# UVA and UVB sensor module, GY-8511, Analog, 3.3V

- Page: https://sigmanortec.ro/en/uva-and-uvb-sensor-module-gy-8511-analog-33v
- Price: 129.24 RON
- Availability: In stock; 1-2 zile
- Reference: 88089 · EAN: 5948768823491
- Category: Mechatronics and IoT > Sensors and Modules > Light and Optical Sensors
- Specifications: Input Voltage: 3.3 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.
- Package (shipping data): 0.003 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 05:45 (Europe/Bucharest)

## Description

The ML8511 sensor module accurately measures UVA and UVB radiation intensity for educational projects, laboratory or solar monitoring, operates at 3.3V and provides easy-to-read linear analog output with Arduino, ESP32 or Raspberry Pi, covers 280–390 nm and SOI CMOS integration ensures stable signal with low noise in a compact form factor.
The GY-8511 module with ML8511 sensor, compatible with Arduino and other development boards, is designed for precise measurement of ultraviolet rays intensity in the UVA and UVB spectrum, making it ideal for educational projects, laboratory experiments, and applications for monitoring exposure to solar radiation. It operates at a voltage of 3.3V and provides a linear analog output proportional to the intensity of UV light, expressed in mW/cm².
The sensor detects ultraviolet radiation in the range of 280–390 nm, covering both the UVB area, responsible for sunburns, and a large part of the UVA area, associated with the tanning process.
Thanks to the SOI CMOS technology developed by OKI, the GY-8511 module integrates both the UV detection element and the operational amplifier in the same chip, eliminating the need for additional external circuits. This architecture ensures a stable output voltage, increased measurement accuracy, and a low noise level in the signal.
The compact design, measuring only 13 x 11 mm, allows easy integration into any type of project, and its weight of only 5 grams makes it suitable for portable applications or mounting on drones, weather stations, or laboratory devices.
The module can be easily connected to boards such as Arduino, ESP32, or Raspberry Pi, being fully compatible with most analog-to-digital conversions used on these platforms.
Specifications:
Detection: UVA and UVB rays (280–390 nm)
Supply voltage: 3.3V
Output voltage: Proportional to UV intensity (mW/cm²)
Weight: 5 g
Technology: SOI CMOS OKI
Output type: Analog
Dimensions: 13 x 11 mm
Pinout:
Pin
Description
3.3V
Power supply at 3.3V
GND
Ground
OUT
Analog output connected to A0
EN
Enable pin connected to 3.3V
Optional 3.3V reference
Can be connected to A1 for reference measurement
Usage:
Power the module at 3.3V (DO NOT use 5V).
Connect the OUT pin to an analog input (e.g., A0).
Optionally, connect the 3.3V reference to A1 for more accurate measurements.
Use the example code to read analog values and calculate UV intensity.
Position the sensor at a direct angle towards the UV source, without obstacles or reflections.
Allow the sensor to thermally stabilize for about 1 minute before reading.
For outdoor applications, protect the module against moisture and dust.
Calibrate the results by comparison with a standard instrument if necessary.
Usage tips:
Avoid artificial light sources with variable UV spectrum.
Mount the sensor in areas directly exposed to sunlight.
Use averaging of multiple readings to reduce measurement noise.