{"id":4311,"date":"2014-09-29T10:00:42","date_gmt":"2014-09-29T15:00:42","guid":{"rendered":"https:\/\/www.coleparmer.com\/blog\/?p=4311"},"modified":"2019-09-24T11:20:07","modified_gmt":"2019-09-24T17:20:07","slug":"5-frequently-asked-questions-about-conductivity","status":"publish","type":"post","link":"https:\/\/www.coleparmer.com\/blog\/5-frequently-asked-questions-about-conductivity\/","title":{"rendered":"5 Frequently Asked Questions about Conductivity"},"content":{"rendered":"

Conductivity<\/a> measures the electrolytes in a solution. When water is polluted, its conductivity increases. Measuring conductivity can indicate how much pollution is in a water sample. This is tested by the ability of the solution to conduct electric current. From the water we drink to the water we swim in, conductivity is a crucial measurement.<\/p>\n

\"Oakton\u00ae<\/a>

Oakton\u00ae Waterproof CON 450 Portable Meter with Probe<\/p><\/div>\n

    \n
  1. How does temperature affect conductivity readings?<\/strong><\/li>\n<\/ol>\n

    It depends on the solution you are measuring. The effect of temperature is greatest in low conductivity (or low ionic strength) solutions. In most cases, there will be a 2% increase per \u00b0C for most aqueous solutions. However, organics have very different temperature curves.<\/p>\n

      \n
    1. How are conductivity and TDS related?<\/strong><\/li>\n<\/ol>\n

      Salts, minerals, and dissolved gases contribute to conductivity, meaning conductivity indicates the amount of dissolved materials in a solution. TDS can give you a fairly accurate measurement when comparing the status of a single source (such as NaCL). Yet when comparing two different types of solutions it may be error-prone. Calibrate the meter using the same dissolved materials that are in the test solution.<\/p>\n

        \n
      1. What is the difference between conductivity and salinity?<\/strong><\/li>\n<\/ol>\n

        The probe is the same for both, but a salinity meter has a correction factor applied to the reading. The correction factor takes the conductivity reading and converts it to ppm of a specific salt (which varies by manufacturer).<\/p>\n

          \n
        1. Are conductivity probes interchangeable with meters?<\/strong><\/li>\n<\/ol>\n

          No. The cell constant may be different and the pin configurations are typically different. The type of thermistor used for temperature compensation is also different.<\/p>\n

            \n
          1. How and when do I need to calibrate the probe?<\/strong><\/li>\n<\/ol>\n

            Use a standard solution in the range of samples you are testing to calibrate the probe. Place the probe in the standard solution, condition, and rinse the probe in a second sample of the standard solution. Then use a third sample of standard solution to calibrate, and adjust the cell constant until the specified value is displayed. Recalibrate when you change ranges or if readings seem inaccurate.<\/p>\n

            View our selection of <\/em>conductivity meters<\/em><\/a> and <\/em>conductivity calibration solutions<\/em><\/a>.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

            Conductivity measures the electrolytes in a solution. When water is polluted, its conductivity increases. Measuring conductivity can indicate how much pollution is in a water sample. This is tested by the ability of the solution…<\/p>\n","protected":false},"author":20,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[361,362],"class_list":["post-4311","post","type-post","status-publish","format-standard","hentry","category-water-sampling","tag-conductivity","tag-conductivity-meter"],"yoast_head":"\n5 Frequently Asked Questions about Conductivity | from Cole-Parmer Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.coleparmer.com\/blog\/5-frequently-asked-questions-about-conductivity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"5 Frequently Asked Questions about Conductivity | from Cole-Parmer Blog\" \/>\n<meta property=\"og:description\" content=\"Conductivity measures the electrolytes in a solution. 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