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S12 CO₂

Senseair S12 CO₂ is an ultra-compact, high-precision true NDIR CO₂ sensor engineered for reliable CO₂ measurement in space- and power-constrained applications, delivering Senseair Signature Performance built on decades of expertise in true NDIR gas sensing. Developed as a micro-format CO₂ sensor, Senseair S12 CO₂ enables true NDIR performance in designs where size, power consumption and long-term stability are critical. Designed for battery-powered and wireless systems, it complies with key indoor air quality requirements and modern standards.

Featuring a solid-state optical design with an LED light source and non-dispersive infrared technology, Senseair S12 CO₂ delivers accurate and stable CO₂ measurements while maintaining extremely low power consumption. It is well suited for demand-controlled ventilation and long-life indoor air quality systems where consistency and reliability are essential.

Defining attributes

SMD Reflow Solderable
True NDIR CO₂ Sensing
Compliant with Building Standards
Maintenance Free
Ultra Low Power Consumption
Very Low Peak Current
Highly Accurate
Ultra Compact "Micro" Format

We at Senseair believe in quality and accuracy. When it comes to gas measurement, you want a sensor you can always trust without the need for maintenance. Senseair S12 CO₂ is maintenance free, compensates for long-term drift, allowing the sensor to deliver dependable performance throughout its operational lifetime. This makes Senseair S12 CO₂ a strong choice for systems that require stable CO₂ measurement over many years without recalibration.

Senseair S12 CO₂ can be used in a wide range of indoor air quality applications. Using LED-based NDIR technology in a micro-format sensor ensures reliable and repeatable CO₂ measurement while keeping power consumption low, enabling long-term deployment in modern smart buildings, wireless devices and embedded systems.

Article number	012-0-0001
Operating principle	Non-dispersive infrared (NDIR)
Measured gas	CO₂
Measurement range	0–10 000ppm
Accuracy	±30 ppm ±3 % of reading
Operating range RH	<95 % RH
Operation range °C	-10 - 60 °C
Response time	<30s
Power supply	3.05 - 5.5 V
Peak current	20 mA
Average current	<34µA
Communication	I2C, UART
Outputs	Digital
Compliance	ANSI/ASHRAE Standard 62.1-2022, RESET Standard Grade B, Title 24, Title 24, California Energy Code, WELL Building Standard® (WELL v2™)
Maintenance	Maintenance-free
Life expectancy	>15 years
Dimensions	18 x 15 x 7 mm (L x W x H)
Weight	<3
Storage conditions	-40 – 85°C