Best Technical Precision Air Purifiers

Have you gone nose blind to household odors or dust?Check multiple measures of your home's air quality. This air quality monitor has a FAN onboard that allows REAL-TIME accurate monitoring of temperature (in C), humidity, formaldehyde (HCHO), total volatile organic compounds (TVOC), and micron-sized fine particulate dust (PM2.5/PM1.0/PM10). Formaldehyde is an environmental carcinogen yet odorless at lower concentrations. Detect low levels of airborne TVOCs not perceivable to the human nose.Problems with allergies?See when you need to change your home's air filter. Watch the levels of indoor total volatile organic compounds and formaldehyde drop when the windows are opened. Learn where air quality is poorer and where your allergies can worsen. Allergies that are difficult to control with unexplained coughing, runny nose, and shortness of breath may be signs of sick building syndrome.Tips on Use:-If the HCHO, temp, or PM2.5 is inaccurate, use the "Sensor Set" Menu found under SET (press D), then SENSOR (press A) to further calibrate device readings.-Calibrate if 0.000 indoor readings noted.-Large variations & 9.999 TVOC readings do not indicate an error as this instrument is a sensitive electronic nose; environmental TVOCs vary much and high TVOCs often can result from interference from benign fragrances or odors.-Air Pollution Level vs. air quality index (AQI) are separate & different assessments of air quality.Specifications:-2.8" color 240 x 320 LCD-DC 5V USB charging w/ 2-3 hrs battery life-HCHO: 0-1.999 mg/m³-TVOC: 0-9.999 mg/m³-PM1.0/PM2.5/PM10: 0-999 μg/m³-Multiple user options including continuous monitoringAs the only US based retailer of this item, we have a chemist on staff to answer any technical questions. We also include a 20+ pgs eBook on Gas & Air Quality Hazards and Updated Manual emailed after purchase.