GY-21 SI7021 Temperature and Humidity Sensor Module with I2C Interface

Description
SI7021 I2C Humidity and Temperature Sensor is a monolithic CMOS IC integrating humidity and temperature sensor. Precision Relative Humidity Sensor, High Accuracy Temperature Sensor. SI7021 offers an accurate, low-power, factory-calibrated digital solution ideal for measuring humidity, dew-point, and temperatur.
SI7021 humidity and temperature sensors are factory-calibrated and the calibration data is stored in the on-chip non-volatile memory. This ensures that the sensors are fully interchangeable, with no recalibration or software changes required.
Low Power Consumption 150 μA active current, Excellent long term stability.

Features
Precision Relative Humidity Sensor
± 3% RH (max), 0–80% RH
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 range
Wide operating voltage (1.9 to 3.6 V)
Low Power Consumption 150 μA active current
60 nA standby current
Factory-calibrated
I2C Interface
Integrated on-chip heater
Excellent long term stability
Optional factory-installed cover
Low-profile