Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | GUVA-S12SD |
| Detection Range | 240nm - 370nm |
| Operating Voltage | 3.0V - 5.0V DC |
| Output Type | Analog Voltage |
| Peak Sensitivity | 365nm |
| Response Time | < 1 second |
| Operating Temperature | -20°C to +85°C |
| Board Dimensions | 25mm x 15mm |
| Interface | 3-Pin Header (VCC, GND, OUT) |
| Application | UV Index Monitoring, Sunlight Detection |
Anonymous
Mar 20, 2026
Rating: 5/5
Ideal for plant monitoring
Using this to monitor UV exposure for my greenhouse automation system. It triggers my shade cloths automatically when intensity gets too high. Highly recommended.
Anonymous
Mar 17, 2026
Rating: 4/5
Good sensitivity, needs calibration
The module is very sensitive to UV changes. However, you will need to calibrate the voltage readings against a known source if you need precise scientific data. For hobbyist use, it is excellent.
Anonymous
Mar 16, 2026
Rating: 5/5
Compact and Easy to Use
Small form factor makes it easy to fit into weather station enclosures. Wiring was straightforward, and I got readings immediately upon powering up.
Anonymous
Mar 10, 2026
Rating: 4/5
Great value for money
For the price, you cannot beat this sensor. It helped me complete my final year project on environmental monitoring. Just ensure your ADC resolution is high enough.
Anonymous
Mar 03, 2026
Rating: 5/5
Perfect for Arduino Projects
This sensor works flawlessly with my Arduino Uno. The analog output is stable and correlates well with actual sunlight intensity. Great for building a simple UV index monitor.
Anonymous
Mar 03, 2026
Rating: 5/5
Reliable performance outdoors
I have had this running outside in a protective case for two months. It handles temperature variations well and continues to provide consistent data throughout the day.
Q: Does the board come with a protective coating?
A: The PCB has a basic conformal coating, but for long-term outdoor use, we recommend placing the sensor inside a waterproof enclosure with a UV-transparent window.
Q: Can this sensor detect UVC light from germicidal lamps?
A: While the sensor has a range of 240nm-370nm, it is primarily optimized for UVA and UVB (sunlight). Detection of specific UVC sources may vary and requires careful calibration.
Q: Is there a library available for ESP32?
A: Since this is an analog sensor, no specific driver library is needed. You simply use the standard analogRead() function available in the ESP32 Arduino core.
Q: Does this module output digital or analog signals?
A: The GUVA-S12SD module outputs an analog voltage signal proportional to the UV intensity detected. You will need an ADC (Analog-to-Digital Converter) to read the value with a microcontroller.
Q: What is the power consumption of this module?
A: The module operates on low power, typically drawing less than 0.5mA during active sensing, making it suitable for battery-powered applications.
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