{"id":1437,"date":"2017-04-26T18:14:25","date_gmt":"2017-04-27T01:14:25","guid":{"rendered":""},"modified":"2025-04-25T08:21:01","modified_gmt":"2025-04-25T15:21:01","slug":"1437","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/1437","title":{"rendered":"ORP Sensor Troubleshooting and FAQs"},"content":{"rendered":"<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\"><a href=\"\/product\/orp-sensor\/\">ORP Sensor<\/a> (<nobr>ORP-BTA<\/nobr>)<\/h3>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p><a href=\"\/manuals\/ORP-BTA\">Specifications and User Guide<\/a><\/p>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.vernier.com\/wp-content\/uploads\/2019\/11\/product.orp-bta.hero._001.jpg\" alt=\"\"\/><\/figure>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\">Troubleshooting<\/h3>\n<ul class=\"wp-block-list\">\n<li><strong>Primary Test: <\/strong>The ORP Sensor consists of an ORP Electrode connected to an Electrode Amplifier using a BNC connector. Connect the Electrode Amplifier to the interface. Run the data-collection program and set up the ORP Sensor to read in units of mV. Place the tip of the sensor in a buffer solution of known pH and check the readings.<\/li>\n<\/ul>\n<p class=\"has-text-align-left has-very-light-gray-background-color has-background\">Typical readings, in mV, of various buffer solutions<strong><sup>*<\/sup><\/strong><br \/>\u26ac pH 4 buffer solution: 350 &#8211; 360 mV<br \/>\u26ac pH 7 buffer solution: 270 &#8211; 280 mV<br \/>\u26ac pH 10 buffer solution: 100 &#8211; 110 mV<\/p>\n<p class=\"has-text-align-left has-small-font-size\"><strong><sup>*<\/sup><\/strong> Buffer solutions can be prepared using <a href=\"\/product\/ph-buffer-capsule-kit\/\">pH Buffer Capsule Kit<\/a> (<nobr>PH-BUFCAP<\/nobr>).<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Additional Troubleshooting<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/til\/1060\/\">Do any of your sensors require special storage?<\/a><\/li>\n<li><a href=\"\/til\/1649\/\">Where can I get calibration solutions for an ORP sensor?<\/a><\/li>\n<li><a href=\"\/til\/728\/\">How can I keep my pH or ORP storage solution from spilling when the sensor is in use?<\/a><\/li>\n<li><a href=\"\/til\/1430\/\">Electrode Amplifier Troubleshooting and FAQs<\/a><\/li>\n<li><a href=\"\/til\/2467\/\">I found an ORP electrode that was stored dry. How can I test it to see if the electrode is still working?<\/a><\/li>\n<li><a href=\"\/til\/3679\/\">Why are the readings from my ORP sensor noisy?<\/a><\/li>\n<li><a href=\"\/til\/3917\/\">Can I use the ORP Sensor for Cyclic Voltammetry?<\/a><\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n<h4 class=\"wp-block-heading\"><strong>ORP ELECTRODE<\/strong><\/h4>\n<ul class=\"wp-block-list\">\n<li>Type: Sealed, gel-filled, epoxy body, Ag\/AgCl reference<\/li>\n<li>Storage solution: pH-4\/KCl solution (10 g KCl in 100 mL buffer pH-4 solution)<\/li>\n<li>Cable: 1 meter coaxial cable with BNC connector<\/li>\n<li>Redox potential range: -450 to +1100 mV<\/li>\n<li>ORP element: 99% pure platinum band sealed on a glass stem<\/li>\n<li>Temperature range: 0-60 \u00baC<\/li>\n<li>Probe Dimensions: 12 mm OD<\/li>\n<li>Impedance: ~20 k\u03a9 at 25 \u00baC<\/li>\n<\/ul>\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h4 class=\"wp-block-heading\"><strong>ELECTRODE AMPLIFIER<\/strong><\/h4>\n<ul class=\"wp-block-list\">\n<li>Input Range: \u2013450 to 1100 mV<\/li>\n<li>Resolution: 0.5 mV<\/li>\n<li>Power: 7 mA @ 5 VDC<\/li>\n<li>Factory Calibration Coefficients: slope 466.875; intercept \u2013559.793<\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Calibration<\/h3>\n<p>Calibrate? Not usually, but it depends on the circumstances surrounding your data collection.<\/p>\n<p>In most experiments done with an ORP Sensor, the precise potential in mV is not critical; rather, the large rate of change of potential is the most important factor. Thus, you should not have to perform a new calibration when using the ORP Sensor for most experiments. Use the calibration that is automatically loaded with this auto-ID sensor.<\/p>\n<p>If you are doing water quality testing or performing a chemistry experiment that requires a very accurate calibration, you will need two commercial ORP standards (see <a href=\"\/til\/1649\/\">Where can I get calibration solutions for an ORP sensor?<\/a>). Conduct a two-point calibration, as detailed in the sensor booklet: <a href=\"\/manuals\/ORP-BTA\">Specifications and User Guide<\/a><\/p>\n<p>For more information on calibrating a sensor, see <a href=\"\/til\/4011\/\">How do I calibrate my sensor?<\/a><\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Related Products<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/product\/electrode-support\/\">Electrode Support<\/a> (<nobr>ESUP<\/nobr>)<\/li>\n<li><a href=\"\/product\/ph-buffer-capsule-kit\/\">pH Buffer Capsule Kit<\/a> (<nobr>PH-BUFCAP<\/nobr>)<\/li>\n<li><a href=\"\/product\/go-direct-orp-sensor\/\">Go Direct<sup>&reg;<\/sup> ORP Sensor<\/a> (<nobr>GDX-ORP<\/nobr>)<\/li>\n<\/ul>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Replacement Parts<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/product\/ph-storage-solution\/\">pH Storage Solution<\/a> (<nobr>PH-SS<\/nobr>)<\/li>\n<li><a href=\"\/product\/storage-solution-bottles-5\/\">Storage Solution Bottles (5)<\/a> (<nobr>BTL<\/nobr>)<\/li>\n<li><a href=\"\/product\/orp-electrode-bnc\/\">ORP Electrode BNC<\/a> (<nobr>ORP-BNC<\/nobr>)<\/li>\n<\/ul>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Specifications and User Guide Troubleshooting Typical readings, in mV, of various buffer solutions*\u26ac pH 4 buffer solution: 350 &#8211; 360 mV\u26ac pH 7 buffer solution:&#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":[720,1897,1898,1899],"class_list":["post-1437","post","type-post","status-publish","format-standard","hentry","tag-maintil","tag-orp-bta","tag-orp-din","tag-orpmain"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/1437","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=1437"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/1437\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=1437"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=1437"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=1437"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}