In wet conditions, water molecules are adsorbed by polar group on the surface of martial. And as the humidity increases, the quantity of water molecules will be changed accordingly. The adsorbed water is gradually condensing and coming into be liquid, which is electrolyte solution with current channel quality.
With the humidity increasing, macromolecule will swell, interior free volume will be bigger, carrier will be increased and the activated energy of macromolecule polyelectrolyte counter-ions will decrease, drift mobility will increase and impedance will decrease. And then when humidity decreases, water molecules are released from ion polymer and the resistor of material will increase. The environment humidity can be monitored through testing the impedance.

Application

Humidity sensor, as an important chemical sensor, which is widely used in fields of warehousing, industry production, and process control, environmental monitoring, home appliances and meteorology etc.

Features

Wide humidity detected rang
Fast response
Small Humidity hysteresis error
Simple manufacture
Easy integration

Specifications

	Temperature	Humidity
Working range	0~60°C	20~90%RH
Storage range	-25~70°C	≤90%RH (non condensation)
Detection range	10~90%RH(0~60℃)
Rated voltage	1.5V AC(MAX, sine wave)
Rated power	0.2mW(MAX, sine wave )
Working frequency	500Hz~2kHz
Nominal value&range	31 (20～50) KΩ(60%RH, 25°C)
TemperatureCharacter	≤0.5%RH/°C
Hysteresis	±2%RH
Response time	Moisture absorption：≤30s Dehumidification：≤40s
Stability	2%RH/year
Accuracy	3%RH

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

1 PC MS-Z3 Macromolecule Humidity Sensor