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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.<br />
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== Summary ==<br />
The Waveshare UV sensor is based on the SGM8521 chip and provides an analog output voltage that rises with increasing ultraviolet intensity. The board includes an amplifier circuit with an adjustable gain factor.<br />
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== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/9537 9537 – UV Sensor]<br />
* [https://shop.jw-tech.eu/p/WSAL9537 WSAL9537 – UV Sensor]<br />
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== Technical overview ==<br />
* Chip: SGM8521<br />
* Supply voltage: 3.3 V to 5 V<br />
* Output type: analog output<br />
* Spectral response: 200 nm to 370 nm<br />
* Dimensions: 22.0 mm × 16.0 mm<br />
* Mounting hole size: 2.0 mm<br />
* Available distance: 0.8 m (typ.), 1.5 m (max.)<br />
* Applications: UV tester, outdoor UV detector, germicidal lamp<br />
* Pinout for MCU connection: VCC ↔ 3.3–5.0 V; GND ↔ ground; AOUT ↔ MCU analog input<br />
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== Notes and version constraints ==<br />
* The source does not provide explicit command lines or scripts specific to the UV sensor itself; the code examples mentioned in the wiki refer to Pico/Arduino environments and are not confirmed as exact commands for this sensor.<br />
* Exact threshold values, calibration details, or driver specifics for the SGM8521 are not given in the provided source.<br />
* The stated “available distance” (0.8 m typ., 1.5 m max.) is context-dependent and should be verified before design-in.<br />
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== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/UV_Sensor UV Sensor - Waveshare Wiki]<br />
* Source revision: 69202<br />
* Captured: 2026-08-29T09:49:43+00:00<br />
* SHA-256: <code>65f340af888dbe08d0bcb3d2bda727341e7216a24e336f5dd4c73de7707d6f31</code></div>JWTechPublisher