Gravity: LTR390 UV Light Sensor (280nm-430nm, UVA, UVB)

The Gravity: LTR390 UV Light Sensor from DFRobot is designed for both UV light detection and ambient light sensing. It features a UV spectral response range of 280nm to 430nm and provides raw digital data output for accurate light monitoring applications.

The module offers high sensitivity, fast response, and strong anti-interference performance. With its built-in ADC and MCU, the sensor converts light measurements into digital signals that can be read through either I2C or UART communication.

This sensor is suitable for UV intensity monitoring, ambient light detection, weather experiments, outdoor UV detection, and educational light-sensing projects.

Features

Supports both I2C and UART communication
Compatible with 3.3V and 5V systems
Effective resolution from 13 to 20 bits
Adjustable gain settings: 1, 3, 6, 9, and 18
Interrupt function with programmable upper and lower thresholds
UV spectral response from 280nm to 430nm
Ambient light spectral response close to the human eye

Digital output for easy integration with microcontrollers

Applications

UV intensity detection
Ambient light intensity detection
UV index monitoring devices
Outdoor UV detection systems
Weather and environmental experiments
Educational light detection experiments
Smart lighting and light-monitoring projects

Specifications

Chip: LTR390-UV-01
Operating Voltage: DC 3.3V to 5V
Operating Current: Approximately 2.73mA
18-bit data acquisition with 100ms acquisition time
Communication Interface: I2C / UART
UV Response Wavelength: 280nm to 430nm
ALS Spectral Response Wavelength: 450nm to 700nm
Output Type: Digital output
Dimensions: 32 × 27mm / 1.26 × 1.06 inch

Package Includes

1 × Gravity: LTR390 UV Light Sensor
1 × Gravity 4-Pin I2C/UART Sensor Cable