal to building automation systems (BAS) and controllers from brands like Tridium, Carrier, and York. Built with a NEMA 4X / IP65 rated enclosure, the unit is protected against moisture and dust, making it suitable for demanding mechanical environments and plenum-rated installations per UL 2043 requirements.

For technical efficiency, the sensor utilizes a 10k Type III thermistor (Precon) which offers a stable resistance curve and an accuracy of ±0.35°F at 77°F. The duct immersion sensor includes a removable spring-loaded terminal block for simplified field wiring and a 1/2" NPT conduit adapter for secure mounting. Whether integrated into an air duct or installed within a stainless steel thermowell for pipe sensing, this passive temperature sensor ensures precision without the need for an external power supply.

Key Benefits

• High-Durability Build: Features a 4-inch stainless steel probe and a rugged Lexan housing to withstand vibration and harsh airflow.
• Versatile Mounting: Optimized for both air duct applications and hydronic pipe sensing when paired with a compatible thermowell.
• Environmental Protection: NEMA 4X and IP65 certification ensures performance in high-humidity or wash-down areas.
• Easy Installation: Equipped with a pluggable spring-loaded terminal block for fast, reliable electrical connections.
• Passive Reliability: Operates as a resistance-based 10k Type 3 thermistor requiring no active power source, reducing points of failure.

Common Questions

Is the 01DT-5ML compatible with my existing BAS controller?
This sensor features a standard NTC10k3 (Type III) output, which is natively supported by most major HVAC control platforms, including Tridium, KMC, and Andover.

Can I use this sensor in a hydronic pipe application?
Yes, while commonly used in ducts, the 01DT-5ML is designed for immersion use. We recommend installing it with a brass or stainless steel thermowell to protect the probe and prevent leaks.

Does this unit come with mounting hardware?
The package typically includes a mounting clip, screws, adhesive foil, and a 1/2" NPT conduit adapter for standard installation workflows.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.