Page 1/2
©2022 Senseair AB. All rights reserved.
An Asahi Kasei Group Company.
Document: PSH1945 Rev: 5
Standard specication
Measured gas Carbon dioxide (CO
2
)
Operating principle Non-dispersive infrared
(NDIR)
Measurement range CO
2
0.04 – 2%vol
Accuracy CO
2
±200 ppm ±3% of reading
1, 2
Maintenance No maintenance required
Life expectancy >15 years
Power supply 4.5 – 5.25 V DC
Operation temperature range 0 – 50 °C
Communication UART (Modbus)
Dimensions 33.9 x 19.8 x 8.7 mm
Power consumption 300 mA peak
30 mA average
Response time 2 minutes by 90%
Senseair S8 2%
A very small, versatile and
mass-producible CO
2
transmitter module
More than 30 years experience of research and
development within the eld of infrared gas sensing has
now brought us the smallest CO2 sensor, with NDIR-
technique, in the world – Senseair S8 2%. The new
sensor has excellent performance such as high accuracy
and low power consumption.
Senseair S8 2% is designed for high volume production
with full traceability by sensor serial number on all
manufacturing processes and key components. Every
sensor is individually calibrated and is provided with
UART digital interface. The sensor is maintenance-free
and has an estimated life time of more than 15 years.
Senseair S8 2% is a module that is designed for simple
integration into products. Senseair S8 2% can be used
in a wide range of applications such as in ventilation
control to improve energy savings and to assure a good
indoor climate. Other elds of use are personal safety
and measurements to increase process yield and to
increase economic value in bio-related processes.
Key benets
• Miniature size
• Individually calibrated
• Maintenance-free
• Long term stability
• Low power consumption
Note 1: In normal IAQ applications. Accuracy is dened after minimum three (3)
ABC periods of continuous operation with ABC on.
Note 2: Accuracy is specied over operating temperature range. Specication is referenced
to certied calibration mixtures. Uncertainty of calibration gas mixtures (±1%
currently) is to be added to the specied accuracy for absolute measurements.
Page 2/2
©2022 Senseair AB. All rights reserved.
An Asahi Kasei Group Company.
Document: PSH1945 Rev: 5
Senseair S8 2% Technical Specication
General Sensor Performance:
Required storage/operation environment Non-corrosive and non-condensing
Sensor lifetime expectancy >15 years
Service interval and maintenance Maintenance-free for normal indoor applications with Senseair
1
Self-diagnostics A full system test is executed automatically every time the power is turned ON
Operative environment required for keeping calibrated and specied accuracy in gas measurement:
Operative temperature range 0 – 50 °C
Operative relative humidity range 0 – 85% RH, non-condensing
1
Electrical Properties:
Power supply 4.5 – 5.25 V unprotected against surges and reverse connection
Power consumption 300 mA peak, 30 mA average
Mechanical Properties:
Electrical Connections DVCC, G+ and G0
Pin headers Optional
Dimensions 33.9 x 19.8 x 8.7 mm 004-0-0053 (Max. Length x Width x Height)
CO
2
Measurement:
Operating principle Non-dispersive infrared (NDIR)
Measurement Range 0.04 – 2%vol
2
Accuracy ±40 ppm ±3% of reading
3, 4
Measurement interval 4 seconds
Note 1: When using ABC (Automatic Baseline Correction) algorithm of Senseair.
Note 2: Sensor is designed to measure in the range 400 to 20000 ppm. Exposure to con
centrations below 400 ppm may result in incorrect operation of ABC algorithm
and shall be avoided for model with ABC on.
Note 3: In normal IAQ applications. Accuracy is dened after minimum three (3) ABC
periods of continuous operation with ABC on. Some industrial applications do
require maintenance. Please, contact Senseair for further information.
Note 4: Accuracy is specied over operating temperature range. Specication is refer
enced to certied calibration mixtures. Uncertainty of calibration gas mixtures
(±1% currently) is to be added to the specied accuracy for absolute measurements.