


Dwyer Instruments WHT-330 | Water-resistant humidity transmitter with sintered filter | 3% accuracy | 0-5 VDC humidity output
A weather-resistant humidity/temperature transmitter, the WHT-330 is a compact model from the Series WHT. The polymer capacitance sensor is shielded from solid objects that could come into contact with the transmitter by a detachable sintered filter. For both temperature and humidity, the transmitter can provide output signals between 0 and 10 VDC or between 4 and 20 mA. For air handling economizer applications, this transmitter is perfect for sensing the outside air temperature and humidity levels.

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Accuracy | 4 to 20 mA Output: +/-0.9°F @ 72°F (+/-0.3°C @ 25°C) Passive Output: +/-0.36°F @ 77°F (+/-0.2°C @ 25°C) |
Accuracy | Sensor, RH: +/-2% 20 to 80% RH, +/-3% @ 10 to 20%, 80 to 90% RH |
Approvals | CE |
Connection | Electrical: Removable screw terminal block |
Drift | <1% RH/year |
Enclosure Rating | Designed to meet NEMA 3S (IP54) |
Enclosure | ABS |
Hysteresis | RH: +/-1% |
Maximum operating temperature | -40 to 140°F (-40 to 60°C) |
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 |
Power | 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 |
Relative Humidity | Range: 0 to 100% RH |
Repeatability | RH: +/-0.1% typical |
Response Time | 15 s |
Sensor Type | Capacitance polymer |
Storage Temperature | -40 to 176°F (-40 to 80°C) |
Temperature Range | -40 to 140°F (-40 to 60°C) |
Temperature Range | Compensated, RH: -4 to 140°F (-20 to 60°C) |
TEMPERATURE SENSOR | 4 to 20 mA output: solid state band gap; Passive output: 10K @ 25°C thermistor (Dwyer curve A) |
Weight | 0.3 oz (8.5 g) |
- Temperature or relative humidity outputs.
- NEMA 3S structure that is small.
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