In-Duct Instrument (Packaged Product) for monitoring Particulate Matter (PM) in HVAC and Clean Air systems.

1. Accuracy of PM Sensors:

Achieving precise measurements of particulate matter is essential for effective IAQ management. However, the accuracy of PM sensors can be compromised by factors such as humidity, varying particle sizes, and sensor placement within HVAC ducts. For instance, low-cost particle sensors (LCSs) may exhibit reduced accuracy due to environmental conditions and sensor positioning, leading to unreliable data and potential mismanagement of air quality.

2. Pressure Drop:

Integrating PM sensors into HVAC ducts can present challenges related to pressure conditions. Most sensors rely on small internal fans to draw air into their measurement chambers. However, these fans often struggle to overcome the higher pressure environments typical within HVAC ducts, leading to inadequate airflow through the sensor and compromised measurement accuracy.