DHT21 / AM2301 Capacitive Digital Temperature And Humidity Sensor Module

---- DHT21 also known as AM2301

1). Relative humidity and temperature measurement, all calibrated, digital output

2) Excellence in long-term stability

3) No additional parts required

4). Long signal transmission distance

5). Ultra low energy consumption

6) .4 pin installed

7). Fully interchangeable

DHT21 Product Overview:

DHT21 digital temperature and humidity sensor is a calibration with digital signal output temperature and humidity composite sensor. It uses a dedicated digital module acquisition technology and temperature and humidity sensing technology to ensure that the product has a very high reliability and excellent long-term stability. The sensor includes a capacitive wetting element and an NTC temperature measuring element and is connected to a high performance 8-bit microcontroller. So the product has excellent quality, ultra-fast response, anti-interference ability, cost-effective and so on. Each DHT21 sensor is calibrated in an extremely accurate humidity calibration room. The calibration coefficients are stored in OTP memory in the form of a program, and these calibration coefficients are called internally during the processing of the detection signal. Single-wire serial interface, the system integration has become simple and quick. Ultra-small size, very low power consumption, signal transmission distance of up to 20 meters or more, making it the most demanding applications for all types of applications. The product is a 4-pin single-pin package. Easy to connect, special package can be provided in accordance with user needs.

Application areas:

1) HVAC 2) testing and testing equipment

3) car 4) data logger

5) consumer goods 6) automatic control

7) Weather station            8) home appliances

9) Humidity regulator        10) medical treatment

Parameters: 
Model Measuring range Temperature range Temperature measurement accuracy Accuracy Resolution   
DHT21 0-100% RH -40 ~ 80 ℃ ± 3% RH ± 0.5 ℃ 0.1 

Interchangeability is fully interchangeable 

Long-term stability <± 1% RH / year