Hu-53 

# Dewpoint Transmitters Chilled Mirror Technology

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 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 

### No Routine Calibration Needed Minimum Drift ±1°F Dewpoint Accuracy 24 Vdc, 24 Vac, 115 Vac, and 230 Vac Power Available RTD Simulator or 4 to 20 mA Output



### Applications HVAC/Energy Management Clean Rooms Dry Rooms Computer Rooms
Environmental Laboratories Semiconductor Manufacturing 

### RHCM Series Starts at 

# $ 

# 1421

RHCM-20 duct mount, $1421

RHCM-30 pipe mount, $1453

RHCM-10 wall mount, $1575 All models shown smaller than actual size.

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. Optional †Hu-54 

# H u

To Order (Specify Model Number)

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 † 125 NIST-traceable calibration
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 Order Code Add’l Price Description

1 N/C 24 Vdc

2 $182 24 Vac

3 182 115 Vac

4 182 230 Vac 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)

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. 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 AIR 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)

Power Supply Options Output Options RHCM-10 Dimensions: mm (in)



### MOST POPULAR MODEL HIGHLIGHTED! RHCM-20 and RHCM-30

Dimensions: mm (in)

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