Product Overview

Application and Description
The THE-1105 can be wall-mounted in vertical or
horizontal installations for building automation
systems requiring accurate monitoring of humidity
and temperature. It transmits separate relative
humidity (RH) and temperature signals for use in
temperature, humidity, or enthalpy-based control
applications. Environmentally rugged, it is suitable
for hospitals, laboratories, and swimming pool areas.
This transmier uses a silicon CMOS chip sensor
(providing much more durable and reliable
performance than older capacitive polymer sensors).
It responds within seconds to changes in humidity
with a very high degree of accuracy.
For humidity readings, the THE-1105 has two
user-selectable output ranges: 0 to 5 or 0 to 10 VDC
(scaled over 0 to 100% RH range).
The THE-1105 also contains a thermistor for
measuring room temperature. The Type II 10,000
ohm (@ 77° F) thermistor provides precise, stable
temperature sensing.
Features
◆ Transmits separate temperature and humidity
signals
◆ CMOS chip humidity sensor provides excellent
linearity, sensitivity, and reliability with user-
selectable output ranges
◆ Type II 10,000 ohm thermistor for temperature
sensing
◆ Light almond (HPO-1501) cover (included)
◆ Can be mounted on a 2 x 4 electrical box (using
an HMO-50xx mounting plate kit) or to a hollow
wall (using an HMO-5001 or HMO-5023—see the
Accessories section)
Specifications and design subject to change without notice.
Application and Description 1
Features 1
Specifications 1
Details 2
Accessories 2
THE-1105
Humidity Transmitter with Temperature Sensor
Specifications
Supply Voltage 24 VAC (–15%/+20%), Class 2
Only
Supply Power 0.84 VA at 24 VAC
Humidity Element
Output Range 0 to 100% RH
Sensing Accuracy ±2% RH over the 10 to 90%
RH range @ 77° F (25° C)
Output Signal
0 to 5 VDC or 0 to 10 VDC
(over 0 to 100% RH), capable
of driving 1000 ohms or
greater
Temperature Sensor
Type Type II thermistor
Accuracy ±0.36° F (±0.20° C)
Resistance 10,000 ohm @ 77° F (25° C)
NTC 4.37%/° C @ 25° C
Dissipation Constant 2 mW/° C
Wire Size 18 to 22 AWG with a max. 250-
foot length
Material
Base Black ABS
Cover Light almond ame-retardant
plastic
Weight
3.0 oz. (85 grams)
Approvals SASO PCP Registration KSA
R-103260
Temperature Limits
Operating 40 to 120° F (4 to 49° C)
Shipping –40 to 140° F (–40 to 60° C)
Humidity 0 to 100% relative humidity,
non-condensing