เซนซอร์วัดอุณหภูมิและความชื้น DHT21/AM2301A capacitive digital temperature and humidity sensor

เซนซอร์วัดอุณหภูมิและความชื้น DHT21/AM2301A capacitive digital temperature and humidity sensor 

Note: DHT21 has been renamed AM2301

AM2301/DHT21 Product Overview

AM2301/DHT21 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 extremely high reliability and long-term stability. The sensor includes a capacitive humidity sensing element and an NTC temperature measuring element, and is connected with a high - performance 8-bit microcontroller . Therefore, the product has the advantages of high quality, ultra-fast response, strong anti-interference ability, and high cost performance. Each AM2301/ DHT21 sensor is calibrated in a very high humidity calibration chamber. The calibration coefficients are stored in the OTP memory in the form of a program, and the sensor needs to call these calibration coefficients during the processing of the detection signal. The single Ultra-small size, extremely low power consumption, and the signal transmission distance can reach more than 20 meters, making it the best choice for various applications and even harsh applications. The product is a 4  -pin single-row lead package. The connection is convenient, and the special package form can be provided according to user needs. 

Application field

• Smart farm
• HVAC  testing and inspection equipment
• car data logger
• Automatic Control of Consumer Goods
• Weather Station Appliances
• Humidity Regulator Medical
• Dehumidifier

1. Description of sensor performance