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Small green PCB with four silver sensor modules and a white Grove connector

Seeed Studio

Seeed Studio Grove Multichannel Gas Sensor v2

SKU CH-MHVH-5V7AZ

Four independent MEMS sensors detect CO, NO₂, ethanol and VOCs simultaneously via Grove I²C for qualitative air-quality monitoring

  • TypeSensors
  • Four independent MEMS units deliver simultaneous multi-gas data
  • Detects CO, NO₂, ethanol and VOCs in one module
  • Qualitative sensing suits air-quality alerts and leak alarms
  • Grove I²C interface at address 0x55 simplifies MCU integration
  • Compact 3.3–5 V design fits indoor, vehicle and breath-test deployments

Multichannel Gas Sensor v2

The Grove Multichannel Gas Sensor v2 is a compact module that packs four independent MEMS sensing elements onto a single board. It targets makers, students and engineers who need to detect several gases at once in indoor air-quality, safety or experimental projects.

Grove I2C interface limits

The sensor communicates over a Grove I2C bus at address 0x55 and operates from 3.3 V to 5 V. Qualitative detection is the design goal; the device indicates the presence and relative change of gases such as CO, NO2, ethanol and VOCs rather than delivering calibrated concentration values.

Preheat and compatibility checks

Before first use the module requires a warm-up period to reach internal chemical equilibrium, with longer storage demanding longer preheat time. Verify that your host controller supports 3.3 V or 5 V I2C logic and that your software can handle qualitative multi-channel readings from the four onboard GM-series sensors.

Highlights

  • Four independent MEMS units deliver simultaneous multi-gas data
  • Detects CO, NO₂, ethanol and VOCs in one module
  • Qualitative sensing suits air-quality alerts and leak alarms
  • Grove I²C interface at address 0x55 simplifies MCU integration
  • Compact 3.3–5 V design fits indoor, vehicle and breath-test deployments

Specifications

TypeSensors

Questions about this item

Which gases does the four-channel sensor array detect?

The module uses four independent MEMS sensors (GM-102B, GM-302B, GM-502B, GM-702B) to detect carbon monoxide, nitrogen dioxide, ethanol and volatile organic compounds simultaneously.

What does qualitative detection mean for this sensor?

The sensor identifies the presence and relative changes of target gases rather than providing precise concentration values in parts per million.

How does the Grove I2C interface at address 0x55 work with my controller?

The onboard STM32F030 MCU communicates over standard I2C at 3.3 V or 5 V logic, allowing direct connection to Arduino, Raspberry Pi or other Grove-compatible hosts.

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