Omega Products HX92AC User Manual
Relative Humidity Transmitter
Wall, Duct Mount, and Remote Probe Models
HX92A
†
Optional
U 4 to 20 mA or
0 to 1 V Output
U Compact Size for
Mounting Versatility
U Watertight Enclosure
U Accurate to 2.5% RH
The HX92A is an economical
humidity transmitter, providing
on-site continuous monitoring of
relative humidity. It is available with
either voltage or 2-wire current
output. The transmitter output is
linearized, and RH readings are
temperature compensated. A thinfilm polymer capacitor senses
relative humidity. The sensor is
protected by a stainless mesh-type
filter that is easily removable for
cleaning. The case has weathertight
protection, and screws are provided
for mounting the unit via internal
holes. An unusually low minimum
voltage of 6V allows the use of large
impedances for longer wire runs.
The HX93A is a similar unit that
provides transmitter outputs for both
humidity and temperature.
Specifications
Input Voltage Range:
24 Vdc nominal (6 to 30 Vdc)
Measuring Range RH: 3 to 95%
Temperature:
-20 to 75°C (-4 to 167°F)
HX92A wall mount.
HX92A9(*)-D duct mount shown.
HX90DM-KIT duct mount kit included
with each unit.
†
Refer to ordering chart on next page for NIST
calibration ordering information.
Relative Humidity
Control System
The HX92A and HX92A(*)-D Series
interface directly with OMEGA’s
iSeries meters and controllers to
create a complete relative humidity
control system.
iSeries meters and controllers feature
totally programmable color displays
and embedded internet connectivity.
See Section "M" for meters and "P" for
controllers.
DPi32 1⁄32 DIN temperature/process
meter shown actual size.
Hu-17
HX92A(*)-RP1 remote probe humidity
transmitter supplied with 1 m (3')
cable attached to a 124.5 mm (4.9")
stainless steel probe.
HX92A(*)-D duct mount.
Accuracy RH:
±2.5% RH from 20 to 80% RH;
±3.1% RH below 20 and above
80% RH @ 25°C with temp
coefficient of ±0.1% RH/°F
Output
HX92AC: 4 to 20 mA for
0 to 100% RH
HX92AV: 0 to 1 Vdc for
0 to 100% RH
RH Temperature Compensation:
-20 to 75°C (-4 to 167°F)
RH Time Constant
(90% Response at 25°C,
in Moving Air at 1m/s):
>10 seconds, 10 to 90% RH
>15 seconds, 90 to 10% RH
Repeatability: ±1% RH, 0.5°F
Housing: Polycarbonate plastic
watertight enclosure; meets NEMA 4X
specifications
All shown smaller
than actual size.
Connections: Liquid-tight
nylon with neoprene gland, for
2 to 7 mm (0.09 to 0.265") diameter
cable; internal 4-pin terminal block
accepts 14 to 22 gage wire
Dimensions
HX92A(*) and HX92A(*)-D Enclosure:
50 W x 65 L x 35 mm D
(1.97 x 2.56 x 1.38")
HX92A(*) Probe: 15.9 D x 56 mm
(0.625 x 2.2")
HX92A(*)-D Probe: 15.9 D x 127 mm
(0.625 x 5")
L
L
HX90DM-KIT duct mount kit.
HX92A wall mount.
H
u
Weight:
HX92A(*): 82 g (2.9 oz)
HX92A(*)-D: 100 g (3.5 oz)
To Order visit omega.com/hx92a for Pricing and Details
Model No. Description
HX92A(*) Wall mount relative humidity transmitter
HX92A(*)-D Duct mount relative humidity transmitter (includes HX90DM-KIT)
HX92A(*)-RP1 Remote probe RH transmitter (includes HX90DM-KIT)
HX92-CAL Calibration kit, 11 and 75% RH standards
PSR-24S Regulated power supply, US plug, 90 to 264 Vac input, 24 Vdc output, 400 mA, screw terminals, UL
PSR-24L Regulated power supply, US plug, 90 to 264 Vac input, 24 Vdc output, 400 mA, stripped leads, UL
PSR-24L-230 Regulated power supply, European plug, 230 Vac input, 24 Vdc output, 400 mA, stripped leads, CE
PSU-93 Unregulated power supply, 16 to 23 Vdc, 300 mA max, screw terminal
TX4-100 4-conductor shielded transmitter cable, 30 m (100')
CAL-3 -HU
HX90DM-KIT Duct mounting kit (for HX92A(*)-D or HX92A(*) -RP1 only)
For 4 to 20 mA output, specify “C” or for 0 to 1 Vdc output specify “V”.
*
Ordering Example: HX92AC, humidity transmitter with current output with HX92-CAL, calibration kit and PSU-93, power supply.
†
NIST-traceable calibration
Hu-18
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