Miniature Infrared CO2 Sensor Module - S8 Residential

▪ Measurement range: 400 to 2000 ppm. Up to 10000ppm extended range
▪ Accuracy: ±70 ppm±3% of reading
▪ Operating temperature: 0 to 50°C
▪ Operating humidity: 0 to 85% RH non condensed
▪ Miniature size
▪ Individually calibrated
▪ Maintenance-free
▪ Long term stability
▪ Low power consumption

  • Model Number: S8 Residential
  • Data Sheet: Date Sheet File
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  • Miniature Infrared CO2 Sensor Module
  • Miniature Infrared CO2 Sensor Module
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Product Specification

S8 Residential Miniature Infrared CO2 Sensor Module Description
S8 is a miniature safety switch that can be used in control and alarm applications. The sensor can be integrated in a wide range of different alarm applications where you want to detect CO2, such as leakage detection.

S8 Residential Miniature Infrared CO2 Sensor Module Technical specification


S8 Residential  Article no. 004-0-0013

Target gas


Operating Principle

Non-dispersive infrared (NDIR)

Measurement range

400 to 2000 ppm (Note 1). Up to 10000ppm extended range (Note 2)

Measurement interval

2 seconds


±70 ppm±3% of reading (Notes 3 and 4)

Pressure dependence

+ 1.6 % reading per kPa deviation from normal pressure

Response time

2 minutes by 90%

Operating temperature

0 to 50°C

Operating humidity

0 to 85% RH non condensed

Storage temperature

-40 to 70°C

Dimensions (mm)

33.5 x 20 x 8.5 mm (max dimensions)


< 8 grams

Power supply

4.5V to 5.25V unprotected against surges and reverse connection

Power consumption

300 mA peak, 30 mA average

Life expectancy

15+ years

Compliance with

Emission:EN 61000-6-3:2007, EN 61000-6-4:2007

Immunity:EN 61000-6-1:2007

RoHS directive 2011/65/EU

Serial communication

UART, Modbus protocol (Note 5). Direction control pin for direct 

connection to RS485 receiver integrated circuit.

Alarm output, Open Collector

1000/800 ppm Normal state is conducting max 100 mA.

Transistor open at CO2 High, OR Power Low, OR at Sensor Failure

PWM output, 1 kHz

0 to 100% duty cycle for 0 to 2000 ppm

3.3V push-pull CMOS output, unprotected


Maintenance-free for normal indoor applications with SenseAir®

Note 1:  Sensor is designed to measure in the range 400 to 2000 ppm with specified in the table accuracy. Nevertheless exposure to concentrations below 400 ppm may result in incorrect operation of ABC algorithm and shall be avoided for model with ABC on.

Note 2:  Sensor provides readings via UART in the extended range but the accuracy is degraded compared to specification in the table one.
Note 3:  In normal IAQ applications. Accuracy is defined after minimum 3 weeks of continuous operation with ABC on. However, some industrial applications do require maintenance. Please, contact SenseAir for further information!
Note 4:  Accuracy is specified over operating temperature range. Specification is referenced to certified calibration
mixtures. Uncertainty of calibration gas mixtures (+-2% currently) is to be added to the specified accuracy for absolute measurements.
Note 5:  See specification { Modbus on SenseAir_R_S8 rev_P11_1_00.doc preliminary specification}

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