DHT22 Digital Temperature Humidity Sensor Module

The DHT22 Digital Temperature and Humidity Sensor Module AM2302 is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and spits out a digital signal on the data pin (no analog input pins needed).

It’s fairly simple to use but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so sensor readings can be up to 2 seconds old when using our library.

Note: The color of the connecting wire may vary. You may get any color while shipping.

Where DHT22 Sensor is Used?

The DHT22 is a commonly used Temperature and humidity sensor. The sensor comes with a dedicated NTC to measure temperature and an 8-bit microcontroller to output the values of temperature and humidity as serial data. The sensor is also factory-calibrated and hence easy to interface with other microcontrollers.

The sensor can measure temperature from -40°C to 80°C and humidity from 0% to 100% with an accuracy of ±1°C and ±1%. So if you are looking to measure in this range then this sensor might be the right choice for you.

Applications:

HVAC (Heating Ventilation Air Conditioning), dehumidifiers, testing and inspection equipment, consumer goods, automotive, automation, data loggers, home appliances, humidity regulator , medica weather stations, and other related humidity detection control.

• Measure temperature and humidity
• Local Weather station
• Automatic climate control
• Environment monitoring

Features:

• High precision
• Capacitive type
• Full range temperature compensated
• Relative humidity and temperature measurement
• Calibrated digital signal
• Outstanding long-term stability
• Extra components not needed
• Long transmission distance
• Low power consumption
• 4 pins packaged and fully interchangeable
• Measuring range: temperature -40-80 ℃; humidity 0; 99.9%RH
• Measurement accuracy (25℃): temperature: + 0.5; humidity: + 2%RH (10; 90%RH)
• Resolution: temperature: 0.1 ℃, humidity: 0.1%RH
• Attenuation value: temperature: <1℃ / year; humidity: < 1%RH/ years
• Sensor type: temperature: resistance type sensor; humidity: capacitive sensor
• Response time: temperature: 5S; humidity: 5S 1/e (63%)
• Work within the scope: -40-80℃
• Power source: DC3.3-5.5V
• Shell material: PC plastic
• Weight:10g
• Color: White

Specifications:

• Operating Voltage: 3.5V to 5.5V
• Operating current: 0.3mA (measuring) 60uA (standby)
• Output: Serial data
• Temperature Range: -40°C to 80°C
• Humidity Range: 0% to 100%
• Resolution: Temperature and Humidity both are 16-bit
• Accuracy: ±0.5°C and ±1%
• Size: 38 x 20mm.

Module interface description:

PACKAGE INCLUDES :

1 x DHT22 Digital Temperature and Humidity Sensor Module.

1 x Connecting Cable.