DHT21 Temperature and Humidity Sensor - AM2301

DHT21 Temperature and Humidity Sensor - AM2301

The DHT21 temperature and humidity sensor is a low-cost, digital device that uses the AM2301 sensor module to measure ambient temperature and relative humidity. The DHT21 is based on the single-wire bidirectional communication protocol and is designed for easy integration with microcontrollers. The sensor uses a capacitive humidity sensing element and a thermistor to accurately measure the temperature and humidity of the surrounding environment. The AM2301 sensor module, also known as the DHT21, is a low-cost, highly accurate and reliable device that is widely used in various applications such as HVAC systems, agriculture, and weather monitoring. The AM2301 uses a proprietary temperature and humidity sensing technology that allows it to achieve high accuracy and stability even in harsh environmental conditions. The DHT21 temperature and humidity sensor provides a simple and reliable solution for monitoring the environmental conditions in a variety of applications. The device is equipped with a number of features such as a fast response time, high accuracy, and a wide operating temperature range. The sensor also supports long-term stability and reliability, making it an ideal choice for applications that require consistent and accurate measurements over an extended period of time. In conclusion, the DHT21 temperature and humidity sensor and the AM2301 sensor module are highly versatile devices that offer a cost-effective solution for monitoring temperature and humidity in various applications. Their robust design, high accuracy, and reliability make them a popular choice for professionals in the HVAC, agriculture, and weather monitoring industries.

The DHT21 temperature and humidity sensor is an advanced sensor unit that outputs a calibrated digital signal. It is highly reliable and stable for long-term use and includes an 8-bit microprocessor for fast and high-quality response. It can measure temperature with a +/-1°C error range between -40 to 80°C and humidity with a +/-5% RH error range between 0-100% RH. The sensor results can be obtained with a 2-second measurement period due to the sensor data collection period. Although it is slightly larger in size compared to other DHT models, the DHT21 is still a reliable and accurate device for temperature and humidity sensing.

• HVAC systems: The DHT21 can be used to monitor the temperature and humidity levels in heating, ventilation, and air conditioning systems to ensure optimal indoor comfort and air quality.

• Agriculture: The DHT21 can be used in agriculture to monitor the temperature and humidity levels in greenhouses, fields, and storage facilities. This information can be used to optimize crop growth and protect against mold and pests.

• Weather monitoring: The DHT21 can be used to monitor temperature and humidity levels in meteorological stations to gather accurate data for weather forecasting and climate studies.

• Home automation: The DHT21 can be used in smart home systems to monitor indoor temperature and humidity levels, enabling automated control of HVAC systems and other home appliances.

• Medical applications: The DHT21 can be used in medical environments to monitor temperature and humidity levels for ensuring appropriate conditions for storage and transport of medical supplies and equipment.

• Environmental monitoring: The DHT21 can be used in environmental monitoring systems to track temperature and humidity levels in various locations to study the effects of climate change and weather patterns.

These are just a few examples of the many applications for the DHT21 temperature and humidity sensor. Its compact size, low cost, and high accuracy make it a versatile device for monitoring temperature and humidity levels in a wide range of industries and applications

Features:

• It is one of the high performance models of the DHT series.
• It gives digital output.
• Operating Voltage: 3.3-5 VDC
• Measuring Range:
• Humidity: 0-100%RH
• Temperature: -40 - 80 °C
• Sensibility:
• Humidity: +/- 3% (Max 5%) RH
• Temperature: < +/- 1°C
• Measurement Period: 2 s
• Product Dimensions: 27x59x13.5 mm

Note: All DHT models have similar features, so applications made with one model can also be applied to other models.

Documents : 

• Click for product datasheet.
• Click for Arduino DHT sensor page.