Sensirion SHT40 Digital Temperature & Humidity Sensor - Stainless Steel Probe w/ 1m Cable

The SHT40 sensor typically operates from 2.3V to 5.5V DC. It is compatible with both 3.3V and 5V logic systems commonly found on Arduino, Raspberry Pi, and ESP32 boards. Always ensure your power supply is within this specified range for reliable operation.

Connect the SHT40's I2C data (SDA) and clock (SCL) lines to the corresponding pins on your microcontroller, along with VCC and GND. The sensor uses a standard I2C protocol. You will need to use a dedicated library (such as the Sensirion SHT4x library for Arduino) to read temperature and humidity data via simple function calls.

Yes, the stainless steel housing provides excellent corrosion resistance, making the probe suitable for damp, humid, or mildly corrosive industrial environments. However, it is not a fully submersible or hermetically sealed unit; for direct liquid immersion, a sensor with a specific IP68 or IP69K rating would be required.

The SHT40 is factory calibrated, providing typical accuracies of ±0.3°C for temperature and ±3% RH for humidity. No user calibration is required for most applications. For the highest precision in critical applications, the sensor's advanced algorithm mode can be used to achieve even lower measurement uncertainty.