Cubic NDIR High-Accuracy CO2 Sensor Meets ASHRAE New Standard

High-Precision CO2 Sensor Compliant with ASHRAE New Standard

Applying CO2 sensors to realize air ventilation control, called Demand Control Ventilation (DCV), has become increasingly popular to achieve energy savings in buildings. Recently, ASHRAE has published the new standard guidelines under Addendum ab: ANSI/ASHRAE Addendum ab to ANSI/ASHRAE Standard 62.1-2022. It is worth noting for CO2 sensors incorporated within the DCV systems, the addendum mandates the specific requirements as follows：

6.2.6.1.3.4 CO2 sensors shall be certified by the manufacturer to be accurate within ±75 ppm at concentrations of 600, 1000, and 2500 ppm when measured at sea level at 77°F (25°C). Sensors shall be factory calibrated and certified by the manufacturer to require calibration not more frequently than once every five years. Upon detection of sensor failure, the system shall provide a signal that resets the ventilation system to supply the required minimum quantity of outdoor air (Vbz) to the breathing zone for the design zone population (Pz).

Based on the rules outlined in Addendum ab to Standard 62.1-2022, CO2 sensors should meet the following five key points:

1) CO2 sensors in the DCV system should be highly accurate, meeting the accuracy requirements within the concentration range of 600, 1000 and 2500 ppm, with a deviation not exceeding +/- 75 ppm.

2) CO2 sensors in DCV should be free from frequent calibration and maintain stability for at least five years.

3) CO2 sensors should have a long lifespan, consistent with a fresh air system.

4) CO2 sensors should provide continuous monitoring and measurement capabilities.

5) CO2 sensors should be cost-effective to be integrated into the DCV system on a large scale.

Adhering to ASHRAE Standard, Cubic, a company specializing in smart gas sensors and advanced gas analyzers, has established mature gas sensing technology platform of Non-Dispersive Infrared (NDIR) technology, enabling CO2 sensors superior attributes of high accuracy, long lifespan, and continuous monitoring.

Cubic NDIR CO2 sensors, leveraging Cubic's extensive 20-year expertise in the NDIR technology field, is ideal for the DCV system, which stands at the forefront of technological innovation. It is designed with specific infrared wavelengths and exhibits the critical advantage of high accuracy at ±75 ppm at concentrations of 600, 1000, and 2500 ppm, ensuring excellent performance in diverse environments. Adopted with matrix calibration at low (-10℃), normal (25℃), and high (40℃) temperatures and multiple points of CO2 concentration, Cubic NDIR CO2 sensors ensures high accuracy across a wider temperature and measurement range. Additionally, selecting a strict component for the NDIR CO2 sensors guarantees a 15-year lifespan. Based on the auto-zero-calibration mechanism, Cubic NDIR CO2 sensors can autonomously maintain accuracy across its entire lifetime without frequent manual calibration. Besides, Cubic NDIR CO2 sensors also features continuous monitoring of CO2 concentration levels to provide real-time concentration data to the DCV system.

Complemented by a robust and reliable supply chain, Cubic capitalizes on the virtuous synergy of technological innovation, supply chain management, and lean production practices to effectively meet customers' burgeoning demands and provide holistic gas sensing solutions. At the same time, by implementing large-scale production and melding self-developed components for integration, Cubic offers meticulous cost control to provide highly cost-effective products to customers. Cubic also provides tailored service to meet customers’ flexible and diverse product requirements.

Leveraging two decades of expertise in gas sensing technology, Cubic stands as a leading manufacturer committed to remaining attentive to evolving policies within the ASHRAE requirements and is dedicated to the continued delivery of proficient and dependable gas sensing solutions to customers globally. Cubic remains steadfast in its commitment to providing qualified and reliable gas sensing solutions, aligning with ASHRAE standards and addressing the dynamic needs of customers worldwide.