Know your Atmocube

Sensor Accuracy and Technical Specifications


Sensor Model



Measurement Interval

(Carbon Dioxide) 

Sensirion SCD41

0 to 5000 ppm

± 75 ppm @ 400-1000 ppm

± 40 ppm + 5% m.v. @ 1’001 ppm – 2’000 ppm

1 minute

(Particulate Matter)



Sensirion SPS30

Sensor Specification Statement

0 to 1000 μg/m3

±[5 μg/m³ + 5 % m.v.] at 0 to 100 μg/m³

±10 % m.v. at 100 to 1000 μg/m³

PM2.5 accuracy verified by MCERTS at 0-75 μg/m3 ≤ 5 μg/m³

1 minute



±25 μg/m³ at 0 to 100 μg/m³


±25 % m.v. at 100 to 1000 μg/m³

TVOC Index
(Total Volatile Organic Compounds Index) 

Green Building Standard Compliance

Sensirion SGP41


Output Signal Range: 1 to 500 VOC Index Points

Device-to-Device Variation: 

<±15 VOC Index points or % m.v. (the larger)

1 minute

TVOC (ppm)*

Output Signal Range: 0 to 3 ppm*

15% of the measured value 

NOx Index
(Total for nitric oxide (NO) and nitrogen dioxide (NO2))

Output Signal Range: 1 to 500 NOx Index Points

Device-to-Device Variation: 

<±50 NOx Index points or % m.v. (the larger)

(HCHO, Formaldehyde)

Sensirion SFA30

0 to 1 ppm

±0.02 ppm or ±20% of the measured value, whichever is larger.

1 minute


Sensirion STS35-DIS

-40 to +125C

± 0.1 C

1 minute

Relative Humidity

Sensirion SHTC3

0 to 100 %RH

± 2 %RH

1 minute

Atmospheric Pressure

Infinion DPS310

300 to 1200 hPa

± 1 hPa

1 minute

Light Intensity

AMS TCS34725

0 - 60000 lux  ±10% 

1 minute

Background Noise Level

Knowles SPH0641LM4H-1


30 - 100 dB



1 minute

*Using Sensirion conversion algorithm



Atmocube is a RESET Grade B accredited air quality monitor. More information can be found here:


The Sensirion SPS30 PM2.5 sensor utilized in Atmocube passed the MCERTS certification (MCERTS Performance Standards for Indicative Ambient Particulate Monitors). 

More information and examples of the certificate can be found at: MCerts Certified Products

MCERTS report:

Other Lab Reports

Sondar Lab report on PM2.5 and PM10.

LMEG Lab report on CO2 and TVOC sensors.

Sensor accuracy compliance with Green Building Standards

TVOC Sensor Compliance with Green Building Standards

More details can be found via this link.

WELL v.2

CH2O - according to the WELL Performance Verification Guidebook, page 36.

PM 2.5, TVOC (ppm), CO2 - according to RESET Grade B certification cross compliance.

California Building Standards Code “Title 24”

CO2 sensor error must be certified as no greater than 75 ppm for a period of five years after sensor installation (CA Codes  repository).

RESET Building Certification

PM 2.5, TVOC (ppm), CO2 - according to RESET Grade B certification.