This document discusses Dwyer Instruments' humidity and temperature transmitters, including their various mounting configurations, sensor specifications, applications, and contact information for ordering or getting more information. The transmitters can be mounted in ducts, on walls, outdoors, or remotely and measure humidity, temperature, or both for various HVAC and building automation applications.

1. Humidity / Temperature
Transmitters
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©Copyright 2011 Dwyer Instruments, Inc.

2. Humidity Product Family
► Multiple
Mounting
Configurations
 Duct Mount
 Wall Mount
 Outside Air
 Remote Sensor
 Compact Housing
 Hazardous Locations

3. Humidity Sensor Specifications
► Capacitive Polymer Sensor
 Relative Humidity Range: 0-100%
RH
 Response Time: 15 Seconds
 Sensor Recovers 100% From
Saturation
 Factory Calibrated Field Replaceable
Sensors (except Series WHT)

4. Humidity Sensor Specifications
► Accuracy
 2% Models: ± 2% @ 10-90% RH
 3% Models: ± 3% @ 20-80% RH
► Temperature Limits
 Temperature Range: -40 to 140° F (-40 to
60˚C)
 Compensated Temperature Range: -4 to 140° F
(-20 to 60˚C)

5. Wall Mount Humidity
► Wall Mount
 Optional Remote or Integral LCD
Display
 Universal Current / Voltage Output
for Humidity and Temperature
 Resistive Temperature Outputs
Available
 Replaceable Sensors
 Well Ventilated for More Accurate
Measurements

6. Duct Mount Humidity
► Duct Mount
 Weather resistant PBT Construction
 Dual Temperature & RH Output
► Optional Display Reads Both Temperature & Relative
Humidity
 Field Replaceable Sensor Cap or Filter
 Twist-Off Cover, No Screws
 Available With Sintered Filter

7. Outside Air Humidity
► Outdoor Air
 NEMA 4X / IP65 Housing
 Field Replaceable Sensor
 Multiple Knock Outs for Conduit
 Screws Anchored Inside Lid Top
 Available with Stainless Steel
Sintered Filter

8. Remote Mount and Compact
Housing
► Remote Sensor (Series RH-R)
 Low Profile Sensor
 Protect Electronics From High
Temperatures
 Field Replaceable Cable & Sensor
► Compact Housing (Series WHT)
 Sintered Filter Protects Sensor
 Watertight Housing
 Integral Mounting Ears

9. Hazardous Area Transmitters
► Explosion-Proof (Series HHT-E)
 FM Approved for Class I Div 1 Groups B,C,D,
Class II Div 1 Groups E,F,G, Class III Div 1
 Humidity Transmitter Only
 Optional LCD Display
► Intrinsically-Safe (Series HHT-I)
 Must be Used with KFD0-SCS-EX1.55 Galvanic
Isolator
 FM Approved for Class I Div 1 Groups B,C,D,
Class II Div 1 Groups E,F,G, Class III Div 1 T4
 Humidity or Humidity / Temperature Model

10. Applications
► Wall Mount
Humidity /
Temperature
Transmitter
mounted in a room
sends signal to
controller on VAV
system to adjust
amount of air flow
supplied to the
space.

11. Applications
► Duct Mount
Humidity /
Temperature
Transmitter
monitors the
humidity of the
supply air after a
humidifier and the
humidity in return
duct for economizer
applications

12. Applications
► Outside Air
Humidity /
Temperature
transmitter
used to
determine if
additional hot or
cold water needs
to feed AHU

13. Questions
To order a free catalog or for more information contact;
Dwyer Instruments, Inc., P.O. Box 373,
Michigan City, IN., 46361
Telephone: (800) 872-9141 or (219) 879-8000
Fax: (219) 872-9057
Internet address: www.dwyer-inst.com
E-mail: info@dwyer-inst.com