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.
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 dusty atmosphere or in presence of agressive gases. TECHNICAL DATA
|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 % **
|Reaction time: t90||< 10 s||< 8 s|
|Histeresis||< 1 % RH||-|
|Long-term offset||0.5 % RH / year||-|
|The relays’ parameters:||2A/250VAC/30VDC|
|Radioelectric interference||N level|
|Power supply||12 V / 100 mA power adapter|
|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.|