Humidity Sensor

AM2302 is an output calibrated digital signal humidity sensor. It applies exclusive digital-signal-collecting-technique and humidity sensing technology, assuring its reliability and stability. Its sensing elements is connected with 8-bit single-chip computer.
Every sensor of this model is temperature compensated and calibrated in accurate calibration chamber and the calibration-coefficient is saved in type of program in OTP memory, when the sensor is detecting, it will cite coefficient from memory.
Small size & low consumption & long transmission distance(100m) enable AM2302 to be suited in all kinds of harsh application occasions. Single-row packaged with four pins, making the connection very convenient.
Features and applications:

  • High precision
  • Capacitive type
  • Full range temperature compensated
  • Relative humidity and temperature measurement
  • Calibrated digital signal
  • Outstanding long-term stability
  • Extra components not needed
  • Long transmission distance, up to 100 meters
  • Low power consumption
  • 4 pins packaged and fully interchangeable
Humidity detection range 20 to 95%
Humidity detection accuracy ± 3% (25 °C, 40 to 80%)
Power supply voltage 3.3-5.5V DC
Operating voltage range 85% to 110% of power supply voltage
Current consumption 10 mA max.
Humidity output 1 to 5 V (for humidity of 0% to 100%)
Permissible load impedance: 100 kΩ min.
(Use a 1:1 connection when connecting to an E5CC/E5EC/E5AC.)
Output signal digital signal via 1-wire bus
Sensing element Polymer humidity capacitor
Operating range humidity 0-100%RH
Accuracy humidity +-2%RH(Max +-5%RH)
Humidity hysteresis +-0.3%RH
Long-term Stability +-0.5%RH/year