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:

The controller is available in two 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.

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 a dusty atmosphere, chambers with chemical, fat, or oil fumes or in presence of aggressive gases.

The meter may collect up to 8000 data sets including measured result, measured temperature, time and date. The data may be collected with chosen time interval. The available values of the interval are 1, 2, 5, 10, 15, 30 and 60 minutes. If the memory capacity is used up the oldest result is deleted and replaced with a new one. The collected or actual results may be transferred to a PC with use of the USB connector. The delivered in set software enables the transmission.

TECHNICAL DATA

Function	Humidity	Temperature
Range	0 ÷ 100 % RH*	-40.0 ÷ 70.0 °C
RH 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	-
Power supply	12 V / 100 mA power adapter
Memory	8000 data sets collected with chosen time interval
Isolation class	according to PN-83/T-06500
Radioelectric interference	N level
Weight	180 g
Dimensions (mm)	L = 149, W = 82, H = 22
The relays’ parameters	2A/250VAC/30VDC

*	Condensation of water on the sensor requires drying, wet sensor has wrong indications.
**	The accuracy with the temperature sensor.