The Series RHP-E/N Wall Mount Humidity/Temperature/Dew Point Transmitter is the most
versatile room transmitter on the market. The stylish housing is well vented to provide air ow across
the sensor to improve measurement accuracy. The humidity and the dew point are measured using
a capacitive polymer sensor that completely recovers from 100% saturation. The humidity and dew
point can have either a current or voltage output, while the optional temperature output can be a
current, voltage, RTD, or thermistor. For models with current or voltage for the temperature output,
the temperature range is eld selectable.
• Reduced installation cost with combined humidity/dew point and temperature sensing
• Wide application environments from a large selection of temperature sensors and 2% and 3% accuracies
•Reducedinventorywitheldselectableoutput
• Air economizers
• Room comfort monitoring
• Greenhouse monitoring
BENEFITS/FEATURES
DESCRIPTIONAPPLICATIONS
SERIES RHP-E/N | HUMIDITY/TEMPERATURE/DEW POINT TRANSMITTER
®
SPECIFICATIONS
Relative Humidity Range 0 to 100% RH.
Temperature Range -40 to 140°F (-40 to 60°C) for thermistor and RTD sensors; -20 to 140°F (-28.9 to 60°C) for analog outputs.
Dew Point Temperature
Range
-20 to 140°F (-28.9 to 60°C); 0 to 100°F (-17.8 to 37.8°C); 40 to 90°F (4.4 to 32.3°C); -4 to 140°F (-20 to 60°C) eld
selectable ranges.
Accuracy RH: Model RHP-2XXX: ±2% (10 to 90% RH @ 25°C), Model RHP-3XXX: ±3% (20 to 80% RH @ 25°C), Model
RHP-5XXX: ±5% (20 to 80% RH @ 25°C); Thermistor temperature sensor: ±0.36°F @ 77°F (±0.2°C @ 25°C); RTD
temperature sensor: DIN Class B, ±0.54°F @ 32°F (±0.3°C @ 0°C); Analog outputs: ±0.9°F @ 77°F (±0.3°C @ 25°C).
Hysteresis ±0.8%.
Repeatability ±0.1% typical.
Temperature Limits Operating: -40 to 140°F (-40 to 60°C); Storage: -40 to 176°F (-40 to 80°C).
Compensated Temperature
Limits
-4 to 140°F (-20 to 60°C).
Power Requirements 4-20 mA loop powered outputs: 10-35 VDC; 0-5/10V outputs: 15-35 VDC or 15-29 VAC.
Output Signals 4-20 mA loop powered outputs: 4-20 mA, 2 channels for humidity/solid state temperature sensor models (loop powered
on RH). Switch selectable RH/dew point. Switch selectable normal or reverse output; 0-5/10V outputs: 5 mA max., 2
channels for humidity/solid state temperature sensor models. Switch selectable 0-10 V/2-10 V or 0-5 V/1-5 V output.
Switch selectable RH/dew point. Switch selectable normal or reverse output.
Solid State Band Gap
Temperature Sensor
Output Ranges
Switch selectable, -20 to 140°F (-28.9 to 60°C); 0 to 100°F (-17.8 to 37.8°C); 40 to 90°C (4.4 to 32.3°C); -4 to 140°F
(-20 to 60°C).
Response Time 8 s.
Electrical Connections Screw terminal block.
Drift <0.25% RH/year.
RH Sensor Capacitance polymer.
Enclosure Material White polycarbonate (European); Warm gray polycarbonate (North American).
Enclosure Rating IP20.
Display Optional LCD; Switch selectable %RH or dew point, °F/°C.
Display Resolution RH: 1%; Temp: 0.1°F (0.1°C); Dew Point: 1°F (1°C).
Weight 4.4 oz (125 g).
Agency Approvals CE.
European style
North American style
©Copyright 2021 Dwyer Instruments, Inc.
Printed in U.S.A. 7/21 DS-RHP-EN Rev. 4
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DWYER INSTRUMENTS, INC.
Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identied in this publication without notice. Dwyer advises its customers to obtain the
latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.
DIMENSIONS
WIRING DIAGRAM
HOW TO ORDER
SERIES
RHP: Wall mount
RH/temp/DP transmitter
ACCURACY
-2: 2%
-3: 3%
-5: 5%
MOUNTING TYPE
E: European
N: North American
RH OUTPUT
4: IV combo 4-20 mA / 0-10 V
TEMPERATURE SENSOR/OUTPUT TYPE
0: None
4: IV combo 4-20 mA / 0-10 V
A: 10K Ω thermal curve A
B: 10K Ω thermal curve B
C: 3K Ω thermal curve C
D: 100 Ω RTD
E: 1K Ω RTD
F: 20K Ω thermal curve F
OPTIONS
-COC: Certicate of calibration
-FC: Factory calibration certicate
-LCD: Liquid crystal display
-NIST: NIST traceable calibration certicate
ERHP 4-2 0 -COC
Use the bold characters from the chart below to construct a product code.
ACCESSORIES
Model Description
A-449
SCD-PS
Remote LCD display
100-240 VAC/VDC to 24 VDC power supply
+ -
+ -
+
+
-
-
+
+
-
-
POWER
SUPPLY
TEMP RECEIVER
4-20 mA
RH RECEIVER
4-20 mA
PASSIVE TEMP.
SENSOR
(IF PRESENT)
+ -
+ -
+
+
-
-
+
+
-
-
RH RECEIVER
0-5 V OR 0-10 V
POWER
SUPPLY
TEMP RECEIVER
0-5 V OR 0-10 V
PASSIVE TEMP.
SENSOR
(IF PRESENT)
3.000
[76.20]
.552
[14.02]
2x .176
[4.47]
.573
[14.56]
.33
[8.38]
3x .37
[9.36]
3x .15
[3.87
]
1.18
[30]
1.16
[29.39]
1.08
[27.33]
1.10
[27.96]
4.50
[114.30]
2.80
[71.12]
3.65
[92.72]
3.56
[90.42]
Current models
Voltage models