Senseair has developed the “S12 CO2” as a next-generation CO2 sensor for demand-controlled ventilation (DCV) in zero-energy buildings and battery-powered indoor air quality (IAQ) monitoring. The new model is approximately 75% smaller in volume than its predecessors and can be used as a surface-mount device (SMD) on circuit boards while maintaining high accuracy and low power consumption. This enables sensor integration in applications where installation was previously difficult. Senseair has already begun sample distribution and plans to initiate mass production in 2026.
In recent years, legal frameworks to enhance the energy efficiency of buildings have become stricter worldwide. Particularly within the EU, the Energy Performance of Buildings Directive adopted in 2024 requires new buildings to comply with the zero-emission standard. These buildings have very low energy needs, which are largely covered by onsite and nearby renewable energy sources. This legislation will come into effect for new public buildings by 2028 and for all other new buildings by 2030.
To contribute to achieving this zero-emission level for buildings, intelligent DCV systems are emerging as a highly effective alternative to conventional temperature-controlled ventilation. DCV systems automatically adjust the ventilation based on CO2 levels, thus enabling both reduction in energy consumption and comfortable IAQ. However, DCV systems require the installation of CO2 sensors across the entire building, and constraints in design and installation space have so far proved to be major challenges.
Senseair’s new “S12 CO2” sensor features a redesigned structure based on the company’s NDIR (non-dispersive infrared absorption) sensor technology. With a measurement range of 400 – 10,000 ppm and an accuracy of +/- (30 ppm + 3% of reading), the new sensor maintains the performance of its predecessor CO2 sensors, “Sunrise” and “Sunlight,” but comes with a significantly smaller packaging size of 18 mm × 15 mm × 7 mm. This compact size enables the effective use of available space. It enables SMD reflow surface mounting on circuit boards, offering a discreet and elegant installation in air conditioning equipment or wall-mounted monitors without compromising design aesthetics.
For the retrofit market, where cable installation is often challenging, the Senseair “S12 CO2” sensor offers the same ultra-low power consumption as the “Sunrise” and “Sunlight” sensors. Its energy efficiency, SMD-solderable design, and compact size enable battery-powered CO2 monitors that allow easy installation with a wide degree of freedom.
The “S12 CO2” sensor will be deployed for IAQ monitoring in building energy management systems (BEMS) within office buildings and commercial facilities, primarily in Europe, North America, and Asia. Further application fields include air conditioning units and heat exchangers in the residential sector.
Like its predecessors, the “S12 CO2” sensor will comply with globally recognised standards, including ANSI/ASHRAE Standard 62.1-2022 Addendum d, RESET Grade B, and WELL Building Standard® (WELL v2TM), ensuring worldwide relevance and impact.
