5.74 €
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DHT22 Temperature and Humidity Sensor Compatible with Arduino
Brand: satkit
Save 7% Was: 6.15 €
5.74€
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The DHT22 Temperature and Humidity Sensor is an electronic device designed to measure ambient temperature and humidity accurately, and is fully compatible with Arduino platforms. This sensor is ideal for electronics projects that require reliable, detailed data on environmental conditions.
Key features:
- Operating voltage: 3V to 5.5V, allowing use in a range of electronic setups.
- Relative humidity range: from 0% to 99.9%, suitable for very dry or humid environments.
- Temperature range: from -40ºC to 80ºC, covering a wide range for different applications.
- Decimal resolution: temperature and humidity values are provided to one decimal place for greater accuracy.
- Sampling time: every 2 seconds, enough for continuous monitoring without overloading the system.
- Accuracy: ±2%RH for relative humidity at 25ºC and ±1ºC for temperature, ensuring reliable measurements.
Typical uses:
- Environmental monitoring in Arduino home automation projects.
- Home or educational weather stations.
- Condition control in greenhouses or enclosed spaces.
- Robotics applications that require climate data.
Compatibility: This sensor is designed to integrate easily with Arduino boards, making connection and programming straightforward using libraries available in the community. It is compatible with different Arduino models that support digital inputs and power within the stated range.
In summary, the DHT22 Sensor is a reliable and accurate option for anyone looking to measure temperature and humidity in electronic projects, with the advantage of its wide measurement range and Arduino compatibility.
- Operating voltage: 3V - 5.5V
- Relative humidity range: 0% to 99.9%
- Temperature range: -40ºC to 80ºC
- Decimal resolution for accurate data
- Sampling time: 2 seconds
- Humidity accuracy: ±2%RH at 25ºC
- Temperature accuracy: ±1ºC
- Compatible with Arduino for electronics projects
Customer Questions & Answers
What functional and accuracy difference does the DHT22 have compared with cheaper sensors such as the DHT11?
The DHT22 offers a wider range (-40°C to 80°C for temperature and 0 to 99.9% for humidity) and greater accuracy (±1°C and ±2%RH) than the DHT11, which measures only from 0°C to 50°C and 20% to 80% humidity with lower accuracy and integer resolution. For applications requiring decimal data and extreme ranges, the DHT22 is objectively superior.
What are the dimensions and approximate weight of the DHT22 sensor, and what exactly is included in the box when buying it?
The DHT22 sensor measures approximately 23 mm x 15 mm x 8 mm and weighs around 2 grams. The standard purchase usually includes only the sensor, without cables or additional accessories, unless otherwise specified by the seller.
Can the DHT22 operate directly at 3.3 V or does it need any additional component to work with low-voltage microcontrollers?
The DHT22 is specified to operate between 3 V and 5.5 V, which allows it to be connected directly to most microcontrollers, including those with 3.3 V logic, without the need for voltage level conversion or additional components.
What is the minimum reading interval and are there limitations if you try to sample data faster?
The DHT22 has a minimum sampling time of 2 seconds; if a reading is requested before that interval, the sensor will return repeated or incorrect data. In applications requiring frequent data acquisition, this is a relevant limitation compared with faster-response sensors.
Is the DHT22 protected against direct ambient humidity or is additional encapsulation needed to improve durability?
The DHT22 has a basic plastic housing that protects against dust, but it is not sealed. Continuous exposure to condensation or splashes is not recommended. For extremely humid environments, it is advisable to enclose it in air-permeable but water-repellent housings to extend its service life.
Which Arduino boards is the DHT22 sensor compatible with?
The DHT22 sensor is compatible with most Arduino boards that support digital inputs and power between 3V and 5.5V, such as Arduino Uno, Mega and Nano.
What temperature range does the DHT22 sensor measure?
The DHT22 sensor measures temperatures from -40ºC to 80ºC with an accuracy of ±1ºC.
How often is the sensor data updated?
The DHT22 sensor data is updated every 2 seconds, allowing continuous monitoring without overloading the system.
What accuracy does the sensor have for measuring humidity?
The accuracy for relative humidity is ±2%RH at a temperature of 25ºC.
Can the DHT22 sensor be used for home automation projects?
Yes, the DHT22 sensor is ideal for home automation projects thanks to its accuracy and Arduino compatibility.
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