{"product_id":"personal-air-quality-monitor-6-in-1","title":"6-in-1 Personal Air Quality Monitor — PM2.5, PM10, CO₂, VOC, Temperature \u0026 Humidity","description":"\u003cp\u003e\u003cstrong\u003eParticulate matter smaller than 2.5 μm penetrates alveolar tissue — this laser-scattering sensor counts every particle in real time, in the air you're breathing right now.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe PM2.5\/PM10 sensor uses laser light scattering (Mie scattering theory): a 650 nm diode laser illuminates a sample chamber, and a photodetector counts forward-scattered pulses. Pulse count per unit volume is converted to mass concentration (μg\/m³) using empirical aerosol density models. The electrochemical CO₂ sensor (NDIR — non-dispersive infrared) measures 4.26 μm CO₂ absorption. The MOX (metal-oxide) VOC sensor measures resistance changes caused by reducing gases adsorbing onto a heated tin-oxide sensing element — the same physics as a Taguchi gas sensor from 1971.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePM2.5 (0–999 μg\/m³, ±10%) + PM10 laser particle counting\u003c\/li\u003e\n\u003cli\u003eCO₂ NDIR: 400–5000 ppm (±50 ppm); VOC MOX sensor: 0–9.99 ppm equivalent\u003c\/li\u003e\n\u003cli\u003eTemperature: ±0.5 °C; Relative Humidity: ±3% RH\u003c\/li\u003e\n\u003cli\u003e2.8-inch colour TFT with AQI gauge, historical graph; USB-C rechargeable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eEvery purchase directly funds independent physics research at the Golden Physics Project.\u003c\/em\u003e\u003c\/p\u003e","brand":"Golden Physics Project","offers":[{"title":"Default Title","offer_id":54144349864228,"sku":"GPP-PREP-AQMONITOR","price":94.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/2879\/9524\/files\/photo-1638734254958-4a11c989e9bb.jpg?v=1780369660","url":"https:\/\/shop.goldenphysics.org\/products\/personal-air-quality-monitor-6-in-1","provider":"Golden Physics Project","version":"1.0","type":"link"}