Indoor Air Quality Meters

Look for meters that measure the pollutants important to your situation: PM2.5/PM10 for particulate matter, CO2 for ventilation, VOCs for chemical emissions, temperature and humidity for comfort, and optionally formaldehyde (HCHO) or CO for combustion risk

Accuracy varies by sensor type and calibration; electrochemical sensors are common for gases, optical sensors for particulates. Compare specifications like detection range, resolution, stated accuracy or error margin, and whether the device offers periodic calibration or references to laboratory standards

Useful features include multi-parameter display (PM2.5, CO2, VOCs, temp/humidity), real-time readings with trend/graphing, alarm thresholds, battery operation or USB power, data logging or app connectivity, and a clear, easy-to-read interface

Budget meters under about (price varies) typically cover basic PM and VOC or CO2 estimates; mid-range models (roughly $50–$200) commonly offer multiple sensors, better accuracy, and data logging; higher-priced professional units provide laboratory-grade sensors, formaldehyde/CO detection, and calibration services

Portable meters are useful for spot checks and testing different rooms, while fixed monitors give continuous long-term data; choose portable for flexibility and fixed devices if you need continuous alerts and long-term trend analysis

Follow manufacturer recommendations: keep sensors clean and dry, replace particulate inlets or filters if specified, avoid exposure to extreme temperatures or high humidity, and use built-in calibration routines or professional calibration services when accuracy drifts

Apps and data logging are helpful for tracking trends, exporting data, and receiving alerts; they add value if you want historical records or remote monitoring, but are less critical for simple spot measurements