to List of Sensors & Electronic Components


SensorsEElectronic Components^Relative Humidity Sensors

@Technical Note@CAT.No.KN-1050

Humidity-to-Frequency Converter

Type@‚j‚m-‚P‚O‚T‚O


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Ž.
  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 Ž
Humidity operating range 0`100 %RH
Storage temperature -40`85 Ž

Characteristics (Ta=25Ž, 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/Ž 10`60Ž
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

Subject Test condition Characteristic
High temperature storage 90Ž 200h Fluctuation from the initial value
Within }3%RH
Low temperature storage -40Ž 200h
High temperature operating 80Ž 200h
Low temperature operating -30Ž 200h
Temperature cycle -40Ž Μ 90Ž
Each 1hour 6cycle
Condensation test -5Ž¨35Ž 85%RH
Vibration test 5`200 Hz 29.4 m/s2 10 mm
4 hours up and down
2 hours right and left
2 hours back and forth
Impact test Fall from 1meter in height
3times ~ 3direction



to List of Sensors & Electronic Components