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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:

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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

Item	S8 Residential Article no. 004-0-0013
Target gas	CO2
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
Accuracy	±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)
Weight	< 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	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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