{"title":"Gravity: SGP40 Air Quality Sensor","handle":"gravity-sgp40-air-quality-sensor","url":"/products/gravity-sgp40-air-quality-sensor","description":"The Gravity SGP40 Air Quality Sensor uses Sensirion's SGP40 digital VOC sensor chip with built-in temperature and humidity compensation. It outputs a VOC index (0–500) that can be used directly to evaluate indoor air quality without calibration. The Gravity interface provides plug-and-play connectivity to DFRobot controllers and other I2C-compatible boards.\n\nWith ultra-low power consumption and a fast 2-second response time, this sensor is well suited for long-running indoor installations such as air purifiers, kitchen hoods, and ventilation control systems. C and Python libraries are available.\n\nKey Features\n\n\nSGP40 VOC Sensor – Sensirion CMOSens technology with micro-hotplate\n\nNo Calibration Required – Built-in temperature and humidity compensation\n\nVOC Index Output – 0–500 scale for direct air quality indication\n\nUltra-Low Power – 2.6 mA operating current\n\nFast Response – 2-second response time, 10-second preheat\n\nGravity Interface – I2C connection with standard Gravity cable\n\n\nIdeal For\n\nAir purifiers and kitchen hoods\nDemand-controlled ventilation\nThermostats and HVAC systems\nIndoor air quality monitoring\n\n\nSpecifications\n\n\nPower Supply – 3.3–5 V\n\nOperating Current – 2.6 mA\n\nPreheat Time – 10 s\n\nResponse Time – 2 s\n\nInterface – I2C (address 0x59)\n\nVOC Index Range – 0–500\n\nMeasuring Range – 0–1000 ppm (ethanol equivalent)\n\nOperating Temperature – -10°C to 50°C\n\nOperating Humidity – 0–90% RH\n\nDimensions – 20 × 22 mm\n\n\nPackage Contents\n\n1× Gravity SGP40 Air Quality Sensor\n1× Gravity 4-Pin I2C/UART Sensor Cable\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":3373,"title":"Default Title","sku":"DF-SEN0394","price":23.53,"on_sale":false,"in_stock":true,"available_quantity":128,"option1":"Default Title"}]}