SparkFun Mini Spectral UV Sensor - AS7331 (Qwiic)
The SparkFun Mini Spectral UV Sensor features the AS7331 from ams OSRAM, measuring ultraviolet radiation across three dedicated channels: UVA (320–400 nm), UVB (280–320 nm), and UVC (200–280 nm). Each channel has its own photodiode with built-in interference filter for high sensitivity and accuracy.
This Qwiic Mini breakout (1 × 0.5 in.) communicates over I²C and includes two Qwiic connectors for solderless daisy-chaining, plus a 0.1"-spaced through-hole header with Interrupt and Sync pins. An Arduino library is available for quick setup via the Library Manager — search for "SparkFun AS7331".
Key Features
- Three UV Channels – UVA, UVB, and UVC with dedicated photodiodes and interference filters
- Four Operating Modes – Single Measurement (CMD), Continuous (CONT), Synchronized Start (SYNS), and Synchronized Start/End (SYND)
- High Dynamic Range – Up to 3.43×10¹⁰ (resolution × gain range)
- Ultra-Low Power – 1.42 mA active, 970 µA standby, 1 µA power-down with automatic power-down between measurements
- Qwiic I²C Interface – 2× Qwiic connectors for solderless assembly, plus through-hole header
- Four I²C Addresses – 0x74 (default), 0x75, 0x76, 0x77 via A0/A1 solder jumpers
- Compact Form Factor – Qwiic Mini footprint at just 1 × 0.5 in.
Specifications
- Sensor – ams OSRAM AS7331
- Operating Voltage – 2.7 V to 3.6 V
- Current (Active) – 1.42 mA typical
- Current (Standby) – 970 µA
- Current (Power Down) – 1 µA
- Interface – I²C (Qwiic compatible)
- Board Size – 1 × 0.5 in.
Ideal For
- UV index monitoring and environmental sensing
- UV sterilisation effectiveness measurement (UVC)
- Wearable sun exposure tracking
- Scientific and industrial UV analysis
Resources
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The SparkFun Mini Spectral UV Sensor features the AS7331 from ams OSRAM, measuring ultraviolet radiation across three dedicated channels: UVA (320–400 nm), UVB (280–320 nm), and UVC (200–280 nm). Each channel has its own photodiode with built-in interference filter for high sensitivity and accuracy.
This Qwiic Mini breakout (1 × 0.5 in.) communicates over I²C and includes two Qwiic connectors for solderless daisy-chaining, plus a 0.1"-spaced through-hole header with Interrupt and Sync pins. An Arduino library is available for quick setup via the Library Manager — search for "SparkFun AS7331".
Key Features
- Three UV Channels – UVA, UVB, and UVC with dedicated photodiodes and interference filters
- Four Operating Modes – Single Measurement (CMD), Continuous (CONT), Synchronized Start (SYNS), and Synchronized Start/End (SYND)
- High Dynamic Range – Up to 3.43×10¹⁰ (resolution × gain range)
- Ultra-Low Power – 1.42 mA active, 970 µA standby, 1 µA power-down with automatic power-down between measurements
- Qwiic I²C Interface – 2× Qwiic connectors for solderless assembly, plus through-hole header
- Four I²C Addresses – 0x74 (default), 0x75, 0x76, 0x77 via A0/A1 solder jumpers
- Compact Form Factor – Qwiic Mini footprint at just 1 × 0.5 in.
Specifications
- Sensor – ams OSRAM AS7331
- Operating Voltage – 2.7 V to 3.6 V
- Current (Active) – 1.42 mA typical
- Current (Standby) – 970 µA
- Current (Power Down) – 1 µA
- Interface – I²C (Qwiic compatible)
- Board Size – 1 × 0.5 in.
Ideal For
- UV index monitoring and environmental sensing
- UV sterilisation effectiveness measurement (UVC)
- Wearable sun exposure tracking
- Scientific and industrial UV analysis
