The SGP30 Gas Sensor Module is a high-precision, indoor air quality detection sensor based on Sensirion's multi-pixel MOX (metal-oxide) technology. By integrating four distinct gas-sensing elements on a single chip, it measures Total Volatile Organic Compounds (TVOC) and calculates Equivalent Carbon Dioxide (eCO2) levels. It features built-in baseline compensation and fully calibrated digital output via I2C, making it ideal for smart home automation, air purifiers, and environmental IoT monitoring.

Specifications

• Sensor Chip: Sensirion SGP30
• Working Power Voltage: 2V to 5V DC (Module breakout includes onboard voltage regulation)
• Interface: I2C digital interface
• I2C Address: 0x58 (Fixed)
• TVOC Measurement Range: 0 to 60,000 ppb (parts per billion)
• eCO2 Measurement Range: 400 to 60,000 ppm (parts per million)
• Sampling Rate: 1 Hz (1 reading per second recommended)
• Response Time: < 1>
• Operating Temperature Range: -40°C to +85°C
• Operating Humidity Range: 0% to 90% RH (Non-condensing)

Interface and Pinout Guide

• VCC: 2V to 5V Power Input
• GND: Common Ground Reference
• SCL: I2C Serial Clock Line (Connects to MCU SCL pin)
• SDA: I2C Serial Data Line (Connects to MCU SDA pin)

Key Features

• Multi-Pixel Metal-Oxide Sensing: Combines four gas sensing elements onto a single micro-chip to detect multiple volatile organic compounds simultaneously.
• On-Chip Calibrated Signal Output: Delivers fully processed TVOC and eCO2 values directly over I2C, avoiding the need for complex analog sampling equations.
• Long-Term Stability: Incorporates Sensirion's proprietary baseline compensation algorithms to resist sensor drift and degradation over time.
• Compact & Low Power: Ultra-small form factor with low power consumption, making it suitable for battery-operated handheld air testers and smart home appliances.

Common Applications

• Smart HVAC & Air Purifiers: Automatically triggering ventilation fans or air filtration units when indoor VOC levels rise.
• Indoor Air Quality (IAQ) Monitors: Building desktop air quality stations for homes, classrooms, and office spaces.
• IoT Weather Stations: Adding indoor environmental telemetry to smart home gateways and logging nodes.
• Formaldehyde & Solvent Leak Detection: Spotting volatile chemical off-gassing from paints, furniture, and cleaning agents.

Usage Tips

• Sensor Burn-In & Warm-Up: Upon first boot, the metal-oxide heating element requires a 15-second warm-up period before returning valid measurements. For maximum accuracy, allow a burn-in period of 12 to 24 hours on initial installation.
• Baseline Persistence: To maintain high accuracy, the SGP30 recalculates its baseline calibration continuously. Save the baseline values to your microcontroller's non-volatile memory (EEPROM/Flash) every hour, and restore them upon power-up.
• eCO2 vs True NDIR CO2: The sensor calculates eCO2 (equivalent CO2) based on H2 gas emissions and VOC concentrations. While highly accurate for general indoor human occupancy monitoring, use a non-dispersive infrared (NDIR) sensor (like the MH-Z19 or SCD30) if your application requires direct physical carbon dioxide measurement.