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®
SERIES RHP | HUMIDITY/TEMPERATURE TRANSMITTERS
Duct mount
OSA (outside air)
with radiation shield
OSA (outside air)
with sintered lter
(outside air)
FEATURES/BENEFITS
• Reduced installation cost with combined humidity and temperature
• Wide application environment from a large selection of temperature sensors and 2%, 3% and 5% accuracies
• Reduced system operating costs with radiation shield protecting the sensor from radiant heat
DESCRIPTIONAPPLICATIONS
• Air economizers
• Outdoor temperature and relative humidity reference for building systems
The Series RHP Humidity/Temperature Transmitters combine the
voltage or current humidity transmitter output with a passive temperature
thermistor or RTD output. The polymer capacitance humidity sensor
reduces longterm affect of condensation, fog, or high humidity. The
humidity sensors are available with 2%, 3% or 5% accuracies. Duct
mounted transmitters are available with an optional two-line alpha
numeric LCD display.
SPECIFICATIONS
Relative Humidity Range 0 to 100% RH.
Temperature Range -40 to 140°F (-40 to 60°C).
Accuracy, RH RHP-2XXX ±2% 10-90% RH @ 25°C; RHP-3XXX ±3% 20-80% RH @ 25°C; RHP-5XXX ±5% 20-80% RH @
25°C.
Accuracy, Thermistor Temp Sensor ±0.2°C @ 25°C (±0.36°F @ 77°F).
Accuracy, RTD Temp Sensor DIN Class B; ±0.3°C @ 0°C (±0.54°F @ 32°F).
Accuracy, Solid State Band Gap ±0.9°F @ 77°F (±0.5°C @ 25°C).
Hysteresis ±1%.
Repeatability ±0.1% typical.
Temperature Limits -40 to 140°F (-40 to 60°C).
Storage Temperature -40 to 176°F (-40 to 80°C).
Compensated Temperature Range -4 to 140°F (-20 to 60°C).
Power Requirements 4-20 mA loop powered models: 10-35 VDC; 0-5/10 V output models: 15-35 VDC or 15-29 VAC.
Output Signal
(Model Dependent)
Response Time 15 s.
Electrical Connections Removable screw terminal block.
Conduit Connection Duct mount: 1/2˝ NPS; OSA: PG11 or PG16 (1/2˝ conduit) knockouts.
RH Sensor Capacitance polymer.
Temperature Sensor Types 1, 2, 3: Solid state band gap; Curves A, B, C: Thermistor; Curves D, E: Platinum RTD DIN 385.
Enclosure Material Duct mount sensor tube: PVC-UL 94 V-0; Duct mount sensor cap: Polycarbonate ABS blend-greater than UL
Enclosure Rating Duct mount: NEMA 4X (IP66) for housing only; OSA: NEMA 4X (IP66).
Display Duct mount only, optional 2-line alpha numeric, 8 characters/line.
Display Resolution RH: 0.1%; 0.1°F (0.1°C).
Weight Duct mount: .616 lb (.3 kg); OSA: 1 lb (.45 kg).
Compliance CE.
4-20 mA; 0-5/10V @ 5 mA max.
Drift < 1% RH/year.
94 V-0; Duct mount electronics housing and cover: Makrolon
®
polycarbonate-UL 94V-HB; OSA: Polycarbonate.
OSA
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DIMENSIONS
6-25/32
[172.09]
5-1/8
[21.83]
[21.83]
[67.07]
5-1/8
2-1
3-1
[3] 3/16 [4.76] HOLES
5 [104.52] BC
[130.18]
OSA (outside air) with sintered lter
4-17/32
[115.09]
Ø3/16
[4.76]
MOUNTING
HOLES
TYP 4 PLCS
HOW TO ORDER
3-45/64
[94.06]
2-41/64
2-15/64
[56.75]
3-1/8
[79.38]
55/64
OSA (outside air)
6-25/32
[172.16]
1-13/64
[30.56]
3-1/8
[79.38]
2-1/4
[57.15]
4-17/32
[115.09]
55/64
[130.18]
1/64
[55.17]
1/64
[80.57]
1/2 NPT
2-41/64
[67.03]
2-9/64
[54.37]
35/64
[13.89]
8-61/64
[227.30]
Duct mount
2-9/16
[64.96]
2-11/64
[55.12]
A-RHP-FC
EQUALLY SPACED
ON A 4.11
Use the bold characters from the chart below to construct a product code.
RHP -2 D 1
SERIES
RHP: RH/passive temperature sensor transmitter
ACCURACY
-2: 2% accuracy
-3: 3% accuracy
-5: 5% accuracy
HOUSING TYPE
D: Duct mount with plastic hydrophobic lter
O: OSA (outside air)
S: OSA with sintered lter*
R: Radiation shield
*Use OSA with sintered lter models when purchasing Series RHRS
separately.
ACCESSORIES
Model Description
A-RHP-FC
A-RHP-RT
Replacement plastic hydrophobic lter
Retrot tool for tting O-ring on RHP-D/M models for new lter A-RHP-FC
-LCDA
OPTIONS
-LCD: LCD display
-NIST: NIST traceable calibration certicate
TEMPERATURE SENSOR
0: None
1: 4-20 mA
2: 0-10 VDC
3: 0-5 VDC
A: 10K @ 25°C thermistor type III
B: 10K @ 25°C thermistor type II
C: 3K @ 25°C thermistor
D: 100 Ω RTD DIN 385
E: 1K Ω RTD DIN 385
F: 20K Ω @ 25°C thermistor
RH OUTPUT
1: 4-20 mA
2: 0-10 V
3: 0-5 VDC
Makrolon® is a registered trademark of Covestro AG.
DWYER INSTRUMENTS, LLC
©Copyright 2022 Dwyer Instruments, LLC
Printed in U.S.A. 3/22 DS-RHP Rev. 7
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.
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