The SVM30-J is an all-in-one environmental sensing combo module engineered by Sensirion to streamline air quality monitoring product development. It integrates two proven sensors onto a single PCB: the SGP30 multi-pixel gas sensor for volatile organic compounds and carbon dioxide equivalents, and the SHTC1 relative humidity and temperature sensor. Featuring fully integrated humidity compensation and automatic baseline management, the SVM30-J delivers pre-calibrated air quality metrics over a simple I2C interface.

Specifications

• Integrated Chips: Sensirion SGP30 (Gas Sensor) & Sensirion SHTC1 (Humidity & Temperature Sensor)
• Supply Voltage: 5V DC
• Measured Parameters:
  • TVOC (Total Volatile Organic Compounds): 0 to 60,000 ppb
  • CO2eq (CO2-Equivalent): 400 to 60,000 ppm
  • Relative Humidity (RH): 0% to 100% RH
  • Temperature (T): -20°C to +85°C
• Interface: Digital I2C Interface
• Features: Onboard automatic baseline compensation and real-time gas signal humidity compensation
• Calibration: Fully factory-tested and pre-calibrated
• Long-Term Stability: High resistance to siloxanes and environmental sensor drift

Interface and Pinout Guide

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

Key Features

• Combo Sensor Integration: Combines gas, relative humidity, and ambient temperature sensing into a single compact board, drastically cutting hardware footprint and circuit layout time.
• On-Board Signal Processing: Uses real-time relative humidity data directly from the onboard SHTC1 sensor to compensate the SGP30 MOX gas readings, ensuring high TVOC and eCO2 accuracy in fluctuating environments.
• Automatic Baseline Compensation: Features Sensirion’s advanced internal baseline algorithm to maintain long-term signal stability without requiring frequent manual recalibrations.
• Plug-and-Play I2C Communication: Outputs fully processed physical metrics directly over I2C, eliminating the need for complex analog sampling equations or custom temperature compensation math on the host processor.

Common Applications

• Smart Air Purifiers & HVAC Controls: Driving automated fan speeds and air filtration units based on real-time room VOC and humidity metrics.
• Indoor Air Quality (IAQ) Monitors: Building desktop environmental monitoring terminals for classrooms, healthcare centres, homes, and offices.
• Smart Home & IoT Environmental Nodes: Integrating comprehensive indoor atmospheric data into smart home automation hubs and cloud logging systems.
• Ventilation Systems: Monitoring CO2-equivalent levels in conference rooms to trigger fresh air intake dampers.

Usage Tips

• Initial Warm-Up Period: Upon powering on the module, the gas sensor requires a brief warm-up phase (typically 15 seconds) before returning valid TVOC and eCO2 readings.
• Baseline Memory Storage: To maintain high accuracy across power cycles, read the baseline calibration parameters from the module every hour and store them in non-volatile memory (EEPROM/Flash), then restore them during the boot sequence.
• Airflow Placement: Mount the module in an enclosure with adequate passive ventilation so that ambient air flows freely over the sensing elements. Avoid placing it directly next to high-heat components (such as linear regulators or power transistors) to prevent false temperature and humidity offsets.