HT-69020NP-0, HT-69030NP-0 Duct Probe RH
Transmitter Installation Guide
Introduction
The HT-69 Series Duct Probe Relative Humidity (RH)
Transmitters use a highly accurate and reliable thermoset
polymer-based capacitance humidity sensor and state-of-
the-art digital linearization and temperature-compensated
circuitry to monitor humidity levels in a duct. The humidity
sensor is encapsulated in a 60 micron HDPE filter at the
end of a 9 in. (230 mm) stainless steel (S/S) probe and a
compact enclosure.
WARNING
Read these instructions carefully before you install and
commission the humidity transmitter. Failure to follow
these instructions may result in product damage. Do
not use in an explosive or hazardous environment,
with combustible or flammable gases, as a safety or
emergency stop device, or in any other application
where failure of the product could result in personal
injury. Take electrostatic discharge precautions during
installation and do not exceed the device ratings.
Figure 1: HT-69 Duct Probe RH Transmitter
Dimensions
Figure 2: Dimensions of the HT-69 Duct Probe RH
Transmitter
Callout Description
A 60 micron HDPE filter
B 304 series S/S probe
C Foam gasket
D 0.5 in. (12.7 mm) NPT
*241102556A*
Part No. 24-11025-56 Rev. A
2022-11-11
(barcode for factory use only)
HT-69020NP-0, HT-69030NP-0
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