DFRobot Gravity: LTR390 UV Light Sensor (280nm to 430nm) – I2C & UART


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SKU: 1495700
  1.  Provides both ambient light and UV sensing with UV spectral response from 280nm to 430nm
  2. High sensitivity
  3. Quick response
  4. Strong anti-interference ability
  5. Adjustable gain range: 1, 3, 6, 9 and 18


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Brand: DF Robot
Category: Light/color Sensor

This Gravity: LTR390-UV sensor from DFRobot provides both ambient light and UV sensing with UV spectral response from 280nm to 430nm and raw data output. It features high sensitivity, quick response, and strong anti-interference ability.
With built-in ADC and MCU, this UV module can convert light data to a digital signal capable of being directly output via I2C or UART interface. This Gravity: LTR390 UV Light Sensor can be used for light experiments, outdoor UV detection, and other scenarios requiring UV or ambient light monitoring.


  1. UV intensity detection
  2. Light intensity detection
  3. Weather experiments for teaching
  4. Light detection experiments
  5. Devices for monitoring UV index
  6. Devices for outdoor UV detection


  1. Support I2C and UART communication
  2. 3.3V & 5V compatible
  3. 13 to 20 bits effective resolution
  4. Interrupt function, programmable upper and lower thresholds
  5. Close to human eye spectral response

Packages Includes:

1 x DFRobot Gravity: LTR390 UV Light Sensor (280nm to 430nm) – I2C & UART

SKU: 1495700 Category:


Operating Voltage

DC 3.3V to 5V

Operating Current

about 2.73mA (18-bit data acquisition with a time of 100ms)

Communication Interface


I2C Address


UV Response Wavelength

280nm to 430nm

ALS Spectral Response Wavelength

450nm to 700nm

Output Type

digital output



Shipping Weight 0.015 kg
Shipping Dimensions 6 × 5 × 3 cm
6 Months Warranty

This item is covered with a supplier warranty of 6 months from the time of delivery against manufacturing defects only. This is a quality product from the original manufacturer. Only manufacturing defects are covered under this warranty. Reimbursement or replacement will be done against manufacturing defects.

What voids the warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China