For DHT22/AM2302 Digital Temperature and Humidity Sensor Replace SHT11 B0B1

Description

Description
Description&Preview
shipping&policy
Description:
Used for DHT22 digital temperature and humidity sensor AM2302 temperature and humidity instead of SHT11 SHT15
Product Features:
AM2302 Humidity Capacitance Digital Temperature and Humidity Sensor is a temperature and humidity composite sensor with calibrated digital signal output. It uses dedicated digital module acquisition technology and temperature and humidity sensing technology to ensure that the product has high reliability and excellent long-term stability. Therefore, the product has the advantages of excellent quality, fast response, strong anti-interference ability, and high cost performance. Each sensor is calibrated in the humidity calibration room. The calibration coefficients are stored in the OTP memory in the form of programs, and these calibration coefficients must be called during the processing of the detection signal inside the sensor. The sensor includes a capacitive humidity sensing element and an NTC temperature measuring element, and is connected with a high-performance 8-bit single-chip microcomputer. It communicates with the microprocessor through a single bus, only one wire is needed, and 40 bits of data are transmitted at a time, with the high bit first. With small size, low power consumption and long communication distance, it can be used in demanding applications.
Product parameters:
Humidity measurement range: 0%～99.9% (range of 0℃-50℃)
Humidity measurement error: ±2%
Temperature measurement range: -40℃～80℃
Temperature measurement error: ±0.5℃, large ±1℃
Resolution: 16 bits
Sampling period: 2s
Working voltage: 3V--5.5V
Special instructions for single bus communication:
1. In the typical application circuit, it is recommended to use a 5.1K pull-up resistor when the length of the connection line is shorter than 30 meters. When it is longer than 30 meters, reduce the resistance of the pull-up resistor according to the actual situation.
2. When using 3.3V voltage power supply, the length of the connection wire should not be greater than 100cm, otherwise the line voltage drop will cause insufficient power supply of the sensor and cause measurement deviation.
3. The small interval time for reading the sensor is 2s, and the reading interval is less than 2s, which may result in inaccurate temperature and humidity or unsuccessful communication.
4. The temperature and humidity value read each time is the result of the last measurement. If you want to obtain real-time data, you need to read it twice in a row. It is recommended to read the sensor multiple times, and the interval between each reading of the sensor is greater than 2 seconds. accurate data.
Package Content:
1 x for DHT22/AM2302 Digital Temperature and Humidity Sensor Replace SHT10 SHT11 SHT15
Preview:
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