Overview
The Belimo 22DT-52T is an active duct and immersion temperature sensor equipped with an 18-inch stainless steel probe. Designed for maximum insertion depth in large air ducts and piping, it outputs selectable voltage signals for precise temperature control.
Features
- Extra-long 18-inch stainless steel probe for deep duct cross-sections
- 8 onboard jumper-selectable temperature measuring ranges
- User-selectable 0…5 V or 0…10 V analog voltage output
- Weatherproof NEMA 4X / IP65 rated housing
- Suitable for liquid immersion when paired with thermowells
Specifications
- Probe Length: 18 inches [450 mm]
- Probe Diameter: 0.24 inches [6 mm]
- Output Signal: 0…5 V, 0…10 V (selectable)
- Supply Voltage: 24 V AC/DC
- Enclosure Rating: NEMA 4X / IP65
- Measured Value: Temperature
Applications
- Temperature sensing across deep duct cross-sections in large AHUs
- Hydronic system line temperature sensing with extended thermowells
- Industrial and commercial HVAC climate automation


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