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:


  • Meter is equipped with a backlit LCD display.
  • Waterproof housing IP-66.
  • The meter is factory calibrated.
  • User's calibration possible in 2 points: 33 % RH and 75 % RH.
  • Powered with 12 V adapter.
  • PWT-421 is equipped with a hanger for mounting on a wall.
  • 24 months of warranty.

  • The sensor can't be used for measurements in dusty atmosphere or in presence of agressive 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.