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®
SERIES RHPX
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HUMIDITY AND TEMPERATURE TRANSMITTER
Passive and Active Temperature Outputs, Indoor and Outdoor Enclosures
CALIBRATION SERVICES AVAILABLE
AIR QUALITY
The Series RHPX Humidity and Temperature Transmitter accurately monitors the
humidity and temperature for building control functions to maximize occupant comfort
and minimize operating costs. Featuring capacitance polymer humidity sensors,
models are available in 2% and 3% accuracies. An optional two-line alphanumeric
LCD display is available. The high accuracy, long term stability and reliable operation
in multiple enclosure styles make the Series RHPX an excellent choice for monitoring
humidity and temperature in building energy management systems, commercial
HVAC systems, clean rooms, museums and data centers. The Series RHPX can be
optionally congured to supply absolute or relative humidity or dew point in addition to
enthalpy.
BENEFITS/FEATURES
• Reduced installation costs with multiple on-board sensors
• Minimal maintenance with UV rated outdoor enclosures
• UL 2043 compliant allows installation into the plenum space
• Easy installation with removable terminal block, attached lid, and cable management
APPLICATIONS
• Air economizers
• Outdoor humidity and temperature reference
• Pool room humidity monitoring
• Building energy management systems
MODEL CHART
Example RHPX -2 S D A 0 -00 -LCD RHPX-2SDA0-00-LCD
Series RHPX Relative humidity/temperature
Accuracy 2
Humidity/Temperature Transmitters
Enclosure S
RH Sensor
Conguration
RH and
Temperature
Output Active
Temperature
Sensor Passive
Cable Length 00
Options LCD
Wall Mount with HDPE
lter with shield
Duct
Mount
3
L
B
D
E
F
G
H
R
S
W
Wall Mount
HDPE Filter
Large Enclosure with Heat
Radiation Shield
• Commercial HVAC systems
• Clean rooms
• Museums
• Data centers
transmitter
2 % RH accuracy
3 % RH accuracy
Small enclosure
Large enclosure
Bronze sintered lter
Duct mount with plenum plastic
probe and hydrophobic lter
Duct mount with plenum plastic
probe and rapid response lter
Duct mount with SSTL probe and
hydrophobic lter
Duct mount with SSTL probe and
rapid response lter
HDPE lter and solar radiation
shield (factory installed)
Remote humidity sensor
HDPE lter with cover
A
C
0
A
B
C
D
E
F
04
08
12
16
HDPE lter without cover
Selectable analog output
BACnet MS/TP or Modbus
communications
None
10000 Ω @ 25 °C thermistor type III
10000 Ω @ 25 °C thermistor type II
1000 Ω Balco RTD
100 Ω RTD DIN 385
1000 Ω RTD DIN 385
20000 Ω @ 25 °C thermistor
No cable
1.2 m cable (4 ft) (-R model only)
2.4 m cable (8 ft) (-R model only)
3.6 m cable (12 ft) (-R model only)
4.9 m cable (16 ft) (-R model only)
LCD display
NIST
NIST traceable calibration certicate
Wall Mount with
Bronze Filter
®
RTU
YEAR LIMITED
WARRANTY
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SPECIFICATIONS
Humidity Measurement Range: 0 % to 100 % humidity.
Temperature Measurement Range: -40 °C to 60 °C (-40 °F to 140 °F).
Humidity Sensor Accuracy: Model specic, ±2 % or ±3 %, at 10 % - 90 % RH and
25 °C (77 °F).
Temperature Sensor Accuracy, Solid State Band Gap: ±0.9°F @ 77°F (±0.5°C
@ 25°C).
Temperature Sensor Accuracy, Thermistor: ±0.2°C @ 25°C (±0.36°F @ 77°F)
(analog models only).
Temperature Sensor Accuracy, RTD: DIN Class B; ±0.3°C @ 0°C (±0.54°F @
32°F) (analog models only).
Resolution: Relative humidity: 0.1%; temperature: 0.1°F/°C; absolute humidity: 0.1
g/m3.
Humidity Analog Output: 4-20 mA or 0-5 V dc, 0-10 V dc at 5 mA max, eld
selectable.
Active Temperature Analog Output: 4-20 mA or 0-5 V dc, 0-10 V dc at 5 mA max,
eld selectable.
Passive Temperature Sensors: Types II and III: Solid state band gap; Curves A,
B, and F: Thermistor; Curves D and E: Platinum RTD DIN 385, Balco 1K (analog
models only, availability is sensor conguration dependent).
Network Communication: BACnet MS/TP protocol or Modbus® RTU
(communicating models only).
Supported BAUD Rates: 9600, 19200, 38400, 57600, 76800, 115200
(communicating models only).
Termination Load: 120 Ω (communicating models only).
Operating Temperature Range: -40°C to 60°C (-40°F to 140°F); With LCD: -20°C
to 60°C (-4°F to 140°F).
Power Requirements: Communications model: 14 to 35 Vdc or 10 to 32 Vac;
Analog model: 4-20 mA: 10 to 35 Vdc; Vout: 15 to 35 Vdc or 15 to 29 Vac.
Wiring Connection: Removable terminal block.
Electrical Entry: 1/2˝ NPS thread. Cable gland included.
Humidity Sensor: Capacitive polymer.
Enclosure Material: UL 94 V-0.
Enclosure Rating: IP66.
Optional Display: Two (2) lines of alphanumeric characters with eight (8)
characters per line.
Weight: Duct: 198.4 g (0.44 lb); wall mount: 170 g (0.38 lb); large housing: 340.2 g
(0.75 lb); large housing with radiation shield: 1247.4 g (2.75 lb).
Storage Temperature: -40°C to 70°C (-40°F to 158°F); With LCD: -30°C to 70°C
(-22°F to 158°F).
Additional calculations: Absolute humidity: (0 to 50) g/m3 or (0 to 3000) lb/mmcf;
dew point -75 °C to 60 °C (-102 °F to 140 °F); enthalpy (-40 to 411) kj/kg or (-17 to
177) Btu/lb.
Compliance: BTL, CE, UL 2043*, UL-60335-2-40**.
* UL 2043 compliance limited to models:
RHPX-XS(B,S,W) Wall Mount
RHPX-XS(D,E)-XX-X Plastic Probe Duct Mount without LCD
RHPX-XS(F,G)-XX-X SSTL Duct Mount with LCD
RHPX-XL(B,S,W) Large Wall Mount without LCD
RHPX-XL(H) Large Wall Mount without LCD & Solar Radiation Shield
** Meets UL-60335-2 clause 30.103DV.1 through UL2043 compliance
ACCESSORIES
Model Description
RHRS
A-RHPX-PLATE
A-RHPX-DEPTH
USA: California Proposition 65
WARNING: This product can be expose you to chemicals including methylene chloride, which is
known to the State of California to cause cancer, and bisphenol A (BPA), which is known to the
State of California to cause birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
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Six (6) plate solar radiation shield for sintered lter version
RHPX duct mount adapter plate to RHP duct mount
RHPX duct mount depth adjustment bracket
Modbus® is a registered trademark of Schneider Electric USA, Inc.
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