DHT21 AM2301 Temperature Humidity Sensor is a digital sensor module that measures two important environmental parameters: temperature and relative humidity. It combines the sensing elements and signal-processing electronics into one convenient module, providing calibrated digital output that can be read by compatible microcontrollers.
The sensor is commonly used in Arduino, robotics, automation, environmental monitoring and DIY electronics projects.
Temperature & Humidity Measurement
The DHT21 AM2301 Temperature Humidity Sensor can measure temperatures from approximately -40°C to 80°C and relative humidity from 0 to 100% RH. Typical published specifications give temperature accuracy of around ±0.5°C and humidity accuracy of ±3% RH.
This combination allows one sensor to provide both temperature and humidity information, making it useful for projects where environmental conditions need to be monitored.
Digital Output
The sensor provides a digital signal output, allowing it to communicate directly with compatible microcontrollers through its digital interface. This makes it convenient for electronics projects because the temperature and humidity readings can be processed by a microcontroller and displayed, logged or used to trigger other devices.
Arduino & Microcontroller Projects
The DHT21 AM2301 Temperature Humidity Sensor is suitable for Arduino and other compatible microcontroller platforms. It can be incorporated into projects that need to monitor environmental conditions and respond automatically to changes in temperature or humidity.
It can be used alongside development boards, displays, relays, fans and other electronic components to create automated monitoring and control systems.
Wide Temperature Range
With a temperature measurement range extending from -40°C to 80°C, the DHT21 AM2301 can be used for a variety of indoor and outdoor monitoring projects.
The wide range makes it useful for applications where temperature conditions can vary significantly.
Humidity Monitoring
The DHT21 AM2301 Temperature Humidity Sensor provides relative humidity measurements across a range of 0–100% RH. This allows projects to monitor moisture levels in the surrounding air.
Humidity data can be useful in environmental monitoring, weather projects, storage monitoring, greenhouse systems and other applications where relative humidity is important.
Low Power Consumption
The DHT21 AM2301 is designed for low-power operation, making it suitable for electronics projects where energy consumption is an important consideration. Published specifications list average current consumption in the low-microamp range.
Long-Distance Signal Transmission
The sensor is designed to support relatively long signal transmission distances, making it useful for projects where the sensor needs to be positioned away from the main controller. Published specifications cite transmission distances of up to approximately 20 metres under suitable conditions. SHOP
Why Choose the DHT21 AM2301?
| Benefits | Benefits |
|---|---|
| Measures temperature & humidity | Digital output |
| -40°C to 80°C range | 0–100% RH range |
| ±0.5°C temperature accuracy | ±3% RH humidity accuracy |
| 0.1°C resolution | 3.3–5.2V operation |
| Low power consumption | Suitable for Arduino |
| Useful for IoT projects | Ideal for robotics |
Applications
| Automation & Monitoring | Electronics & Education |
|---|---|
| Environmental monitoring | Arduino projects |
| Weather stations | Robotics |
| Greenhouse monitoring | IoT projects |
| Temperature logging | Electronics experiments |
| Humidity monitoring | School projects |
| Smart home systems | DIY automation |
Suitable For
| Users | Projects |
|---|---|
| Electronics hobbyists | Arduino projects |
| Robotics enthusiasts | Robotics systems |
| Students | School projects |
| Engineers | Automation |
| IoT developers | Environmental monitoring |
| DIY makers | Smart home projects |
Product Specifications
| Specification | Details |
|---|---|
| Model | DHT21 / AM2301 |
| Sensor Type | Digital temperature & humidity sensor |
| Supply Voltage | 3.3–5.2V DC |
| Temperature Range | -40°C to 80°C |
| Humidity Range | 0–100% RH |
| Temperature Accuracy | ±0.5°C |
| Humidity Accuracy | ±3% RH |
| Resolution | 0.1°C / 0.1% RH |
| Output | Digital |
| Communication | Single-bus digital signal |
| Dimensions | Approx. 59 × 27 × 14mm |
The published specifications for the DHT21/AM2301 consistently identify it as a calibrated digital temperature and humidity sensor with a -40°C to 80°C temperature range and approximately 0–100% RH humidity range. Facebook
Package Includes
| Package Contents | Package Contents |
|---|---|
| 1 × DHT21 / AM2301 Sensor Module | Digital temperature & humidity sensor |
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