GUVA-S12SD UV Light Sensor Module Sunlight UV Intensity Detection High Sensitivity 240-370nm Analog Output

GUVA-S12SD UV Light Sensor Module Product Overview

The GUVA-S12SD UV Light Sensor Module is a high-sensitivity ultraviolet detection module based on the GUVA-S12SD UV photodiode, capable of accurately detecting UV intensity in the 240nm to 370nm wavelength range (covering UVB and most of the UVA spectrum). The module features a Schottky-type photodiode operating in photovoltaic mode, outputting an analog voltage signal proportional to UV intensity. It supports a wide 2.5V to 5V power supply with microampere-level operating current, ensuring ultra-low power consumption. With fast response, a 130-degree wide detection angle, and compact dimensions of only 11mm × 27mm, it is widely used in UV index monitoring, smart wearables, UV germicidal lamp detection, flame detection, and outdoor environmental monitoring.

GUVA-S12SD UV Light Sensor Module Key Features

High-Sensitivity UV Photodiode: Features the GUVA-S12SD UV photodiode (SMD3528 package), based on Gallium Nitride (GaN) material and Schottky structure, offering extremely high sensitivity to UV light without the need for wavelength filters.

Broad Spectral Detection Range: Detection wavelength range of 240nm to 370nm, covering UVB (280-315nm) and most UVA (315-400nm) bands.

Analog Voltage Output: Outputs an analog voltage signal proportional to UV intensity, with the output voltage relationship: Vo = 4.3 × Diode-Current-in-uA. Directly connect to the ADC pin of Arduino and other microcontrollers.

Wide Operating Voltage & Low Power: Supports 2.5V to 5V wide voltage input, with microampere-level operating current, ideal for battery-powered portable devices.

Wide Detection Angle & Fast Response: Detection angle up to 130 degrees, with response time of less than 1 second.

High Stability & Linear Output: Output signal features excellent linearity and high stability, making it easy to calibrate UV intensity and convert to UV INDEX.

Compact and Lightweight: Module dimensions of only 11mm × 27mm (Adafruit version: 10mm × 19mm), weighing only 0.7g to 1.2g, easy to integrate into various portable devices.

GUVA-S12SD UV Light Sensor Module Applications

The GUVA-S12SD UV Light Sensor Module is widely used in UV Index (UVI) Monitoring: Create portable UV index meters to monitor outdoor UV intensity in real-time for sun protection guidance. Smart Wearables: Integrate into smart watches, bracelets, and other devices to provide UV exposure alerts. UV Germicidal Lamp Detection: Monitor UV output intensity of germicidal lamps to ensure sterilization effectiveness. Flame Detection: Detect UV radiation in flames for fire warning systems. Plant Growth Environmental Monitoring: Monitor UV levels in greenhouses or indoor growing environments. Outdoor Environmental Monitoring Stations: Serve as the core UV sensor for weather stations and environmental monitoring equipment. Maker Education & DIY Projects: Ideal for sensor education and creative projects on Arduino, Raspberry Pi, and other platforms.

GUVA-S12SD UV Light Sensor Module Key Advantages

High-Sensitivity UV Detection, No Filter Required: The GUVA-S12SD features a GaN-based Schottky photodiode with high sensitivity to 240-370nm UV light, eliminating the need for external wavelength filters and simplifying circuit design. Analog Voltage Output, Plug-and-Play: Outputs an analog voltage signal proportional to UV intensity, directly connectable to ADC pins of Arduino and other microcontrollers without complex I2C setup – ideal for rapid prototyping. Wide Voltage Supply & Ultra-Low Power: Supports 2.5V to 5V wide voltage input with microampere-level current, ideal for battery-powered portable and wearable devices. Wide Detection Angle for Easy Use: 130-degree wide detection angle eliminates the need for precise alignment with the light source, making it more convenient to use. Linear Output for Easy UV INDEX Conversion: Output voltage is linearly proportional to UV intensity, easily convertible to UV Index (UVI) – 0.1V output corresponds to approximately UV INDEX 1. Compact and Lightweight for Easy Integration: Module dimensions of only 11mm × 27mm, weight of only 0.7g, ultra-small footprint ideal for portable and wearable products. High Reliability and Stability: SMD3528 package with surface-mount technology ensures excellent temperature stability and long-term reliability. Rich Open-Source Ecosystem Support: Extensive tutorials, code examples, and project cases available online for GUVA-S12SD, with ready-to-use driver libraries and sample code for Arduino and Raspberry Pi.

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FAQ

1. What is the GUVA-S12SD UV Sensor?

It is an analog sensor module based on the GUVA-S12SD UV photodiode. It detects UV light in the 240nm to 370nm range (covering UVB and most of UVA) and outputs an analog voltage proportional to the UV intensity.

2. What are the key specifications?

Operating Voltage: 2.5V ~ 5.5V (DC)

Detection Wavelength: 240nm ~ 370nm

Output Signal: Analog Voltage (0V ~ 1V corresponds to 0-10 UV Index)

Response Time: < 1 second

Viewing Angle: 130 degrees

Operating Current: Microamp level (Typical < 1mA)

Operating Temperature: -20℃ ~ +85℃

3. What package does the module use?

The GUVA-S12SD chip itself comes in an SMD package. Module sizes vary by manufacturer, e.g., 15×30mm, 30×22mm, or 10×19mm.

4. What applications is it suitable for?

It is widely used in UV index monitoring, smart wearable devices, ambient light detection, sterilization lamp monitoring, flame detection, and plant growing environment monitoring.

5. What development tools support it?

The module outputs an analog signal and can be directly connected to the ADC (Analog-to-Digital Converter) pins of development boards like Arduino, STM32, or ESP32.

6. What is the operating temperature range?

The operating temperature range is -20℃ to +85℃.

7. How does the module work?

The GUVA-S12SD photodiode converts UV light into a nanoamp (nA) level current. An onboard operational amplifier (Op-Amp) amplifies this current and converts it into an analog voltage of 0V ~ 1V. This voltage is proportional to UV intensity: Vout = 4.3 × Diode Current (µA).

8. How do I interpret the output voltage?

The output voltage (0V ~ 1V) directly corresponds to the UV Index (UVI). The conversion is: UV Index ≈ Output Voltage × 10. For example, 0.5V output corresponds to a UV Index of approximately 5.