Dewpoint Transmitters
Chilled Mirror Technology
RHCM Series
Starts at
$
1421
†
Optional
⻬ No Routine
Calibration Needed
⻬ Minimum Drift
⻬ ±1°F Dewpoint Accuracy
⻬ 24 Vdc, 24 Vac, 115 Vac,
and 230 Vac Power
Available
⻬ RTD Simulator or
4 to 20 mA Output
Applications
⻬ HVAC/Energy
Management
⻬ Clean Rooms
⻬ Dry Rooms
⻬ Computer Rooms
⻬ Environmental
Laboratories
⻬ Semiconductor
Manufacturing
The RHCM Series is a family of
low-cost, high-performance chilled
mirror dewpoint transmitters.
The sensor provides accurate
long-term repeatability and high
reliability for process control and
energy management. The RHCM-10
sensor electronics are housed in a
rugged enclosure that can be wall
mounted for climate control. The
RHCM-20 and RHCM-30 sensors
are designed to be either pipe or
duct mounted for process control
in HVAC/energy management
applications. Field calibration is
not required and ambient
temperature effects, hysteresis,
and calibration drift with age are
all virtually eliminated.
The RHCM Series offers a wide
range of user-specified power inputs
including 24 Vdc, 24 Vac, 115 Vac,
and 230 Vac, encompassing many
applications. The user-specified
outputs include 100 Ω Platinum
RHCM-20 duct
mount, $1421
RHCM-30 pipe
mount, $1453
All models shown smaller than actual size.
RTD (4-wire) or 4 to 20 mA, which
can be scaled over 3 different
temperature ranges of 0 to 100°F,
0 to 50°C, and -40 to 140°F. Either
output can be directly connected to
a panel meter, controller, or data
acquisition system.
Specifications
Accuracy: ±1.0°F, max
Repeatability: ±1.0°F, max
Hysteresis: None
Response Time:
2-min, duct/pipe; 4-min, wall
Power: 24 ±6 Vdc @ 350 mA;
24 Vac @ ±10%; 115 Vac @ ±10%;
230 Vac @ ±10%
Power Consumption: 10 W max
Hu-53
RHCM-10 wall mount, $1575
RTD Output: 100 Ω Pt, 4-wire
Operating Range, Sensor:
-18 to 71°C (0 to 160°F)
Current Output: 4 to 20 mA, scaled
to range of 0 to 100°F, 0 to 50°C or
-40 to 140°F; all ranges also provide
1 to 5 Vdc using 250 Ω shunt
Operating Range, Housing:
0 to 50°C (32 to 120°F)
Flow Rate: 300 to 3000'
per minute (duct/pipe mount)
Max Pressure: 0 to 5 psig
Humidity: 10 to 90% RH @ 27°C (80°F)
Ship Weight: 4.55 kg (10 lb)
Dry Weight: 2.73 kg (6 lb)
† Refer to footnote on page Hu-54 for NIST
calibration ordering information.
104.14 (4.10) SQ. MAX
68.58
(2.70)
MAX
85.60
(3.37)
TYP
8.89
(0.350)
TYP
209.55
(8.25)
MAX
4.83
(0.19)
TYP
DUCT MOUNT
SENSOR
63.5 (2.5) MIN
to 101.6 (4.0) MAX
1 NPT
1" COMPRESSION
FITTING
AIR INLET
OPENINGS
25.4
(1.00)
MAX
SENSOR
SPONGE GASKET
DUCT MOUNTING PLATE
107.95
(4.25)
MAX
152.4 (6.00) MAX
}
PIPE MOUNT SENSOR
25.4
(1.00)
DIA.
MAX
HIGH DIMPLE
ON "B" HOLES
METAL BASE
PLASTIC COVER
(FIRE-RETARDANT ABS)
AIR THERMOMETER &
SHIELD (OPTIONAL)
SAMPLE AI R
INTAKE PORT
10.16
(0.40)
MIN.
166.37
(6.55)
SAMPLE AIR
OUTLET PORT
(1.0") MIN
CLEARANCE
REQUIRED
120.65
(4.75)
66.04
(2.6)
MAX
25.4
(1.0) DIA.
86.36
(3.40)
2.54 (0.10)
RHCM-20 and RHCM-30
Dimensions: mm (in)
RHCM-10 Dimensions: mm (in)
H
u
Output Options
Order Code Add’l Price Output (Scale)
PT100 N/C 100 Ω RTD
100F $167 4 to 20 mA (0 to 100°F)
50C 167 4 to 20 mA (0 to 50°C)
140F 167 4 to 20 mA (-40 to 140°F)
To Order
Model No. Price Description
RHCM-10-(*)-(**) $1575 Wall mount dewpoint transmitter
RHCM-10T-(*)-(**)-(***) 1803 Wall mount dewpoint/temperature transmitter
RHCM-20-(*)-(**) 1421 Duct mount dewpoint transmitter
RHCM-30-(*)-(**) 1453 Pipe mount dewpoint transmitter
TX4-100 35 4 conductor shielded transmitter cable, 30 m (100')
CAL-3-HU
PSR-24S 60 Regulated power supply, US plug, 90 to 264 Vac input, 24 Vdc output, 400 mA, screw terminals, UL
PSR-24L 60 Regulated power supply, US plug, 90 to 264 Vac input, 24 Vdc output, 400 mA, stripped leads, UL
PSR-24L-230 60 Regulated power supply, European plug, 230 Vac input, 24 Vdc output, 400 mA, stripped leads, CE
PSU-93 40 Unregulated power supply, 16 to 23 Vdc, 300 mA max, screw terminal
Comes complete with operator’s manual.
Insert power code from power supply options chart (1, 2, 3 or 4).
*
Insert output code for dewpoint range from the output options chart (PT100, 100F, 50C or 140F).
**
Insert second output code for ambient temperature output from the output options chart (PT100, 100F, 50C or 140F).
***
Ordering Examples: RHCM-10T-1-50C-50C, dewpoint/temperature transmitter with 24 Vdc power, a dew point output of 4 to 20 mA
(0 to 50°C) and an ambient temperature output of 4 to 20 mA = 0 to 50°C with CAL-3-HU, NIST-traceable calibration,
$1803 + 167 + 167 + 125 = $2262.
RHCM-10-1-PT100, dewpoint/temperature transmitter with 24 Vdc power, a dew point output of 100 Ω RTD, $1575.
(Specify Model Number)
†
125 NIST-traceable calibration
Power Supply Options
Order Code Add’l Price Description
1 N/C 24 Vdc
2 $182 24 Vac
3 182 115 Vac
4 182 230 Vac
MOST POPULAR MODEL HIGHLIGHTED!
Hu-54
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