Industrial Grade High Accuracy Temperature Sensor {±0.4 °C (max), –10 to 85 °C}
0 to 100% RH operating range. Up to –40 to +125 °C operating a range
Wide operating voltage (1.9 to 3.6 V)
Compatible with Arduino, Raspberry Pi, NodeMCU and other microcontrollers
Details:
Si7021 offers better accuracy and a wider range for temperature and humidity readings, as compared to DHT11 and DHT22. It also comes in a significantly smaller size as compared to the former 2 sensors. The Si7021 has ±0.4 °C temperature accuracy at a range of -10 to +85 °C± and 3% relative humidity measurements with a range of 0–80% RH. It is perfect for environmental monitoring projects and uses the I2C interface for data transfer which makes it compatible with the majority of available microcontrollers.