Humidity meter in Western Cape | Gumtree Classifieds in Western Cape

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8 in 1 Air Quality meter pm2.5 pm10 pm1.0 TVOC O3 Ozone temp humidity AQI monitor

R 3,000

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TVOC = Total Volatile Organic Compounds.Should be below 0.3mg/m3 or 300ug/m3 to be safe but even up to 0.5mg/m3 would be acceptable. A typical house indoors will display no more than 0.15mg/m3 TVOCSources of VOCspaints, paint strippers and other solvents.wood preservatives.aerosol sprays.cleansers and disinfectants.moth repellents and air fresheners.stored fuels and automotive products.vinegar.While candles, barbecues and gas stoves all make for a nice home, they also increase the presence of butanal, one of the most common volatile organic chemicals also found in cigarettes.dry-cleaned clothing.alcohol in santisers ie isopropanol is a common solvent for home and professional use. It’s often used as a disinfecting agent, and it also evaporates quickly, making it easy for large amounts to build up in the home. Make sure to have proper ventilation to maintain air quality.Formaldehyde is very common and used as a preservative.Nail polish contains harsh solvents such as acetone which is also used in furniture polish and wallpaper.Benzene is found in paint, glue, carpeting, etc. Carbon Disulfide is found in chlorinated water.Dichlorobenzene found in mothballs and deodorizers.Terpenes found in fragrant products such as soap or laundry detergents.----------------------pm2.5 pm10 pm1.0Particulate Matter (PM) BasicsMost studies indicate PM2.5 at or below 12 μg/m3 is considered healthy with little to no risk from exposure. If the level goes to or above 35 μg/m3 during a 24-hour period, the air is considered unhealthy and can cause issues for people with existing breathing issues such as asthma.Example sizes: dust:9umred blood cells: 7-8umTechnically, there isn't a safe level of PM10, as any amount of particulate matter in your air isn't a good thing. Keeping your exposure to PM10 concentrations below 54.0 µg/m³ is the best way to prevent any short or long-term health effects from developing.Less than 40 is considered Good.80-120 is fair with 120-300 very poor and more than 300 extremely poor.PM1 are extremely fine particulates with a diameter of fewer than 1 microns and may potentially be more harmful to human health.Examples: dust, combustion particles, bacteria and viruses.-------------O3Ozone at ground level – not to be confused with the ozone layer in the upper atmosphere – is one of the major constituents of photochemical smog. It is formed by the reaction with sunlight (photochemical reaction) of pollutants such as nitrogen oxides from vehicle and industry emissions and volatile organic compounds (VOCs) emitted by vehicles, solvents and industry. As a result, the highest levels of ozone pollution occur during periods of sunny weather.Recommended exposure limit for ozone is 0.2mg/m3 or 0.075ppm. Ozone levels of 5ppm or higher are considered immediately dangerous to life or health.