|
Parameter
|
Sensor Model
|
Range
|
Accuracy
|
Measurement Interval
|
|
CO2
(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)
PM1
PM2.5
|
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
|
|
PM4
PM10
|
±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:
<±15 NOx Index points or % m.v. (the larger)
|
|
CH2O
(HCHO, Formaldehyde)
|
Sensirion SFA30
|
0 to 1 ppm
|
±0.02 ppm or ±20% of the measured value, whichever is larger.
|
1 minute
|
|
Temperature
|
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
|
±2dB
|
1 minute
|
*Using Sensirion conversion algorithm
Certifications
RESET
Atmocube is a RESET Grade B accredited air quality monitor. More information can be found here: https://reset.build/directory/monitors/RM-035
MCERTS
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: https://www.csagroup.org/wp-content/uploads/2020/01/MC-20035001.pdf
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.
