Product description A compact sensor module combining three complementary detection technologies to give integrated, actionable indoor air quality data: Laser sensor for PM2.5 — measures particulate matter to support smog and AQI monitoring for integrated air systems Electrochemical sensor for HCHO — detects formaldehyde (HCHO) to identify hazardous offgassing Semiconductor sensor for TVOC — measures total volatile organic compounds, including benzene and other VOCs Key benefits — why you need it Comprehensive coverage: three specialized sensors cover particulates (PM2.5), formaldehyde, and TVOCs so you can detect the most common and harmful indoor pollutants without multiple devices. Faster problem detection: early identification of PM2.5 spikes, HCHO leaks, or rising VOC levels helps you act sooner to reduce exposure. Integrationready: designed to feed AQI and pollutant readings into air quality monitors, building management, or HVAC control systems for automated ventilation or alerts. Practical decision support: clear pollutantspecific data enables targeted interventions (filtration, ventilation, source removal) rather than guessing. What it does (functions and performance) PM2.5 (laser): continuously senses fine particulate concentration to support smog/AQI assessment in integrated air systems. HCHO (electrochemical): selectively detects formaldehyde, a common indoor chemical hazard from building materials and furnishings. TVOC (semiconductor): monitors total VOC levels including benzene and similar compounds that affect health and comfort. Compatibility and form factor Intended for integration into air quality monitors, building automation, or HVAC control platforms that accept sensor modules for AQI and pollutant inputs. Compact, modulestyle design suited to embedded applications where space and straightforward data integration are important. Typical use scenarios Residential: monitor nursery, living room, or newly renovated spaces to detect formaldehyde offgassing and particulate pollution after cooking or cleaning. Commercial buildings and offices: feed realtime PM2.5, HCHO, and TVOC data into building management systems to trigger ventilation or filtration when thresholds are exceeded. Industrial and renovation sites: track VOCs and formaldehyde during painting, gluing, or material offgassing to protect workers and validate remediation efforts. How it solves problems Reduces uncertainty by separating particulate vs chemical hazards. Enables targeted responses (ventilate for PM2.5, remove sources for HCHO/VOC) to improve indoor air quality efficiently. Consolidates multiple pollutant measurements into a single module for simplified integration and monitoring. Notes Functions reflect the three sensor types: laser for PM2.5 (AQI/smog), electrochemical for HCHO (formaldehyde), and semiconductor for TVOC (benzene and other VOCs).