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Small rectangular sensor board with a metal shield and a single Grove connector

Seeed Studio

Seeed Studio Grove SEN55 All-in-one Environmental Sensor

SKU CH-1S7R-A243A

All-in-one environmental sensor measuring PM1.0, PM2.5, PM4, PM10, NOx, VOC, humidity and temperature for HVAC and air purifier integration

  • TypeSensors
  • All-in-one sensor delivers eight environmental data types
  • Proprietary algorithms simplify HVAC and air purifier integration
  • STAR engine accelerates temperature response for better accuracy
  • Low power draw of 6.8 mA in measurement mode
  • Fully calibrated digital outputs rated for 10-year lifetime

Grove SEN55 All-in-One Sensor

The Grove SEN55 combines particulate matter, NOx, VOC, humidity and temperature sensing in a single module. It delivers up to eight environmental data types through a Grove IIC interface. The sensor is built for HVAC and air purifier projects that need long-term, calibrated readings. Makers and engineers can connect it to boards such as Wio Terminal, Seeeduino, Arduino, Raspberry Pi or XIAO expansions with one cable.

Sustained Operation Characteristics

Proprietary STAR engine algorithms accelerate response to ambient temperature changes, improving accuracy and stability during continuous monitoring. Power draw sits at 6.8 mA in RHT and gas measurement mode and drops to 2.6 mA in idle mode. The laser scattering method provides ongoing PM1.0, PM2.5, PM4 and PM10 detection. Fully calibrated digital outputs and high robustness support reliable performance for up to 10 years.

Pre-Order Setup Checks

Verify that your target board exposes a Grove IIC connector or that you have a compatible adapter for the single cable connection. Confirm your firmware can parse the multi-parameter data stream including PM, NOx, VOC, RH and temperature values. Ensure the application environment matches the sensor's design focus on HVAC and air quality monitoring. Buyers needing wireless connectivity or additional gas species not listed should consider other solutions.

Highlights

  • All-in-one sensor delivers eight environmental data types
  • Proprietary algorithms simplify HVAC and air purifier integration
  • STAR engine accelerates temperature response for better accuracy
  • Low power draw of 6.8 mA in measurement mode
  • Fully calibrated digital outputs rated for 10-year lifetime

Specifications

TypeSensors

Questions about this item

How much current does the SEN55 draw when running all day in measurement mode?

It draws 6.8 mA in RHT/Gas-Only Measurement Mode and 2.6 mA in Idle Mode, so continuous operation keeps power demand very low.

Which boards and connectors must I already have to plug the SEN55 in?

You need a single-board computer or microcontroller with a Grove IIC port — such as a Wio Terminal, Seeeduino, Arduino expansion board, Raspberry Pi expansion board, or XIAO expansion board — plus one Grove cable.

Will the SEN55 share a Grove IIC bus with older sensors I already use?

Yes, it uses a standard Grove IIC digital interface, so it can sit on the same bus as other IIC devices without extra wiring.

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