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Changsha Purple Horn E-Commerce Co., Ltd.

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China Capacitive humidity sensor Adafruit Industries 393 digital temperature sensor
China Capacitive humidity sensor Adafruit Industries 393 digital temperature sensor

  1. China Capacitive humidity sensor Adafruit Industries 393 digital temperature sensor

Capacitive humidity sensor Adafruit Industries 393 digital temperature sensor

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Description Humidity, Moisture Sensors RoHS
Mfr. Part # 393
Model Number 393

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  1. Product Details
  2. Company Details

Product Specification

Description Humidity, Moisture Sensors RoHS Mfr. Part # 393
Model Number 393

Product Overview

The AM2302 (also known as DHT22) is a digital relative humidity and temperature sensor featuring a capacitive humidity sensing element and an internal thermistor. It offers a calibrated digital signal output via a 1-wire bus, making it easy to integrate with microcontrollers. This sensor is designed for full-range temperature compensation, outstanding long-term stability, and requires no extra components. Its small size, low power consumption, and long transmission distance (up to 100 meters) make it suitable for a wide range of harsh application environments. The AM2302 is fully interchangeable and available in a standard or big case with wires.

Product Attributes

  • Sensor Type: Digital relative humidity and temperature sensor
  • Sensing Element: Capacitive type, Polymer humidity capacitor
  • Signal Output: Calibrated digital signal via 1-wire bus
  • Packaging: 4 pins, fully interchangeable
  • Available Variants: Standard case, Big case with wires
  • Wire Colors: Red (Power Supply), Black (GND), Yellow (Data Output)

Technical Specifications

Specification Details
Model AM2302 / DHT22
Power Supply 3.3-5.5V DC
Output Signal Digital signal via 1-wire bus
Operating Range (Humidity) 0-100%RH
Operating Range (Temperature) -40~80C
Accuracy (Humidity) ±2%RH (Max ±5%RH)
Accuracy (Temperature) ±0.5C
Resolution/Sensitivity (Humidity) 0.1%RH
Resolution/Sensitivity (Temperature) 0.1C
Repeatability (Humidity) ±1%RH
Repeatability (Temperature) ±0.2C
Humidity Hysteresis ±0.3%RH
Long-term Stability ±0.5%RH/year
Transmission Distance Up to 100 meters
Current Supply (Measuring) 1 - 1.5 mA
Current Supply (Stand-by) 40 - 50 μA
Dimensions Refer to diagram in source document

Application Scenarios

The AM2302 is well-suited for various applications requiring accurate humidity and temperature monitoring, including:

  • Harsh application occasions
  • Environments where long transmission distances are required
  • Applications demanding high precision and long-term stability
  • Integration into systems where extra components are not desired

Important Attentions

  • Avoid operating or storing the sensor outside the specified RH range to prevent accelerated aging.
  • Chemical vapors can interfere with sensor performance; follow specific recovery steps if contamination occurs.
  • Temperature significantly affects relative humidity; maintain a stable temperature environment and position the sensor away from heat sources.
  • Prolonged exposure to strong light and UV may degrade performance.
  • Use high-quality shielded wires for optimal communication quality and distance.
  • Welding temperature should be below 260C.
  • Avoid using the sensor under dew conditions.
  • Do not use this product in safety-critical devices or applications where failure could cause personal injury.
  • The sensor requires a 1-second delay after power-up before receiving instructions.
  • A 100nF capacitor can be added between VDD and GND for wave filtering.
  • The AM2302's 1-wire bus is proprietary and not compatible with Maxim/Dallas 1-wire bus.

2410311440_Adafruit-Industries-393_C5494888.pdf

Company Details

Bronze Gleitlager

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 from Quality China Factory
  • Business Type:

    Manufacturer,Distributor/Wholesaler,Agent,Importer

  • Year Established:

    2009

  • Employee Number:

    300~500

  • Ecer Certification:

    Verified Supplier

Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa... Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa...

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  • Changsha Purple Horn E-Commerce Co., Ltd.
  • 2332 Kaibin Commercial Plaza, No. 419 Shaoshan Middle Road, Shazitang Street, Yuhua District, Changsha City, Hunan Province
  • https://www.sensorsics.com/

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