DHT11 is a basic, ultra-low cost digital temperature and humidity sensor.it use a capacitive humidity sensor and a thermistor to measure the surrounding air and spits out a digital signal on the data pin.

Specifications

• Operating voltage: 3.5V to 5.5 V
• Operating current: 0.3mA (measuring) 60uA (standby)
• Output: Serial data
• Temperature range:0⁰C to 50⁰C
• Humidity rage: 20% to 90%
• Resolution: Temperature and humidity both are 16 bit
• Interface: digital

Application

• Measuring various:
• Humidity
• Temperature
• Ventilation
• Air-condition system