{"id":5599,"date":"2015-10-23T09:00:11","date_gmt":"2015-10-23T15:00:11","guid":{"rendered":"https:\/\/www.coleparmer.com\/blog\/?p=5599"},"modified":"2019-09-24T11:12:08","modified_gmt":"2019-09-24T17:12:08","slug":"getting-false-ph-readings","status":"publish","type":"post","link":"https:\/\/www.coleparmer.com\/blog\/getting-false-ph-readings\/","title":{"rendered":"Getting False pH Readings"},"content":{"rendered":"<p>A chemical manufacturer was losing raw materials to what workers thought were erroneous <a title=\"Water pH Testers\" href=\"\/c\/water-quality-products\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">pH readings<\/a>. The manufacturer has a pH control system that activates a solenoid valve in the bottom of the tank once a specific\u00a0level is reached.<\/p>\n<p>Shortly after the tank started emptying, the workers saw the pH spike\u2014and manually shut off the valve and scrapped the batch. After this happened a few times, they began rechecking the pH of the raw material. They found it measured exactly where it was supposed to be. They even double checked the measurement with a separate tester.<\/p>\n<p>So, they requested a warranty replacement on the pH probe. After troubleshooting, they found it was actually the solenoid valve that was starting to go bad. As the valve wore out, stray electrical signals entered the mixing tank and the probe interpreted the stray signal as a change in pH.<\/p>\n<p>What\u2019s the best way to avoid erroneous readings from stray voltages in the future? A <a title=\"Solution Grounded pH Probe\" href=\"\/i\/cole-parmer-solution-grounded-ph-probe-dj-pps-no-atc-bnc\/2701800\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">solution-grounded pH probe<\/a> will combat electrical interference. The addition of a ground wire\u00a0will allow any stray electrical signals in the solution to go to the grounding wire rather than the probe\u2014eliminating any unstable or inaccurate readings.<\/p>\n<p><em>See our full selection of <\/em><a title=\"Products for Water Quality Analysis\" href=\"\/c\/water-quality-products\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"><em>pH meters and water quality products<\/em><\/a><em> and <\/em><a title=\"In-line or Submersible, Solution Grounded pH\/ORP Electrodes\" href=\"\/p\/cole-parmer-in-line-or-submersible-solution-grounded-ph-orp-electrodes\/18459\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"><em>In-line or Submersible, Solution Grounded pH\/ORP Electrodes<\/em><\/a><em>. Or check out our best selling <\/em><a title=\"Pocket pH Meter\" href=\"\/i\/oakton-ecotestr-ph-2-pocket-ph-meter\/3542301\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"><em>Oakton<sup>\u00ae<\/sup> EcoTestr<sup>\u2122<\/sup> Pocket pH tester<\/em><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A chemical manufacturer was losing raw materials to what workers thought were erroneous pH readings. The manufacturer has a pH control system that activates a solenoid valve in the bottom of the tank once a&#8230;<\/p>\n","protected":false},"author":20,"featured_media":5601,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,16,24],"tags":[1879,1878],"class_list":["post-5599","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-case-studies","category-ph-2","category-water-sampling","tag-ph-controllers","tag-ph-probe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Getting False pH Readings | from Cole-Parmer Blog<\/title>\n<meta name=\"description\" content=\"A chemical manufacturer was losing raw materials to what workers thought were erroneous pH readings. The manufacturer has a pH control system.\" \/>\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\/getting-false-ph-readings\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Getting False pH Readings | from Cole-Parmer Blog\" \/>\n<meta property=\"og:description\" content=\"A chemical manufacturer was losing raw materials to what workers thought were erroneous pH readings. The manufacturer has a pH control system.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.coleparmer.com\/blog\/getting-false-ph-readings\/\" \/>\n<meta property=\"og:site_name\" content=\"Cole-Parmer Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/antylia\" \/>\n<meta property=\"article:published_time\" content=\"2015-10-23T15:00:11+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-09-24T17:12:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/i0.wp.com\/www.coleparmer.com\/blog\/wp-content\/uploads\/2015\/10\/Cole-Parmer-Solution-Grounded-pH-Probe.gif?fit=66%2C300&ssl=1\" \/>\n\t<meta property=\"og:image:width\" content=\"66\" \/>\n\t<meta property=\"og:image:height\" content=\"300\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/gif\" \/>\n<meta name=\"author\" content=\"Cole-Parmer Blog Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@antylia\" \/>\n<meta name=\"twitter:site\" content=\"@antylia\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Cole-Parmer Blog Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Getting False pH Readings | from Cole-Parmer Blog","description":"A chemical manufacturer was losing raw materials to what workers thought were erroneous pH readings. 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