Johnson Controls Hx-68P3 Series Catalog Page
Hx-68P3 Series Outside Humidity and
Temperature Transmitter
Code No. LIT-1900867
Issued March 10, 2014
Hx-68P3 Series Outside Humidity and Temperature Transmitters
Description
The Hx-68P3 Series Outside Humidity and
Temperature Transmitter measures and
transmits outside relative humidity (RH) from 0
to 100% and temperatures from -40 to 140F
(-40 to 60C). In addition to RH, the transmitter
offers selectable parameters including dew
point, wet bulb temperature, and enthalpy.
The humidity sensor is impervious to dust and
most chemicals and is not damaged by
condensation. The weather shield protects the
sensors from solar radiation and precipitation
without affecting performance. The multiple
discs have a unique profile that permits easy
passage of air. The disc material is especially
formulated for high reflectivity, low thermal
conductivity and maximum weather resistance.
This rugged enclosure will assure a long life,
even under extreme weather conditions.
The sensor and shield function as one unit for
optimal performance. Mount the transmitter
outside on a pole or on a side of a building. It
requires no routine maintenance or
recalibration.
Refer to the Hx-68P3 Series Outside Humidity
and Temperature Transmitters Product
Bulletin (LIT-12011896) for important product
application information.
Features
• 0 to 100% RH offers a full range of accurate
RH measurement
• rugged shield construction protects sensors
from solar radiation and precipitation
without affecting performance
• multiplate shield design maximizes airflow
for precise RH and temperature readings
• excellent long-term stability provides
accurate RH measurement over long
periods of time without degeneration
• no routine maintenance or calibration
ensures low maintenance cost
• two wire loop powered connection 4 to 20
mA or four wire 0 to 10 VDC looped
power-output enables easy installation
• polymer thin film sensor omits inaccuracies
due to dust, water vapor, harsh
environments or most chemicals
• negligible temperature coefficient ensures
that temperature changes are immaterial to
accurate RH measurement
Applications
Humidity is an important aspect of any climate
control system. The significance of indoor air
quality to our health has become evident.
Humans are best suited to and feel most
comfortable at certain humidities and
temperatures, whereas excessively high or
low humidities or temperatures cause
discomfort. Accurate outdoor humidity
measurement means that steps can be taken
indoors to ensure a quality building
environment.
The right humidity makes it possible to
optimize energy consumption. Energy
management projects with hundreds of
setpoints may have only one outdoor humidity
sensor. If that sensor is not accurate, energy
costs may rise and building comfort may
suffer. The maintenance-free, accurate, yearafter-year service of our transmitters keeps
energy costs low and building comfort high.
The sensors are compatible with most energy
management systems.
Selection Chart
Hx-68P3 Series Humidity Transmitters
Code Number Description
HE-68P3-0N000 Outdoor RH Transmitter with
HT-68P3-0N000 Outdoor RH Transmitter with
Temperature Sensor,
10 VDC Output
Temperature Sensor,
4to20mA Output
Repair Information
If the Hx-68P3 Series Humidity Transmitter
fails to operate within its specifications,
replace the unit. For a replacement
transmitter, contact the nearest
Johnson Controls® representative.
The performance specifications are nomina l and conf orm to accep table industr y standar ds. For ap plications a t condition s beyond th ese specification s, consult the local Johnson Controls o ffice.
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2014 Johnson Controls, Inc.
www.johnsoncontrols.com
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Hx-68P3 Series Outside Humidity and Temperature Transmitters (Continued)
Technical Specifications
Hx-68P3 Series Outside Humidity and Temperature Transmitter
Operating Conditions Temperature -40 to 140F (-40 to 60C)
Humidity 0 to 100% RH
Relative Humidity Measurement range 0 to 100% RH
Accuracy: Temperature Range
50 to 86F (10 to 30C):
0 to 90% RH
90 to 100% RH
Accuracy: Temperature Range
-4 to 50F (-20 to 10C)
86 to 140F (30 to 60C):
0 to 90% RH
90 to 100% RH
Accuracy: Temperature Range
-40 to -4F (-40 to -20C):
0 to 100% RH ±7% RH
Stability in typical HVAC app. ±2% RH over 2 years
Temperature Measurement range -40 to 140F (-40 to 60C)
Accuracy at 68F (20C) ±0.54F (±0.3C)
Temperature dependance ±0.01C/C
Temperature sensor Pt1000 RTD Class F0.1 IEC60751
Dewpoint Accuracy at 68F (20C) and 80% RH ±1.6F (±0.9C)
Wet Bulb ±1.3F (±0.7C)
Enthalpy ±0.9 BTU/lb (±2kj/kg)
Ingress Protection IP65
Maximum Wind/Flow Speed 98.42 ft/s (30 m/s)
Storage Temperature -40 to 140F (Current Output
(HT-68P3-0N000) (Two-Wire)
Voltage Output (HE-68P3-0N000) (ThreeWire)
Wire Size
Electromagnetic Compliance EN61326-1 Industrial Environment
Standard Housing Color White (RAL9003)
Compliance United States FCC compliant to CFR 47, Part 15, Subpart B, Class A
Outputs 4 to 20 mA, loop powered
Loop resistance 0 to 600 ohm
Supply voltage 20 to 28 VDC at 600 ohm load;
Outputs 0 to 10 V
Load resistance 10k ohm minimum
Supply voltage 18 to 35 VDC; 24 VAC ±20%, 50/60 Hz
Canada Under CAN/CSA-CEI/IEC CISPR 22:02, Class A
Europe CE Mark - Johnson Controls, Inc. declares that this product is in
Australia and New Zealand C-Tick mark
±3% RH
±5% RH
±5% RH
±7% RH
40 to 60C)
10 to 28 VDC at 0 ohm load
16 AWG (1.5 mm
compliance with the essential requirements and other relevant
provisions of the EMC Directive - 2004/108/EC.
2
) maximum
The performance specifications are no minal and co nform t o acceptab le ind ustry standar ds. For appl ications at condition s beyond these specifica tions, consult the local Johnson Co ntrols office.
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2014 Johnson Controls, Inc.
www.johnsoncontrols.com
2
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