{"id":3679,"date":"2017-05-16T19:14:47","date_gmt":"2017-05-17T02:14:47","guid":{"rendered":""},"modified":"2021-04-20T16:24:59","modified_gmt":"2021-04-20T23:24:59","slug":"3679","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/3679","title":{"rendered":"Why are the readings from my ORP sensor noisy?"},"content":{"rendered":"<p>There are a few things to consider to help improve the performance of your ORP readings:<\/p>\n<p>1) The accuracy of a new electrode is +\/- 20 mV. If you are seeing changes over time within 20 mV of a value, then it&#8217;s just noise.\u00a0<\/p>\n<p>2) If the value is drifting up or down continuously, it&#8217;s likely due to the motion of the sample. If measuring an outdoor source, it&#8217;s best to take a beaker or cup to get a sample of the water and then measure it with the ORP sensor.<\/p>\n<p>3) If the values you are getting are close to 0 mV, there may not be enough ionic activity to give a stable reading. Freshwater samples may need to have ionic strength adjuster added to them.\u00a0<\/p>\n<p>4) Residue on the tip of an ORP electrode can cause the readings to be noisy. To clean the electrode, use a soft cloth to wipe a small amount of ethyl alcohol or isopropyl alcohol around the globe-shaped tip of the probe. Rinse the tip with distilled water, and repeat the alcohol cleaning one more time.<\/p>","protected":false},"excerpt":{"rendered":"<p>There are a few things to consider to help improve the performance of your ORP readings: 1) The accuracy of a new electrode is +\/-&#8230;<\/p>\n","protected":false},"author":11015,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[2425,1897,6199],"class_list":["post-3679","post","type-post","status-publish","format-standard","hentry","tag-orp","tag-orp-bta","tag-oxidation-reduction"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/3679","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/users\/11015"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=3679"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/3679\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=3679"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=3679"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=3679"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}