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 capacitive 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 to monitor humidity and
temperature in building energy management systems, commercial HVAC
systems, clean rooms, museums and data enters. The optional display allows the
user to read both the temperature and humidity simultaneously.
The Series RHPX can be optionally congured to supply absolute or relative
humidity or dew point in addition to enthalpy.
For best results, our model RHRS radiation shield is
recommended for sintered lter versions of the outside air
transmitter.
NOTICE
Sensor is sensitive to electrostatic discharge (ESD). Follow
industry standard practice for control and protection against
ESD. Failure to exercise good ESD practices may cause damage to the sensor.
NOTICE
Duct Mount
The transmitter should be mounted away from fans, corners, heating and cooling
coils, and other equipment that will affect the measurement of the relative
humidity. It should also be mounted in a location that receives adequate air ow
for proper operation. The transmitter should be mounted such that the conduit
connection points down to prevent moisture from entering.
1. Drill a 1˝ diameter hole into the duct at the desired location.
2. Insert the transmitter probe through the hole such that the base of the
enclosure is ush to the duct.
3. Use four #8 x 1/2˝ pan head sheet metal screws to attach the enclosure to the
duct. Do not over tighten.
4. Open the enclosure by pressing on the snap and lifting the lid.
5. Proceed with wiring according to the desired output conguration.
Disconnect power supply before installation to prevent
electrical shock and equipment damage. Make sure all
connections are in accordance with the job wiring diagram and in accordance
with national and local electrical codes. Use copper conductors only.
WARNING
INSTALLATION
Use electrostatic discharge precautions (e.g., use of wrist
straps) during installation and wiring to prevent equipment
damage.
CAUTION
Surface and Outdoor Mount
Note: For outdoor mounting the transmitter should be mounted under an eave,
shield, or in an area that is out of the elements or direct sunlight. The transmitter
should be mounted with the sensor pointing down to prevent water collection in
the sensor cavity.
For surface mounting the transmitter should be mounted away from fans, corners,
heating and cooling coils, and other equipment that will affect the measurement
of the relative humidity. It should also be mounted in a location that receives
adequate air ow for proper operation with the sensor pointing down to prevent
water collection in the sensor cavity. A vertical mounting surface is preferred but
not required.
1. Position the transmitter where it is to be mounted and mark the mounting
holes in each corner of the housing.
2. Drill or punch out marked locations.
3. Place the transmitter box over mounting holes on wall and align. Install unit
with screws (not provided) in mounting holes.
4. Open lid by pressing in on tab at bottom of front of lid.
5. Proceed to wiring information section. .
6. Close lid by pressing down on lid surface until the snap engages into the lower
housing (To ensure IP67 compliance, use 10-32 X 5/16˝ machined screws or
#10 X 5/16˝ plastite screws).
5 47/64
[145.66]
[267.20]
2 19/32
[66.04]
[60.96]
2 5/8
[66.68]
1 11/64
[29.92]
5 55/64
[148.97]
3 7/32
[81.92]
[5.08]
2 19/32
1 19/64
[33.02]
2 13/32
[60.96]
1 13/64
[30.48]
2 5/8
[66.68]
1 11/64
[29.92]
5 1/64
4x13/64
[5.08]
5 1/64
8 61/64
[227.31]
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).
Resolution: Relative humidity: 0.1%; temperature: 0.1°F/°C; absolute humidity:
0.1 g/m3.
Network Communication: BACnet MS/TP protocol or Modbus® RTU.
Supported BAUD Rates: 9600, 19200, 38400, 57600, 76800, 115200.
Termination Load: 120 Ω.
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: 14 to 35 Vdc or 10 to 32 Vac.
Wiring Connection: Removable 5P 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
Wall Mount
HDPE Filter
Wall Mount with HDPE
lter with shield
Wall Mount with
Bronze Filter
Duct
Mount
Large Enclosure with Heat
Radiation Shield
Avoid locations where severe shock, vibration, excessive
moisture, corrosive or volatile organic compounds are present.
NEMA Type 4X (IP66) housings are intended for outdoor use primarily to provide
a degree of protection against wind-blown dust, rain, and hose-directed water.
NOTICE
Do not exceed ratings of this device, permanent damage not
covered by warranty may result.
NOTICE
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