SERIES WHAT |
WEATHER-RESISTANT HUMIDITY/TEMPERATURE TRANSMITTER
BENEFITS/FEATURES
- Easy installation into tight spaces with compact NEMA 3S housing
- Reduced installation costs with a combination of RH and temperature outputs as required
APPLICATIONS
- Air handling economizers
- Air environment monitoring in agriculture or livestock cultivation houses
DESCRIPTION
The compact Series WHT Weather-Resistant Humidity/Temperature
The transmitter is designed to withstand the elements. A removable sintered filter 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.
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 | ±0.9°F © 72°F (±0.3°C © 25°C). |
| Accuracy, Temp Models with Passive Thermistor Temp Sensor | ±0.36°F @ 77°F (±0.2°C @ 25°C). |
| 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 models: 10-35 VDC or 10-29 VAC. |
| 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: 0-5 V @ 5 mA max. |
| Response Time | 15 s. |
| Electrical Connections | Removable screw terminal block. |
| Drift | <1% RH/year. |
| 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. |
DIMENSIONS
WIRING DIAGRAM
Models with 4-20 mA RH output, with or without 4-20 mA temperature output 
Models with 4-20 mA RH output and a passive thermistor temperature sensor
Models with 0-5 V or 0-10 V RH output, with or without 0-5 V or 0-10 V temperature output 
Models with 0-5 or 0-10 V RH output and a passive thermistor temperature sensor
HOW TO ORDER
Use the bold characters from the chart below to construct a product code.
ORDER ONLINE TOD
dwyer-inst.com/Product/SeriesWHT
©Copyright 2022 Dwyer Instruments, LLC Printed in the U.S.A. 3/22
Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identified 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
DS-WHT Rev. 2
