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Miniature Infrared CO2 Sensor Module

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Product Name:Miniature Infrared CO2 Sensor Module

Miniature Infrared CO2 Sensor Module

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S8-4B Miniature Infrared CO2 Sensor Module General Description
The S8-4B CO2 sensor module is designed to serve as a CO2 safety switch when built-in into kerosene heaters. The sensor utilizes reliable and highly accurate infrared gas sensing technology. The electronic circuitry is optimized for low power consumption. Because of low current consumption the sensor is suitable for battery applications and has an average current consumption of 2 mA.

S8 can be customized for a variety of alarm and control applications.

S8-4B Miniature Infrared CO2 Sensor Module Key technical specification

Item	S8-4B Article no. 004-0-0061
Target gas	CO2
Operating Principle	Non-dispersive infrared (NDIR)
Measurement range	400 to 32000ppm (represented internally in digital format)
Measurement interval	30 seconds
Accuracy	±1000ppm at alarm points between 7000 and 9000 ppm (Note 1)
Pressure dependence	+ 1.6 % reading per kPa deviation from normal pressure
Gas diffusion response time	2 minutes by 90%
Operating temperature	-5 to 60 ºC
Operating humidity range	0 to 95% RH non condensed
Storage temperature	-40 to +70°C
Storage Environment	0-95% RH non condensed non corrosive gases, no contamination to kerosene
Dimensions (mm)	61 x 20 x 8.5 mm (max dimensions)
Weight	< 10 grams
Power supply	4.5 to 7.0 VDC unprotected against surges and reverse connection
Power consumption	250 mA peak, 2 mA average
Life expectancy	5+ years in normal indoor / office environments
Compliance with	Tested according Emission EN 61000-6-3:2007, EN 61000-6-4:2007 Immunity EN 61000-6-1:2007 RoHS directive 2011/65/EU
Output Alarm, Open Drain	Open drain FET; 7V/ 800mA, protected by a zener diode, normally open, 100kWpull-up resistor to power (+). 8000/6500 (Alarm/Release) Normal state is open. Transistor conducting at (CO2 > 8000ppm) OR (Unloaded Power voltage < 4.5V) OR (Loaded Power voltage < 4.0V) OR (Sensor Failure detected by self-diagnostics)
Maintenance	Forced calibration (assuming 400 ppm exposure).
Self-diagnostics	Full self-diagnostics at power up and continuously running self-diagnostics at every measurement.

Note 1: 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