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    Temperature and Humidity Sensor, Capacitive, One-wire

    Temperature and humidity sensor includes a capacitive humidity sensor and a digital temperature sensor, built-in one high-performance 8-bit SCM, one-wire communication mode, with small size, excellent quality, fast response, strong anti-interference ability, all automated calibration, completely interchangeability, high cost performance, low power consumption, long signal transmission distance above 20m.
    SKU: ATO-TAHS-AM2301/2
    This product has a minimum quantity of 3
    30-day Returns
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    Delivery date: 6-12 days

    Temperature and humidity sensor has a capacitive humidity sensor and a digital temperature sensor, one-wire communication mode.

    Application: Temperature and humidity sensor is widely used in HVAC, dehumidifiers, automobile, data loggers, humidity regulators, and humidity detection and control system.

    Item AM2301 AM2302
    Weight 13.78g 1g
    Dimension (L*W*H) 26.7*13.8*58.8mm 15.4*7.8*25.3mm
    Communication mode One-wire
    Supply voltage DC 3.3-5.2V DC 3.3-5.5V
    Measuring range of relative humidity 0~99.9%RH
    Measuring range of temperature -40~+80℃
    Accuracy of humidity ±3%RH ±2%RH
    Accuracy of temperature ±0.5℃
    Resolution 0.1℃/0.1%RH
    Long-term stability <0.5%RH/year, <0.3℃/year
    Power consumption <300μA
    Sampling period 2s
    Response time <6s <6s
    Housing material ABS PC
    Working environment Temperature: -40~80℃, humidity: 0~99.9% no condensation
    Storage environment Temperature: 0~60℃, humidity: <95%RH
    Wiring 1 red: VDD, 2 yellow: SDA (serial data), 3 black: GND

    Dimensional drawing (unit: mm):
    Temperature and humidity sensor AM2301 dimensional drawing
    Pin assignment:
    Temperature and humidity sensor AM2301 pin assignment
    Tips: Attentions in using a temperature and humidity sensor

    1. Working and storage conditions
      Working beyond the recommended working range of the temperature and humidity sensor may cause a temporary drift signal up to 3%RH. After returning to normal working conditions, temperature and humidity sensor will slowly resume to the standard condition. Refer to the recovery processing to speed up recovery process. Working under abnormal working conditions will accelerate the aging of products.
    2. Effects of exposure to chemicals
      The sensing layer of the capacitive humidity sensor will be disturbed by chemical vapor. Diffusion of chemicals in the sensing layer may lead to drift of measured values and reduction of sensitivity. Pollutants will be released slowly in a pure environment. Recovery processing will accelerate this process. High concentration of chemical pollution, such as ethanol, can cause thorough damage to the sensing layer of sensor.
    3. Temperature effects
      Relative humidity of gas depends to a large extent on temperature. Therefore, when measuring humidity, we should ensure that the humidity sensor works at the same temperature as far as possible. If it uses the same printed circuit board with the electronic components that release energy, the sensor should be kept away from electronic components as far as possible in installation, and shall be installed under the heat source while keeping a good ventilation of the shell. To reduce the heat conduction, the copper coating between the sensor and other parts of the PCB should be as small as possible. A gap shall also be left between them.
    4. Light influence and precautions for wiring and welding
      The temperature and humidity sensor performance will reduce for being exposed in sunlight or strong ultraviolet radiation for a long time. Quality of signal wire will affect the quality of voltage output, and high quality shielded line is recommended. For manual welding, the contact time should be less than 3 seconds at the highest temperature of 300 ℃.
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