The DHT11 Humidity And Temperature Sensor Module measures both air temperature and relative humidity (the amount of water vapour in air compared to its maximum capacity) from a single digital output pin. The dht11 humidity and temperature sensor operates on 3.3V to 5V DC and covers a temperature range of 0°C to 50°C with a humidity range of 20 to 95 percent RH. An onboard LED confirms active power at a glance.
The dht11 humidity and temp sensor uses a resistive humidity element (a component whose electrical resistance changes as it absorbs moisture from surrounding air) paired with a thermistor (a temperature-sensitive resistor). One non-obvious detail — the DHT11 can only update its reading once per second. Polling it faster returns the same old reading, not a fresh measurement. The honest limitation is accuracy at plus or minus 5 percent RH and plus or minus 2°C, which suits trend monitoring better than precise measurement.
The dht11 humidity sensor makes it a popular first sensor for students and hobbyists. The dht11 temperature and humidity sensor 3 pins connects to Arduino, ESP32, and Raspberry Pi GPIO pins. Connect VCC, GND, and data, install the DHT library in Arduino IDE, then run the example sketch. StemVolt provide this sensor module tested for confirmed digital output at rated voltage.
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Features:
- Humidity range from 20 to 95 percent RH covers typical room and greenhouse moisture conditions fully
- Digital output at 16-bit resolution gives finer reading steps than basic analog sensors provide
- 3pin dht11 sensor onboard LED indicator confirms active power without needing a multimeter check
Technical specifications:
| Specification | Details |
|---|---|
| Sensor Type | DHT11 Digital humidity and temperature |
| Indicator | LED |
| Measuring Temperature | 0 ~ 50 °C |
| Resolution | 16 bit |
| Output | Digital |
| Supply Voltage | 3.3 ~ 5 V |
| Humidity Measurement Range | 20% ~ 95% RH |
Applications:
- Plant care monitor uses this to track air humidity and alert when moisture drops too low
- DHT11 Humidity And Temperature Sensor Module reads indoor conditions and logs data to an SD card
- Weather station project reads 0 to 50 degree range and sends hourly readings to an ESP32 dashboard
- Greenhouse automation reads humidity at 20 to 95 percent RH range and triggers a ventilation fan via GPIO output
Package includes:
- 1 x DHT11 Humidity And Temperature Sensor Module
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