Sensors・Electronic Components／Relative Humidity Sensors

　Technical Note　CAT.No.SE-128e

Relative Humidity Sensors

Type KH-5500

This is a low cost type sensor that maintains the performance of type KH-5100 which is used for various measurement equipment. Relative humidity is detected by capacity, and this sensor is possible to use for a wide area from low temperature-low humidity to high temperature-high humidity.

Characteristics

1. Wide range detection of humidity. : It is possible to measure 0-100%RH at from less than 0℃ to 80℃.
2. Low cost. : Cost is almost the same as the one of resistance type sensor.
3. High sensitivity and high linearity. : The rate of the capacitance changed by relative humidity is high.
4. Small temperature dependence. : The influence of the capacitance by the temperature change is small.
5. Quick response. : Within 20 seconds at room temperature(90% response).
6. Excellent durability. : Sensor chip is covered by protection film.
7. High reliability. : Out put signal is stable even if dew is contacted to the sensor device.
8. Compact size and lightness. : The weight of a sensor device is about 1g.
9. A filter can be selected. : The celection of filter for dustproof ability for use is possible.
10. Environmental protection product. : It corresponds to the RoHS instruction of Europe.

Specification

Temperature operating range	-30～80℃
Humidity operating range	0～100%RH
Standard capacity value	203pF±10% (40%RH at 25℃, 20kHz)
Change rate	0.46pF/%RH
Linearity	±0.5%RH (20～90%RH at 25℃, 20kHz)
Hysteresis	2%RH (10⇔90%RH at 25℃, 20kHz)
Response time	Dehumidification=20 seconds Humidifying=20 seconds (25℃ : 50%RH⇔90%RH, 90% response)
Temperature dependence	-0.2%RH/℃ (60%RH at 10～40℃, 20kHz)
Use frequency	5～200kHz
Maximum impressed voltage	3.5V (P-P)

Appearance	Structure
dimension [mm]
※The spec of the filter of this product can be selected. Type Material Pore size P50 (Standard) Polypropylene 50μm G15 Polyethylene 15μm G10 Polyethylene 10μm

Output characteristic