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About Lux Meter Tag

The Lux Meter Tag uses a high dynamic range light intensity sensor OPT3001 that can measure illuminance from 0.01 to 83,000 lux. This sensor is digital and calibrated. It communicates using an I²C bus and features a very low power operation and shutdown mode.


You can use the sensor to detect day and night or it could be used as auxiliary information about someone’s presence.


  • Digital ambient light sensor OPT3001 (TI)
  • Communication using the I²C bus
  • Measures in the range from 0.01 to 83,000 lux
  • 23-bit effective dynamic range
  • Optional interrupt output
  • Power consumption:
    • Active current: 1.8 µA
    • Shutdown current: 0.3 µA
  • Operating voltage range: 1.6 V to 3.6 V
  • Operating temperature range: -20 to 70 °C
  • Mechanical dimensions: 16 x 16 mm