AM2302 Temperature And Humidity Sensor


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


  • High precision
  • Capacitive type
  • Full-range temperature compensated
  • Relative humidity and temperature measurement
  • Calibrated digital signal
  • Outstanding long-term stability
  • Long transmission distance, up to 100 meters
  • Low power consumption
  • 4 pins packaged and fully interchangeable


1VccPower supply 3.5V to 5.5V
2DataOutputs both Temperature and Humidity through serial Data
3NCNo Connection and hence not used
4GroundConnected to the ground of the circuit


Power supply3.3-5.5V DC
Output signaldigital signal via a 1-wire bus
Sensing elementPolymer humidity capacitor
Operating rangehumidity 0-100%RH; temperature -40~80Celsius
Accuracyhumidity +-2%RH(Max +-5%RH); temperature +-0.5Celsius
Resolution or sensitivityhumidity 0.1%RH; temperature 0.1Celsius
Repeatabilityhumidity +-1%RH; temperature +-0.2Celsius
Humidity hysteresis+-0.3%RH
Long-term Stability+-0.5%RH/year
Interchangeabilityfully interchangeable


  • Environmental monitoring systems: The AM2302 sensor can be used in environmental monitoring applications to measure temperature and humidity levels in real time. It is commonly employed in weather stations, greenhouses, and indoor climate control systems.
  • HVAC systems: Heating, ventilation, and air conditioning (HVAC) systems rely on accurate temperature and humidity measurements to maintain optimal indoor conditions. The AM2302 sensor can be integrated into these systems to provide precise data for temperature and humidity control.
  • Agriculture and horticulture: The sensor can be utilized in agricultural and horticultural settings to monitor temperature and humidity levels in crop cultivation areas. This information helps farmers and growers create suitable conditions for plant growth and optimize irrigation strategies.


Download the Datasheet for AM2302 Temperature & Humidity Sensor from the link given below.