The duct sensor is intended for use in sensing supply and return air temperature in HVAC applications. There are several sensor element ranges to choose from which to match all popular DDC systems. The sensor elements are precision thermistor or platinum film sensors with guranteed stability over time. The probes are epoxy sealed to guarantee moisture cannot migrate into the probe. Field calibration is not required. There are two standard probe lengths, 12 in and 8in long. Custom probe lengths, wire types and sensor elements are available for larger OEM projects. Ask about our plastics & metal manufacturing capabilities for custom housings as well.

• Thermistor Accuracy +/- 0.2C


• Platinum RTD Accuracy +/- 0.4C


• Thermistor range -70C to 150C


• Platinum RTD range -70C to 200C


• Probe Material Stainless steel


• Cable properties FT4, 80C, 600V

Installation:

• Insert the probe is well into the air steam in an area with no stratification or lo cal effects.
  
  


• A supply air sensor is located at any con venient location two or three meters down stream from the nearest fan and coil.
  
  


• A return temperature sensor can be mounted anywhere in the re turn duct, a meter or two before the mixing section usually.
  
  

To install the sensor, drill a 3/4” hole in the duct and insert the probe into the air stream. Secure the electrical box to the duct with two sheet -metal screws. The knockouts on the electrical box accept a 1/2” pipe or flex connector. The sensor requires two conductors, normally 18 ga unshielded wire, stranded.

Construction:

The sensor is a high quality unit manufactured to industrial standards. The probe material is stainless steel with a spin welded tip, not a separate welded plug as some probes in the HVAC industry use. The probes are baked and then epoxy sealed to eliminate long term moisture problems.