ASAIR DHT22 Temperature-Humidity Sensor

The DHT22, also known as the AM2302, is a digital temperature and humidity sensor module. It is widely used in various applications that require accurate measurements of temperature and humidity. The DHT22 is a popular choice among hobbyists, engineers, and researchers due to its reliability and ease of use.

The DHT22 sensor module features a compact design and is typically packaged in a ZIP4 form factor, making it easy to integrate into different projects and systems. It utilizes a single-wire communication protocol, which simplifies its connection to microcontrollers and other devices. The module provides digital output signals for temperature and humidity readings, eliminating the need for analog-to-digital conversion.

With regard to its temperature measurement capabilities, the DHT22 has a wide operating range, typically spanning from -40°C to 80°C (-40°F to 176°F). It offers a high level of accuracy, with a temperature resolution of 0.1°C (0.1°F) and an accuracy of ±0.5°C (±0.9°F).

In terms of humidity measurement, the DHT22 can accurately detect relative humidity ranging from 0% to 100%. It has a humidity resolution of 0.1% and an accuracy of ±2-5%, depending on the specific operating conditions.

​Features and Applications

Here are the key features and applications of the DH2TT:

Key Features:

• Accurate Measurement: The DHT22 sensor provides highly accurate temperature and humidity measurements with a high-quality digital signal output.
• Wide Measurement Range: It can measure temperature in the range of -40°C to 80°C (-40°F to 176°F) with a resolution of 0.1°C, and humidity in the range of 0% to 100% with a resolution of 0.1%.
• Low Power Consumption: The sensor operates on low power, making it suitable for battery-powered devices or applications requiring long-term monitoring.
• Long-term Stability: It features excellent long-term stability in terms of temperature and humidity measurements, providing reliable and consistent data over extended periods.
• Fast Response Time: The DHT22 sensor has a fast response time, allowing for real-time monitoring and quick reaction to changes in temperature and humidity.
• Two-Wire Interface: It utilizes a single-wire digital interface, making it easy to integrate into various systems and microcontrollers.

Applications:

• Weather Monitoring: The DHT22 sensor is widely used in weather stations and climate monitoring systems to measure temperature and humidity levels accurately.
• HVAC Systems: It finds applications in heating, ventilation, and air conditioning (HVAC) systems to monitor and control indoor climate conditions effectively.
• Agriculture and Greenhouses: The sensor is utilized in agriculture and greenhouse applications to ensure optimal environmental conditions for plant growth, preventing excessive moisture or temperature fluctuations.
• Industrial Automation: The DHT22 sensor plays a crucial role in industrial automation systems, where precise temperature and humidity monitoring are essential to maintain product quality and equipment performance.
• Home Automation: It is employed in smart home systems to monitor indoor climate conditions, allowing for intelligent control of heating, cooling, and humidity control devices.
• Data Logging: The DHT22 sensor can be used in data logging applications, where long-term temperature and humidity data are recorded for analysis and decision-making purposes.
• Medical and Laboratory Equipment: It is employed in medical and laboratory equipment where accurate temperature and humidity measurements are crucial for maintaining sample integrity and proper storage conditions.

Specifications

• Shipped from: Shenzhen warehouse
• Shipment way: DHL/Fedex/TNT/UPS/EMS
• Expected Shipping Date: 1 to 3 days
• Our Lead-Time: 5-7 days
• Payment Methods: Bank transfers, Visa & MasterCard, PayPal, Western Union

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