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  2. Total dissolved solids - Wikipedia

    en.wikipedia.org/wiki/Total_dissolved_solids

    TDS = k e EC. where TDS is expressed in mg/L and EC is the electrical conductivity in microsiemens per centimeter at 25 °C. The conversion factor k e varies between 0.55 and 0.8. [5] Some TDS meters use an electrical conductivity measurement to the ppm using the above formula. Regarding units, 1 ppm indicates 1 mg of dissolved solids per 1,000 ...

  3. Parts-per notation - Wikipedia

    en.wikipedia.org/wiki/Parts-per_notation

    At 1 ppm the solution is a very pale yellow. As the concentration increases the colour becomes a more vibrant yellow, then orange, with the final 10,000 ppm a deep red colour. In science and engineering , the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities , e.g. mole fraction or ...

  4. Grain per gallon - Wikipedia

    en.wikipedia.org/wiki/Grain_per_gallon

    Water chemists measure water impurities in parts per million (ppm). For understandability, hardness ordinarily is expressed in grains of hardness per gallon of water (gpg). The two systems can be converted mathematically.

  5. Per mille - Wikipedia

    en.wikipedia.org/wiki/Per_mille

    In India, the premium per mille is the rate expressed as thousandths of the sum assured. ... Visualisation of 1%, 1‰, 1‱, 1 pcm and 1 ppm as fractions of the ...

  6. Benzisothiazolinone - Wikipedia

    en.wikipedia.org/wiki/Benzisothiazolinone

    Methylisothiazolinone, at 100 ppm (0.01%) in cosmetic products is causing contact allergy and allergic contact dermatitis in the consumer. Benzisothiazolinone is known to be a sensitiser in man and has induced sensitisation at circa 20 ppm in gloves." [10]

  7. Useful conversions and formulas for air dispersion modeling

    en.wikipedia.org/wiki/Useful_conversions_and...

    Here are the conversion factors for those various expressions of wind speed: 1 m/s = 2.237 statute mile/h = 1.944 knots 1 knot = 1.151 statute mile/h = 0.514 m/s 1 statute mile/h = 0.869 knots = 0.447 m/s. Note: 1 statute mile = 5,280 feet = 1,609 meters

  8. Canadian import duties - Wikipedia

    en.wikipedia.org/wiki/Canadian_import_duties

    Canadian import duties is the amount of tax or tariff paid while importing goods into Canada. The Canada Border Services Agency collects the tariff on all imported goods. [ 1 ] The collection, administration and imposition of such duties is administered by the Customs Tariff Act .

  9. List of high commissioners of Canada to India - Wikipedia

    en.wikipedia.org/wiki/List_of_high_commissioners...

    The High Commission of Canada is located at 7/8 Shantipath, Chanakyapuri, New Delhi 110 021, India. As fellow members of the Commonwealth of Nations, diplomatic relations between Canada and India are at governmental level, rather than between heads of state. Thus, the countries exchange high commissioners, rather than ambassadors.