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DHT11 Temperature and Humidity Sensor
Recommended Measurement Range (Humidity) | 20% - 80% | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Recommended Measurement Range (Temperature) | 0 - 50 °C | ||||||||
Humidity and Temperature Tolerance in Recommended Range | ±5% / ±2°C | ||||||||
Supply Voltage | 3 - 5V | ||||||||
Measurement Frequency | 1 second | ||||||||
Dimension(s) | 15.5mm x 12mm x 5.5mm | ||||||||
DHT11 is a digital sensor capable of measuring temperature and humidity. Due to its ease of use and low cost, it is commonly preferred in hobby projects and educational applications. It is typically used with Arduino and similar microcontroller platforms and is ideal for monitoring indoor environmental conditions.
The DHT11 sensor measures ambient temperature and humidity. These readings are displayed in real time on an LCD screen. In advanced versions, this data can be transmitted over the internet for remote monitoring.
A DHT11 sensor placed inside a greenhouse continuously monitors environmental conditions. When humidity falls below a set threshold, an automatic irrigation system is activated. Similarly, when temperature rises excessively, ventilation fans can be triggered.
A simple control system can be designed to turn a fan on or off based on humidity data from the DHT11 sensor. This system can be used to automate ventilation needs in small enclosed spaces.
Adafruit. "DHT Sensor Library Example Code." Accessed May 25, 2025. https://github.com/adafruit/DHT-sensor-library
Adafruit. "DHT Temperature & Humidity Sensors." Accessed May 24, 2025. https://learn.adafruit.com/dht/overview.
DHT11 Temperature and Humidity Sensor
Recommended Measurement Range (Humidity) | 20% - 80% | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Recommended Measurement Range (Temperature) | 0 - 50 °C | ||||||||
Humidity and Temperature Tolerance in Recommended Range | ±5% / ±2°C | ||||||||
Supply Voltage | 3 - 5V | ||||||||
Measurement Frequency | 1 second | ||||||||
Dimension(s) | 15.5mm x 12mm x 5.5mm | ||||||||
Technical Specifications Table
Various Applications
Digital Weather Station with Arduino
Smart Greenhouse Monitoring System
Humidity-Controlled Fan System