Waveshare SGP40 VOC Volatile Organic Compounds Gas Sensor, I2C Bus Features The SGP40 VOC Sensor is a digital VOC (Volatile Organic Compounds) sensor module which incorporates SGP40, designed for air quality monitoring. It can be used to measure fire coal, natural gas emissions, cigarettecooking smoke, and emissions from constructing activity, decoration material, furnitures, home appliances, then generate digital signals for triggering air treatment devices. The SGP40 VOC Sensor is small in size for easy integration into air treatment devices and air quality monitors, definitely an ideal choice for learning air quality monitoring. 1. Incorporates SGP40, for measuring 0 ~ 1000 ppm of ethanol equivalents 2. Features humidity-compensation and low-heat-dissipation, providing outstanding performance on sorts of environments 3. Digital I2C output, less interference 4. Onboard voltage translator, compatible with 3.3V5V operating voltage 5. Comes with development resources and manual (examples for Raspberry PiArduinoSTM32) Specification 1. Sensor: SGP40 2. Measurement range: 0~1000 ppm of ethanol equivalents 3. Communication BUS: I2C (constant address: 0x59) 4. Operating voltage: 3.3V 5V 5. Response time: Less than 10s (tau 63 %) 6. Switch-ON time: Less than 60s 7. Size: 27x20mm 8. Mounting hole size: 2.0mm Package List 1. SGP40 VOC Sensor x1 2. PH2.0 4PIN wire 20cm x1