Sensors・Electronic Components／Relative Humidity Sensors

　Technical Note　CAT.No.KN-1050

Humidity-to-Frequency Converter

Type　ＫＮ-１０５０

Characteristics

1. Low price and High performance.
   　Equipped with a relative humidity sensor which is high performance, variable capacitance type.
2. Wide range of measured humidity.
   　Possible to measure 0-95%RH at less than 0℃.
3. Optimal frequency output for the interface with MPU.
   　Frequency output is high resistance to electro-magnetic influence.
4. Fast response time.
   　Within 20 seconds at the room temperature. ( 90% response )
5. High reliability.
   　Equipped with a relative humidity sensor which is strong to condensing.
6. Compact size and Easy installation to PWB.
   　Sensor and circuit are stored in a small case.
7. Single DC-5V power supply.
   　Power supply is possible from the main board.

Specification

Maximum ratings

Ratings	Value	Unit
Temperature operating range	-30〜80	℃
Humidity operating range	0〜100	%RH
Storage temperature	-40〜85	℃

Characteristics (Ta=25℃, Va=5.00V)

Characteristics				Unit	Condition
	Min	Typ	Max
Supply voltage (Va)	4.75	5.00	5.25	Vdc
Humidity measurement range	0		95	%RH
Relative humidity accuracy			±5	%RH	40%RH
Output frequency	4950	5000	5050	Hz	40%RH
Sensitivity		10		Hz/%RH	20〜90%RH
Hysteresis		2		%RH	10〜90%RH
Temperature dependence	-0.2		0.2	%RH/℃	10〜60℃
Supply voltage dependence	-0.1		0.1	%RH/0.1V
Response time			20	sec	90% response
Output sink current			16	mA	Open collector
Current consumption		1		mA

Characteristic (example)

Appearance

dimension [mm]

Connection

Reliability characteristic