The Waveshare Digital LTR390-UV Ultraviolet Sensor (C) is an I2C digital UV sensor module that incorporates LTR390-UV-01, designed for measuring ultraviolet rays as well as visible light and providing light intensity value output. With features including sensitive detection, fast response, and a small form factor, the UV Sensor (C) integrates the main sensor LTR390-UV-01 on its 27 × 20 mm body, allowing easy integration into other devices.
- Incorporates LTR390-UV-01 for measuring ultraviolet rays and visible light.
- Embedded ADC, direct light intensity value output via I2C bus, less noise interference.
- Supports interrupt output, programmable upper/lower threshold.
- Onboard voltage translator, compatible with 3.3V/5V operating voltages.
- Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32).
Specifications
| Sensor | LTR390-UV-01 | Response Spectrum | 280 - 430nm |
|---|---|---|---|
| Communication bus | I2C (constant address: 0x53) | Operating voltage | 3.3V/5V |
| Dimensions | 27 × 20mm | Mounting hole size | 2.0mm |
| VCC | 3.3V/5V power input |
| GND | GND |
| SDA | connects to MCU I2C data pin |
| SCL | connects to MCU I2C clock pin |
| INT | GPIO input, triggering pulse signal on interruption |
Hardware connection
Connecting with Raspberry Pi
Connecting with Arduino board
Dimensions
Selection guide
| UV Sensor | UV Sensor (C) | |
|---|---|---|
| Sensor | GUVA-S12SD | LTR390-UV-01 |
| Hardware interface | analog output | I2C |
| Calibration Required | Yes, the analog output needs to be turned into UV index value | No, direct outputs UV index value |
| Intensity Measuring | N/A | Yes |
| Interrupt Output | N/A | Yes |
| UV Response Spectrum | 200-370nm | 280-430nm |
| Dimensions | 22 × 16mm | 27 × 20mm |