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Grove - SEN55 All-in-one environmental sensor - NOx, VOC, RH, Temp, PM1.0/2.5/4/10 with superior accuracy and lifetime

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Grove-all in one enviromental sensor SEN55 is an integrated Grove ambient sensor, assembling 8 types of environmental signal output, sensing in high accuracy and operating for up to 10 years, born for HVAC and air quality long years detecting applications.  Powered by Sensirion, it represents leading technology in sensing.

In stock
  • 10+: $44.00



  • Comprehensive detection: Support NOx, PM, VOC, RH, and Temp all 5 ambient data signal continuously sensing
  • One driver for 8 data signals: Deliver 4 types of PM and 4 primary ambient signals through the IIC function
  • One wire for all data output: Represent Grove family simplified connection for only one Grove cable required between the sensor and the processor
  • Superior sensing accuracy: Calibrate full digital signals to output powered by Sensirion
  • Superior operating lifetime: Maintain fine performance for up to 10 years
  • Selectable modes for deploying with the edge: Provide Idle, RHT/Gas-Only, Measurement Mode for various low-cost applied edge


Grove-all in one environmental sensor SEN55 is an integrated, superior Grove IIC ambient sensor, assembling PM, NOx, VOC, RH, Temperature sensing functionality, delivering up to 8 types of environmental data signal, sensing in high accuracy and operating for long terms, born for HVAC(Heating, Ventilation and Air Conditioning) and air quality long years detecting applications. Powered by Sensirion, it represents fine sensing performance, and there will be only one Grove cable needed between the sensor and the single board, such as Wio terminal, Seeeduino, Arduino expansion board, Raspberry Pi expansion board, and XIAO expansion board, as simplifying the edge in the wild.

The sensor is equipped with sensing components that can change the magnitude of the current corresponding to a specific gas to measure VOC(Volatile Organic Compounds) and NOx(Nitric oxide), where applies the same principle to sense Temp(Temperature), RH(Relative Humidity). There is a laser generator and a filter on the sensor as it utilizes the laser scattering method to calculate the particle size of the gas passing the sensor for precise PM1.0, PM2.5, PM4, and PM10 detection. It will continuously output 8 signals above and the sampling interval will be just 1 second.

Based on the complex mathematical algorithm and model, the sensor has been designed to output calibrated digital signals to ensure superior sensing accuracy. Meanwhile, the sensing components on it possess high robustness which makes it cable of operating 24/7 for up to 10 years. There are three operating modes available for the user, which is helpful for edge deploying. It costs only 6.8 mA under RHT/Gas-Only Measurement Mode and 2.6 mA for Idle Mode while the full function of Measurement mode can be programmed to set on or off through the IIC function.

Imagine you are in a poor air quality environment without knowing it, or you want a device that can detect harmful gases in real-time, that this device can be easily deployed and used, for a way long time applying. Then this Grove-all in one environmental sensor will be the amazed Grove for you.

What is Grove?

We have developed more than 400 Grove modules, covering a wide range of applications that can fulfil various needs. Click to explore the Grove Sensor family and get started to Grove your Idea. For all Grove users (especially beginners), we provide you with guidance PDF documents. Please download and read through Preface - Getting Started and Introduction to Grove before your use of the product.


  • Heating Ventilation and Air Conditioning
  • Air Quality Detection
  • Respiratory Healthcare
  • Harmful Gas Alarm
  • Particulate Matter Alert
  • Fire Alarm
  • Chemical Experiment
  • Smart Farm

One More Thing

With the SenseCAP S2110 controller and S2100 data logger, you can easily turn the Grove into a LoRaWAN® sensor. Seeed not only helps you with prototyping but also offers you the possibility to expand your project with the SenseCAP series of robust industrial sensors.

The IP66 housing, Bluetooth configuration, compatibility with the global LoRaWAN® network, built-in 19 Ah battery, and powerful support from APP make the SenseCAP S210x the best choice for industrial applications. The series includes sensors for soil moisture, air temperature and humidity, light intensity, CO2, EC, and an 8-in-1 weather station. Try the latest SenseCAP S210x for your next successful industrial project.


Sensor Module Specifications

Parameter Conditions Value Units
Sampling interval - 1±0.03 s
Lifetime 24 h/day operation > 10 years
Acoustic emission level 0.2m 24 dB(A)
Long term acoustic emission level drift 0.2m +0.5 dB(A) / year

Particulate Matter Specifications

Parameter Conditions Value Units
Mass concentration specified range 0 to 1'000 μg/m3
Mass concentration size range PM1.0 0.3 to 1.0 μg
PM2.5 0.3 to 2.5 μg
PM4 0.3 to 4.0 μg
PM10 0.3 to 10.0 μg

Temperature and Humidity Specifications

Parameter Conditions Value Units
Compensated outputs - Temperature and Relative Humidity °C
Typical accuracy temperature @ 15-30 °C, 50 %RH

± 0.45

Max. accuracy temperature @ 15-30 °C, 50 %RH ± 0.7 °C
Repeatability temperature @ 25 °C, 50 %RH, τ 63% < 60 s

Gas Specifications

Parameter Comments Values Units
Min Typ Max
Output signals VOC Index 1 - 500 VOC Index points
NOx Index 1 - 500 NOx Index points
Device-to-device variation VOC Index <±15 VOC Index points
NOx Index <±25 NOx Index points
Repeatability VOC Index <±5 VOC Index points
NOx Index <±10 NOx Index points

For further and more specific measured information, please refer to here.

Part List

Grove - all in one environmental sensor SEN55 x1
Grove cable x1


HSCODE 9031809090
RoHS 1




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  1. Product Quality
    from order view
    Still haven't connected and tried the sensor, but build quality is very good. Well protected package and fast delivery.


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