The UV sensor is able to measure the total ultraviolet intensity of sunlight. You can use it to sense ozone and pollutants or make fire safety devices.
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Specifications
Connections: RJ11 4P4C
Power: 3.3V
Connections type: Analog output
You can find the introduction of this product following this link
https://wiki.elecfreaks.com/en/microbit/sensor/planet-x-sensors/Plant_X_EF05021