DHT22 temperature sensor - humidity, -40 to +80 °C, with cable
DHT22 temperature sensor - humidity, -40 to +80 °C, with cable
This goes with it
Pay in 30 days
Pay in 30 days
Description
Product overview
- Combined temperature and humidity sensor for digital applications
- Temperature measurement range, −40 °C to +80 °C
- Humidity measurement range, 0 % to 100 % relative humidity
- Accuracy of ±0.5 °C and ±2 % humidity
- Digital output via single-wire protocol
- With connection cable and resistor network on the circuit board
- Typical polling rate approximately every two seconds
Product description
This temperature and humidity sensor measures two parameters simultaneously and outputs the values digitally. The single-wire protocol enables connection to microcontroller boards using just one signal pin; the integrated resistor network on the circuit board eliminates the need for additional components. The included cable allows use without soldering.
The sensor measures temperatures from −40 °C to +80 °C and humidity between 0 % and 100 % with an accuracy of ±0.5 °C and ±2 %, respectively. The measured values are available approximately every two seconds. The low current consumption in the low milliampere range is suitable for battery-powered applications.
Applications include climate monitoring in rooms, greenhouses or warehouses, outdoor weather stations, humidity logging in transport boxes, and monitoring storage conditions for sensitive materials. The sensor is particularly popular in hobby projects involving air quality and environmental monitoring, as the combination of ease of use and acceptable accuracy offers good value for money.
The sensor requires an operating voltage of 3.3 V to 5.5 V. For long-term measurements lasting many hours, a stable power supply is recommended; when operating on batteries, the polling rate should be reduced as needed. Digital interfaces to other components require level shifting if the microcontroller uses 3.3 V logic while the power supply provides 5 V.
Safety information
The sensor is not intended for installation in household electrical circuits and may only be used for building prototypes and for testing and development purposes. Direct contact with the sensor during measurement is not critical; when working on or near the power supply, consult a qualified electrician if you are unsure.