Original stock DHT21/AM2301 capacitive digital temperature and humidity sensor replaces SHT10 SHT11
Product Descriptions：
Attention: DHT21 has been renamed as AM2301
1. Relative humidity and temperature measurement
2. All calibration, digital output
3. Long term stability
4. No additional components required
5. Ultra long signal transmission distance
6. Ultra low energy consumption
7. 4-pin installation
8. Complete Swap
AM2301/DHT21 Product Overview
AM2301/DHT21 digital temperature and humidity sensor is a temperature and humidity composite sensor with calibrated digital signal output. It applies 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 to a high-performance 8-bit microcontroller. Therefore, this product has the advantages of quality, ultra fast response, strong anti-interference ability, and extremely high cost-effectiveness. Each AM2301/DHT21 sensor is calibrated in an extremely humid calibration room. The calibration coefficients are stored in the OTP memory in the form of programs, and these calibration coefficients need to be called during the processing of detection signals inside the sensor. Single line serial interface makes system integration simple and fast. Its ultra small size, extremely low power consumption, and signal transmission distance of over 20 meters make it an ideal choice for various applications, even for demanding ones. The product is a 4-pin single row pin package. Easy to connect, special packaging forms can be provided according to user needs.
Application area
Heating, Ventilation, and Air Conditioning Testing and Inspection Equipment
Car Data logger
Consumer goods Auto-Control
Meteorological station Household electrical appliances
Humidity regulator Medical care
Dehumidifier
1、Sensor Performance Description
Parameter | Condition | Min | Typ | Max | Company | |||
Humidity | ||||||||
Resolving power | 0.1 | %RH | ||||||
16 | Bit | |||||||
Repeatability | ±1 | %RH | ||||||
Accuracy | 25℃ | ±3 | %RH | |||||
0－50℃ | ±5 | %RH | ||||||
Interchangeability | Fully interchangeable | |||||||
Sampling period | 1.7 | 2 | S | |||||
Response time | 1/e(63%)25℃，1m/s Air | 5 | S | |||||
Delay | ±1 | %RH | ||||||
Long term stability | Typical values | ±1 | %RH/yr | |||||
Temperature | ||||||||
Resolving power
| 0.1 | ℃ | ||||||
16 | Bit | |||||||
Repeatability | ±0.5 | ℃ | ||||||
Accuracy | ±1 | ℃ | ||||||
Range of measurement | -20 | 60 | ℃ | |||||
Response time | 1/e(63%) | 6 | 20 | S | ||||
