GUVA-S12SD Analog UV Light Sensor Module (240–370 nm)

Detects UV radiation in the 240–370 nm range (UVA & UVB)
Analog output proportional to UV intensity
Built-in operational amplifier for signal boosting
Compatible with 3.3V and 5V systems (operating range: 2.5V–5V)
High sensitivity, accuracy, and long-term stability
Low power consumption – ideal for portable devices
Compact form factor: 11mm × 27mm
Suitable for UV index monitoring, environmental sensing, and wearables

SKU: aA1785 Categories: Light/Color Sensor, Sensors Tags: Light/Color Sensor, Sensors

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Description

Accurately measure ultraviolet radiation for your next environmental or wearable project with the GUVA-S12SD UV Light Sensor Module. Featuring a highly sensitive Schottky-type photodiode, this sensor detects UV radiation in the 240–370 nm spectrum, effectively capturing both UVB and most of the UVA range. An onboard operational amplifier boosts the raw signal to provide a clean, linear analog voltage output that is directly proportional to the ambient UV intensity. With its wide 2.5V to 5V operating range and ultra-low power consumption, it integrates perfectly with standard Arduino, ESP32, or Raspberry Pi Pico systems, making it an excellent choice for portable, battery-powered weather stations and UV index monitors.

Key Features

Broad UV Detection: Accurately measures the 240–370 nm wavelength range, encompassing the critical UVA and UVB spectrums.
Linear Analog Output: Outputs an easy-to-read analog voltage (typically 0–1V) that corresponds directly to the UV index, simplifying microcontroller ADC (Analog-to-Digital Converter) integration.
Onboard Amplification: Features an integrated operational amplifier to stabilize and boost the sensor’s microvolt output to a usable, reliable level.
Energy Efficient: Operates at the microampere level, making it ideal for continuous environmental monitoring in battery-operated or remote IoT nodes.
Wide Compatibility: Operates seamlessly on both 3.3V and 5V logic systems without the need for logic level shifters.

Technical Specifications

Specification	Detail
Sensor Chip	GUVA-S12SD (Schottky-type photodiode)
Detection Wavelength	240 nm – 370 nm (UVA & UVB)
Operating Voltage (VCC)	2.5V – 5V DC
Output Signal	Analog Voltage (Linear, approx. 0V to 1V)
Current Consumption	Microampere (µA) level
Field of View	~130 degrees
Operating Temperature	-20°C to +85°C
Dimensions	~27 mm × 11 mm

🔌

Pin Connections

1 Table

Pin Connections Table 1

Board	Sensor Pin	Connection
GUVA-S12SD	VCC/GND/OUT	3.3-5V / GND / board analog pin

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GUVA-S12SD Analog UV Light Sensor Module (240-370 nm)

7 Examples • C/C++ | Boards: Arduino Uno, Arduino Nano, Arduino Mega, ESP32, ESP8266, STM32, Raspberry Pi Pico

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GUVA-S12SD Analog UV Light Sensor Module (240-370 nm) - Arduino Uno

GUVA-S12SD Analog UV Light Sensor Module (240-370 nm) - Arduino Nano

GUVA-S12SD Analog UV Light Sensor Module (240-370 nm) - Arduino Mega

GUVA-S12SD Analog UV Light Sensor Module (240-370 nm) - ESP32

GUVA-S12SD Analog UV Light Sensor Module (240-370 nm) - ESP8266

GUVA-S12SD Analog UV Light Sensor Module (240-370 nm) - STM32

GUVA-S12SD Analog UV Light Sensor Module (240-370 nm) - Raspberry Pi Pico

📄 File: guva-s12sd_analog_uv_light_sensor_module_(240-370_nm)_-_arduino_uno.inoArduino Uno

436 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin A0 on Arduino Uno

6#define UV_PIN A0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(UV_PIN);

14 float voltage = raw * 5.0 / 1023.0;

15 float uvIndex = voltage / 0.1; // approx per datasheet (~0.1V per UV-index step) - calibrate for your exact module

17 Serial.print("UV Index (approx): "); Serial.println(uvIndex);

18 delay(500);

19}

📄 File: guva-s12sd_analog_uv_light_sensor_module_(240-370_nm)_-_arduino_nano.inoArduino Nano

437 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin A0 on Arduino Nano

6#define UV_PIN A0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(UV_PIN);

14 float voltage = raw * 5.0 / 1023.0;

15 float uvIndex = voltage / 0.1; // approx per datasheet (~0.1V per UV-index step) - calibrate for your exact module

17 Serial.print("UV Index (approx): "); Serial.println(uvIndex);

18 delay(500);

19}

📄 File: guva-s12sd_analog_uv_light_sensor_module_(240-370_nm)_-_arduino_mega.inoArduino Mega

437 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin A0 on Arduino Mega

6#define UV_PIN A0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(UV_PIN);

14 float voltage = raw * 5.0 / 1023.0;

15 float uvIndex = voltage / 0.1; // approx per datasheet (~0.1V per UV-index step) - calibrate for your exact module

17 Serial.print("UV Index (approx): "); Serial.println(uvIndex);

18 delay(500);

19}

📄 File: guva-s12sd_analog_uv_light_sensor_module_(240-370_nm)_-_esp32.inoESP32

430 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin 34 on ESP32

6#define UV_PIN 34

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(UV_PIN);

14 float voltage = raw * 3.3 / 4095.0;

15 float uvIndex = voltage / 0.1; // approx per datasheet (~0.1V per UV-index step) - calibrate for your exact module

17 Serial.print("UV Index (approx): "); Serial.println(uvIndex);

18 delay(500);

19}

📄 File: guva-s12sd_analog_uv_light_sensor_module_(240-370_nm)_-_esp8266.inoESP8266

432 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin A0 on ESP8266

6#define UV_PIN A0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(UV_PIN);

14 float voltage = raw * 3.3 / 1023.0;

15 float uvIndex = voltage / 0.1; // approx per datasheet (~0.1V per UV-index step) - calibrate for your exact module

17 Serial.print("UV Index (approx): "); Serial.println(uvIndex);

18 delay(500);

19}

📄 File: guva-s12sd_analog_uv_light_sensor_module_(240-370_nm)_-_stm32.inoSTM32

432 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin PA0 on STM32

6#define UV_PIN PA0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(UV_PIN);

14 float voltage = raw * 3.3 / 4095.0;

15 float uvIndex = voltage / 0.1; // approx per datasheet (~0.1V per UV-index step) - calibrate for your exact module

17 Serial.print("UV Index (approx): "); Serial.println(uvIndex);

18 delay(500);

19}

📄 File: guva-s12sd_analog_uv_light_sensor_module_(240-370_nm)_-_raspberry_pi_pico.inoRaspberry Pi Pico

442 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin 26 on Raspberry Pi Pico

6#define UV_PIN 26

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(UV_PIN);

14 float voltage = raw * 3.3 / 4095.0;

15 float uvIndex = voltage / 0.1; // approx per datasheet (~0.1V per UV-index step) - calibrate for your exact module

17 Serial.print("UV Index (approx): "); Serial.println(uvIndex);

18 delay(500);

19}

Project Notes:

Analog UV-index sensor.

Specification

WeightWeight	6 g
Dimensions	3 × 2 × 1 cm
sensor-type	Schottky-type photodiode
detection-wavelength	240–370 nm (UVB and UVA)
output-signal	Analog voltage (0–1 V)
operating-voltage	2.5V to 5V
operating-temperature	-20°C to 85°C
current-consumption	Microampere level
field-of-view	Approximately 130 degrees
applications	UV index monitoring, environmental sensing, wearable UV detection