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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.
2y
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Personalise Touch sensing Portable USB Lighter Rechargeable Flameless No Gas Cigar Cigarette Windpro
Feature:1.You can ignite freely in harsh environments such as plateaus and strong winds!2. Touch screen cross arc: lightly touch, fast ignition.3. Cool technology: alloy material, polished through more than ten processes, and surface treated with PVD infestation process.4.USB convenient charging: available, computer, power bank, car, etc.Type: induction double arcProcess: PVD ice platingColor: multi-color optionalMaterial: Zinc AlloyPackage Included:1 x electric lighter
8mo
VERIFIED
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High Precision ph Meter with batteries, buffer powders and hard box. Low energy Consumption. Auto Calibration. Auto TEMP Compensation. Build-in High-Precision Chip.Notice: 1.This meter can test any solution, including strong acids, alkali and viscous samples like shampoo. But it cannot test solids like soil and fabric directly, they need to be mixed with water, beforehand.2. Moreover, strong acid and alkali will greatly affect the service life of the electrode. This is inevitable even if you buy a much expensive acidity meter. 3.The glass bulb sensor of the electrode is fragile. Do not touch the bulb sensor by hard tools or fingers, and handle with care when cleaning.
2y
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Features:1 Dedicated to the measurement of magnetic field intensity on the surface of magnetic materials, namely Magnetic Flux Density B2 Applied Range: Permanent magnet material measurement, mechanical parts residual magnet measurement, magnetic separator working magnetic field, speaker measurement, iron remover measurement, DC motor measurement3 The unit can be switched and the backlight can be adjustable4 Compact size and easy to carry. It is convenient to measure the magnetic fieldParameters:Accuracy: ±5% (full range satisfied)Wide range: 0-24000 GsRange: 200 mT, 2000 mT (automatic range switching)Measuring range: 0-2400 mT (24000G)Minimum resolution: 10 μT, 4-bit displayPower supply:one 9 V batteryWorking temperature:0 ~ 50Storage temperature:-20 ~ 50Shape size:160 mm × 80 mm × 32 mmDevice weight:260 gHall probe:Longitudinal Hall probe with wireDO NOT UNSCREW PROBEcare should be taken when snapping off front cap to expose sensitive probe for measurement1. What is Gaussian?Gauss is a unit of magnetic field. 5000 Gauss represents your magnet with a maximum magnetic field of 5,000 Gauss.2. How much can Gauss be achieved by magnetism?This question is very general, and we don’t know how to answer it and make you satisfied. Because the magnet’s magnetic level is related to many factors, such as the grade of magnets, the specifications of the magnet, the thickness and so on.But we have collected some common specifications of magnet Gauss for your reference Such as 10 * 4 N35 Gaussian material can reach about 3000-3200 Gauss, 10 * 5 to about 3400-3600 Gauss. The surface magnetic field of a single NdFeB magnet is 3000-5000G, ferrite 300-800G, samarium cobalt, and AlNiCo 2000G. Neodymium iron boron should be considered as a very high permanent magnet, but it is difficult to reach 5000 or more.3. How many Gaussian magnets are the largest?N35, N38 is probably up to 2000GS. If the size is bigger, N35 can reach 3500GS at most, N38 can reach 3800GS. If anyone tells you that he/she has a magnet above 10,000 gausses, you must marry them first, because they have new technology.In general, the Gaussian surface of the magnet is such that it is inversely proportional to the area and is proportional to the thickness.4. How do you know how big a Gaussian magnet is?We usually use a Gauss meter to measure the Gaussian magnet surface. However, the Gaussian values measured at different positions on the surface of the magnet are different, and the Gaussmeters have different measured data, and the error is relatively large.5. What is the difference between a Gaussian magnet and a magnetic flux? Both Gaussian and flux measurements are made to determine the performance of the magnet. The reproducibility of magnetic flux is better than Gaussian, more stable, and the error is not too big. Note: Gaussian (Gs) is the unit of measure for magnetic field lines. 1T=10000 Gs
2y
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650W Power Supply Unit 80Plus Bronze CertifiedPSU Features 1 x 24-Pin ATX connector 1 x 8-Pin (4+4) EPS12V CPU Connector 2 x 6+2-Pin PCEI Connectors 5 x sata power connectors 3 x pata connectors 1 x floppy connectorsAll cash/ card & instant eft payments welcome instore Cell/WhatsApp: 082 259 2543Shop 1: 0219037668Shop 2: Shop 3: 0219030668Computerworld Kuilsriver90 van Riebeeck rd,Omnicron building,Next to The Riverbar/ Goodhope TyresKuilsriver Operating Times: Mon-Fri: 09:30 - 17:30 Saturday: 10:00 - 14:00 Sundays: ClosedItems Available: 3
4mo
COMPUTERWORLD KUILSRIVER
3
Radeon RX 470 Miner8GB GDDR5 / 1 x DVI-D Port 8-Pin power connector 1 x DVI-D Port Double fans Comes with dvi to hdmi converter All cash/ card & instant eft payments welcome instore Cell/WhatsApp: 082 259 2543Shop 1: 0219037668Shop 2: Shop 3: 0219030668Computerworld Kuilsriver90 van Riebeeck rd,Omnicron building,Next to The Riverbar/ Goodhope TyresKuilsriver Operating Times: Mon-Fri: 09:30 - 17:30 Saturday: 10:00 - 14:00 Sundays: ClosedItems Available: 5
4mo
COMPUTERWORLD KUILSRIVER
3
It is in a very good condition and it was not used. It comes in its ackaging
18h
VERIFIED
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Desktop Computer Power Supplies from R950Non Modular Power Supply24 PIN Main Connector 8(4+4) Pin EPS12V x 18(6+2) Pin PCI-E x 2 650W - R950 750W - R1200All cash/ card & instant eft payments welcome instore Cell/WhatsApp: 082 259 2543Shop 1: 0219037668Shop 2: Shop 3: 0219030668Computerworld Kuilsriver90 van Riebeeck rd,Omnicron building,Next to The Riverbar/ Goodhope TyresKuilsriver Operating Times: Mon-Fri: 09:30 - 17:30 Saturday: 10:00 - 14:00 Sundays: ClosedItems Available: 2
4mo
COMPUTERWORLD KUILSRIVER
10
Mobile CEIL UPS & Electrical Distribution Cabinet-A57133 ,1 available, priced per item. We are a second hand shop with branches in Milnerton and Montague Gardens. Large selection of goods under one roof. 2ndhandwarehouse.com
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THERMALTAKE ARGB UNIVERSAL CPU COOLER (UX100)R350Power connector: 3-pin power connector Fan speed controller: PWMCompatible Intel Socket/ Slot: LGA 755, 1150, 1151, 1155, 1156, 1200Compatible AMD socket/ slot: AM2, AM2+, AM3, AM3+, AM4, FM1, FM2, FM2+All cash/ card & instant eft payments welcomeCell/WhatsApp: 082 259 2543Shop 1: 0219037668Shop 2: Shop 3: 0219030668Computerworld Kuilsriver90 van Riebeeck rd,Omnicron building,Next to The Riverbar/ Goodhope TyresKuilsriver Operating Times: Mon-Fri: 09:30 - 17:30 Saturday: 10:00 - 14:00 Sundays: Closed Items Available: 1
4mo
COMPUTERWORLD KUILSRIVER
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Bissell Spot Clean Pro Wet Vaccuum (North America)-A51991 ,1 available, priced per item. We are a second hand shop with branches in Milnerton and Montague Gardens. Large selection of goods under one roof. 2ndhandwarehouse.com
21h
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