Cubic Particulate Matter Sensor Enabling Low Noise and Stable Performance Across Indoor Air Quality Applications

Enhanced Sensor Performance with In-house Low Noise Fan Technology

Particulate matter (PM) is one of the key pollutants affecting indoor air quality (IAQ). In IAQ applications such as air purifiers, fresh air systems, and air quality monitors, PM concentration monitoring serves as an important basis for air quality sensing, enabling automatic airflow adjustment based on real-time environmental conditions. As the IAQ devices often feature compact installation, quiet indoor operation, and long-term continuous use, PM sensors are expected to meet increasingly stringent requirements for compact size, low-noise operation, stable performance, and long service life.

In response to the industry demand, Cubic, a leading manufacturer of gas sensors and analyzers, has developed compact particulate matter sensor based on light scattering technology for real-time measurement of airborne particle concentrations. To enhance sensor performance, Cubic has incorporated multiple engineering considerations, including detection technology, fan design, and sensor structure, into the sensor design to achieve accurate detection, reduced noise levels, stable air flow, compact size, and long lifespan:

• Accurate detection
With Cubic innovative Auto Particle Identification (API) technology, the PM sensors enable more accurate detection of PM1.0, PM2.5, and PM10 even under dynamic environmental conditions. The API technology helps improve measurement reliability under changing airflow, temperature, and particle distribution, making the sensors better suited for indoor air quality management.

• Reduced noise level
Cubic in-house fan technology is incorporated with a focus on mechanical durability, rotational stability, and validated life-cycle performance to ensure reliable operation within particulate matter sensors. The bearing system incorporates a unique oil-preserving structure that minimizes lubricant loss during rotation. By reducing the growth of internal friction over time, the design helps prevent gradual noise increase and airflow degradation, thereby maintaining stable mechanical performance throughout extended operation. The low-noise makes the PM sensors well suited for indoor environments, including residential air purifiers and bedroom applications where quiet operation is essential, even during nighttime or sleep conditions.

• Stable airflow
To ensure constant rotational speed, Cubic fan integrates FG signal feedback for closed-loop constant RPM control. Operating at 4500 RPM, the fan maintains stable airflow volume under both low and high temperature conditions. Stable airflow is critical for maintaining PM measurement consistency, particularly in applications requiring continuous environmental control, including smart ventilation systems and IAQ monitors.

• Compact size and long lifespan
Combined with a compact design and an anti-dust structure, Cubic particulate matter sensors support easy integration into space-constrained and compact devices including portable air purifiers and smart thermostats. In addition, the long service life helps align PM sensor durability with the expected operational lifetime of end devices, reducing maintenance frequency, supporting long-term stable operation in IAQ applications.

By integrating precise sensing technology, reliable fan design, and optimized sensor structure, Cubic particulate matter sensor provides a well-balanced solution for modern indoor air quality management. With core features including high accuracy, low-noise operation, and long-term stability, Cubic enables manufacturers and system integrators to optimize product performance across the entire life-cycle. Backed by extensive expertise in IAQ sensing technologies and strong capabilities in the independent R&D of IAQ sensors, Cubic supports the development of high-performance IAQ systems with enhanced reliability, and improved user experience in noise-sensitive environments.

For more detailed information, please visit https://en.gassensor.com.cn/IndoorPMSensor/list.html or contact us via [email protected]