Sensirion SHT30 - humidity and temperature sensor with I2C interface

Sensirion SHT30 is relative humidity and temperature sensor. It has good accuracy (0.2 °C for temperature and 2 percent points for humidity). This accuracy is in 0-65°C temperature range and 10-90% RH range. In case You need wider ranges with such accuracy, then SHT31 is what You need.

What is also interesting in this sensor is ALARM pin. At sensor start You can program humidity and/or temperature levels. When measurements are outside of this range pin ALARM is in high state. This allows monitor parameters w/o microcontroller intervention. Pin ALARM can wake up µc or (as in our HECA) can be used to drive MOSFET.

Links:

• Library: Closed Cube SHT3x
• More info about sensors on Sensirion.com: SHT3x RH/T sensors

Specification:

• Sensor: Sensirion SHT30
• Measurement range - -40°C- 125°C, 0-100% RH
• Interface: I2C
• I2C Address: 0x44 lub 0x45
• Board size: 13x10.5mm
• Mounting hole: M3
• Brought out pin ALERT