{"title":"AS7331 UVA/UVB/UVC Sensor Breakout","handle":"adafruit-as7331-uv-uva-uvb-uvc-sensor-breakout","url":"/products/adafruit-as7331-uv-uva-uvb-uvc-sensor-breakout","description":"This compact board makes it easy to measure ultraviolet light across three separate bands, giving you independent UVA, UVB and UVC readings instead of a single combined value. That makes it a strong fit for human and agricultural UV monitoring, as well as UVC-focused applications such as germicidal, curing, and other specialised sensing tasks.The AS7331 is configurable over I2C, with multiple gain and conversion settings so you can tune it for different UV levels. Adafruit has also broken out the READY pin so you can tell when a conversion is complete, plus a SYNC input that can be used to synchronise readings with an external pulse.To keep integration simple, the sensor is mounted on a STEMMA QT form factor breakout with onboard level shifting and SparkFun Qwiic compatible STEMMA QT connectors. That means you can plug it straight into a 3.3V or 5V microcontroller without needing to solder, and Adafruit provides both Arduino and CircuitPython libraries with example sketches to help you get started. A QT cable is not included.Features:Three-band UV sensing: Reads and differentiates between UVA, UVB and UVC.Separate measurements: The three UV measurements are separated rather than mixed into one number.Configurable operation: Many gain and conversion settings are configurable over I2C.Address selection: The default I2C address can be changed using the two jumpers on the back.Multi-device support: You can have up to four sensors on the same bus.READY pin: Indicates when a sensor conversion is complete.SYNC input: Can be used to synchronise readings with an external pulse.STEMMA QT form factor: Mounted on a breakout board with SparkFun Qwiic compatible STEMMA QT connectors.Level shifting: Designed for use with 3.3V or 5V microcontrollers.Library support: Arduino and CircuitPython libraries are available.Examples included: Includes example sketches to help you get started.Specifications:UVA channel measurement: up to 349 mW/cm² at 1x gainUVB channel measurement: up to 386 mW/cm² at 1x gainUVC channel measurement: up to 169 mW/cm² at 1x gainResponsivity: as low as 2.38 nW/cm² per LSBInterface: I2CDefault I2C address: 0x74Address configuration: two jumpers on the backMaximum sensors per bus: up to fourLogic compatibility: 3.3V or 5V microcontrollersIt suits Arduino, Raspberry Pi, and many CircuitPython-compatible boards, especially if you are already using the STEMMA QT or Qwiic ecosystem. If you need a cable for the QT connectors, it is sold separately.","vendor":"Adafruit","product_type":"UV Sensor Breakout","in_stock":false,"options":[],"variants":[{"id":15519,"title":"Default Title","sku":"AF-6476","mpn":"ADA6476","price":53.71,"on_sale":false,"in_stock":false,"available_quantity":0}]}