Omega WHT User guide

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SERIES WHT | WEATHER-RESISTANT HUMIDITY/TEMPERATURE TRANSMITTER

BENEFITS/FEATURES

• Easy installation into tight spaces with compact NEMA 3S housing

• Reduced installation costs with combination RH and temperature outputs as required

DESCRIPTIONAPPLICATIONS

• Air handling economizers

• Air environment monitoring in agriculture or livestock cultivation houses

SPECIFICATIONS

Relative Humidity Range 0 to 100% RH.

Temperature Range -40 to 140°F (-40 to 60°C).

Sensor Accuracy, RH ±2% @ 20 to 80% RH, ±3% @ 10 to 20%, 80 to 90% RH.

Accuracy, Temp Models

with 4-20 mA Temp. Output

Accuracy, Temp Models with

Passive Thermistor Temp Sensor

Hysteresis, RH ±1%.

Repeatability, RH ±0.1% typical.

Temperature Limits -40 to 140°F (-40 to 60°C).

Compensated Temperature Range, RH -4 to 140°F (-20 to 60°C).

Power Requirements 4-20 mA loop powered models: 10-35 VDC; 0-10 V output models: 15-35 VDC or 15-29 VAC; 0-5 V output

Output Signal 4-20 mA loop powered models: 4-20 mA; 0-10 V output models: 0-10 V @ 5 mA max; 0-5 V output models:

Response Time 15 s.

Electrical Connections Removable screw terminal block.

RH Sensor Capacitance polymer.

Temperature Sensor 4-20 mA output, solid state band gap. Passive output: 10K @ 25°C thermistor (Dwyer curve A).

Enclosure ABS.

Enclosure Rating Designed to meet NEMA 3S (IP54).

Weight 0.3 oz (8.5 g).

Compliance CE.

±0.9°F @ 72°F (±0.3°C @ 25°C).

±0.36°F @ 77°F (±0.2°C @ 25°C).

models: 10-35 VDC or 10-29 VAC.

0-5 V @ 5 mA max.

Drift <1% RH/year.

The compact Series WHT Weather-Resistant Humidity/Temperature Transmitter is designed to withstand the elements. A removable sintered

lter protects the polymer capacitance sensor from solid objects that may

come in contact with the transmitter. The transmitter is available with 4-20

mA or 0-10 VDC output signals for both temperature and humidity. This transmitter is ideal for measuring outside air temperature and humidity levels for air handling economizer applications.

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DIMENSIONS

RH RECEIVER

1 2 3 4

RH RECEIVER

+– +–

1 2 3 4 5

+–

2X 5/16 [7.94]

WIRING DIAGRAM

TEMP. RECEIVER

+–

4-9/16

15.89]

POWER SUPPLY

–

2-3/4

[69.85]

[76.2]

3-31/64

[88.5]

[101.6]

1-27/64

[36.12]

1-31/64

[37.70]

WIRING

TEMP. RECEIVER

RH RECEIVER

POWER SUPPLY

–

Models with 4-20 mA RH output,

with or without 4-20 mA temperature output

TEMP. SENSOR

POWER

+–

–

SUPPLY

Models with 4-20 mA RH output

and a passive thermistor temperature sensor

HOW TO ORDER

Use the bold characters from the chart below to construct a product code.

WHT -31 0

SERIES

WHT: Weather-resistant humidity/temperature transmitter

RH OUTPUT

-31: 4-20 mA

-32: 0-10 VDC

-33: 0-5 VDC

Models with 0-5 V or 0-10 V RH output,

with or without 0-5 V or 0-10 V temperature output

TEMP. SENSOR

RH RECEIVER

POWER SUPPLY

–

Models with 0-5 or 0-10 V RH output and

a passive thermistor temperature sensor

TEMPERATURE

0: None 1: 4-20 mA 2: 0-10 VDC 3: 0-5 VDC

A: 10K Ω type III

Printed in U.S.A. 3/22 DS-WHT Rev. 2

Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identied in this publication without notice. Dwyer advises its customers to obtain the latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.

DWYER INSTRUMENTS, LLC