HUMIDITY CONTROLLER PWT-421
PWT-421 measures relative humidity, ambient temperature and determines the dew point. The measurement is made with a high-class humidity sensor built in the bottom part of the device or connected with it by a cable.
Characteristic features:
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The controller is available in three versions:
1. Equipped with two relays to control external devices or signalisation system.
2. Equipped with 0 ÷ 20 mA or 4 ÷ 20 mA current loop.
3. Equipped with RS-232 output with a software to collect the data on a PC. Optionally, the connection may be made by USB output with use of RS-232 / USB converter (additional equipment).
The sensor can't be used for measurements in a dusty atmosphere, chambers with chemical, fat, or oil fumes or in presence of aggressive gases. TECHNICAL DATA
Function | Humidity | Temperature |
---|---|---|
Range | 0 ÷ 100 % RH* | -40.0 ÷ 70.0 °C |
Resolution | 0.1 % RH | 0.1 °C |
Accuracy (±1 digit) |
10 ÷ 90 % RH ±2 % ** beyond this range: ±4 % ** |
±0.8 °C** |
Reaction time: t90 | < 10 s | < 8 s |
Histeresis | < 1 % RH | - |
Long-term offset | 0.5 % RH / year | - |
The relays’ parameters: | 2A/250VAC/30VDC | |
Isolation class | PN-83/T-06500 | |
Radioelectric interference | N level | |
Power supply | 12 V / 100 mA power adapter | |
Weight | 180 g | |
Dimensions (mm) | L = 149, W = 82, H = 22 |
* | Condensation of water on the sensor requires drying, wet sensor has wrong indications. |
** | The accuracy with the temperature sensor. |