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HE-69xx0NP Duct Probe Humidity Element with Temperature Sensor Installation Guide

Product name
HE-69xx0NP Series
Document type
Installation Guide
Document revision
Revision date
Important: To avoid damage to the circuit board and components, do not mount the unit in a location where high concentrations of corrosive vapors are present.

Place the Duct Probe Humidity Element in a location that complies with these guidelines:

  • Position: designed for duct mounting in any position, except with the probe tip pointed up.
  • Duct diameter: the minimum diameter for round ducts is 12 in. (305 mm) and the minimum width for square ducts is 12 in. (305 mm).
  • For air stratification, when the unit is mounted on the discharge side of the fan, ensure that the location is at least 8 ft (2.4 m) downstream from the humidification equipment, where duct air and water vapor are sufficiently mixed. Avoid areas where the probe is exposed to condensation.