{"id":2171,"date":"2017-07-19T16:08:15","date_gmt":"2017-07-19T23:08:15","guid":{"rendered":""},"modified":"2025-04-29T11:13:24","modified_gmt":"2025-04-29T18:13:24","slug":"2171","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/2171","title":{"rendered":"Tris-Compatible Flat pH Sensor Troubleshooting and FAQs"},"content":{"rendered":"<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 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\/tris-compatible-flat-ph-sensor\/\">Tris-Compatible Flat pH Sensor<\/a> (<nobr>FPH-BTA<\/nobr>)<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/manuals\/FPH-BTA\">Specifications and User Guide<\/a><\/li>\n<li><a href=\"\/til\/4110\/\">Which model pH sensor do I have? (How old is my pH sensor?)<\/a><\/li>\n<\/ul>\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.fph-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> Does it read approximately 4 in its storage solution? (pH 13-14 indicates 0 volts, possibly a defective or damaged sensor)<\/li>\n<li><strong>Secondary Test:<\/strong> Take readings in fresh buffers, NOT distilled water! If no buffers are available, try it in vinegar (~ pH 2.5-3.5) and ammonia (~ pH 10.5-11.5). If readings do not change when the sensor is placed in different solutions, the sensor is possibly defective or damaged.<\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Additional Troubleshooting<\/h3>\n<h4 class=\"wp-block-heading\"><strong>OPERATION<\/strong><\/h4>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/til\/2169\/\">My Tris-Compatible Flat pH Sensor reads mV instead of pH.<\/a><\/li>\n<li><a href=\"\/til\/1286\/\">Why doesn't my pH Sensor read pH 7 in distilled or deionized water?<\/a><\/li>\n<li><a href=\"\/til\/730\/\">The pH electrode I have been using no longer seems to work or is slow to respond. Is there anything I can do to fix it?<\/a><\/li>\n<li><a href=\"\/til\/1599\/\">What type of liquids cause problems for the pH Sensor?<\/a><\/li>\n<li><a href=\"\/til\/2166\/\">The liquid inside my pH Sensor is low or gone. Will it still work?<\/a><\/li>\n<li><a href=\"\/til\/638\/\">Will I get interference when I put two sensors in the same solution?<\/a><\/li>\n<li><a href=\"\/til\/2985\/\">Is the flat pH sensor more durable than regular pH sensor?<\/a><\/li>\n<\/ul>\n<h4 class=\"wp-block-heading\"><strong>CALIBRATION<\/strong><\/h4>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/til\/4011\/\">How do I calibrate my sensor?<\/a><\/li>\n<li><a href=\"\/til\/2341\/\">How do I calibrate a sensor in Logger <i>Pro<\/i>?<\/a><\/li>\n<li><a href=\"\/til\/2442\/\">How do I save a custom calibration to my pH sensor?<\/a><\/li>\n<li><a href=\"\/til\/3641\/\">During calibration, what are the typical potential output readings for the PH-BNC electrode?<\/a><\/li>\n<\/ul>\n<h4 class=\"wp-block-heading\"><strong>MAINTENANCE and STORAGE<\/strong><\/h4>\n<ul class=\"wp-block-list\">\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\/369\/\">Where do I get pH or ORP Storage Solution? (Buffer Storage Solution)<\/a><\/li>\n<li><a href=\"\/til\/706\/\">What is the best way to clean the glass bulb of the pH electrode?<\/a><\/li>\n<li><a href=\"\/til\/1060\/\">Do any of your sensors require special storage?<\/a><\/li>\n<li><a href=\"\/til\/2174\/\">I bought your pH buffer capsules. Can I make storage solution for my pH Sensors with this kit?<\/a><\/li>\n<li><a href=\"\/til\/2201\/\">My pH sensors were stored dry. Will they still work?<\/a><\/li>\n<li><a href=\"\/til\/2270\/\">How do I dispose of my pH sensor?<\/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<ul class=\"wp-block-list\">\n<li>Electrode type: Double-junction, sealed, gel-filled, Ag\/AgCl reference, polycarbonate body<\/li>\n<li>Membrane style: Flat glass<\/li>\n<li>Range: pH 0\u201314 <small>(Some sodium error in ranges greater than pH 12 due to thicker glass and higher impedance values)<\/small><\/li>\n<li>Accuracy with new electrode (pH): \u00b10.2<\/li>\n<li>Temperature range: 5 to 80 \u00b0C (readings not compensated)<br \/>\u26ac Isopotential pH: pH 7 (point at which temperature has no effect)<\/li>\n<li>Storage solution: pH 4\/KCl solution (10 g KCl in 100 mL buffer pH-4 solution)<\/li>\n<li>Dimensions<br \/>\u26ac Shaft diameter: 12 mm OD<br \/>\u26ac Cable: 1 meter coaxial cable with BNC connector<\/li>\n<li>Default calibration coefficients: slope \u20137.78; intercept 16.34<\/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 class=\"wp-block-paragraph\">Calibrate? Usually no. However, for the most accurate measurements with this sensor, we recommend calibration. It is a simple process that only takes a few minutes. Custom calibrations can also be stored directly onto the sensor.<\/p>\n<ul class=\"wp-block-list\">\n<li>For calibration instructions, see: <a href=\"\/til\/4011\/\">How do I calibrate my sensor?<\/a><\/li>\n<li>To save a calibration to a particular sensor, see: <a href=\"\/til\/2442\/\">How do I save a custom calibration to my pH sensor?<\/a><\/li>\n<li><a href=\"\/til\/3625\/\">Where do I get pH buffer solutions?<\/a><\/li>\n<\/ul>\n<p class=\"has-text-align-center has-very-light-gray-background-color has-background wp-block-paragraph\"><strong>Typical Calibration Voltages<\/strong><br \/>\u26ac In pH 4 buffer: ~1.56 V<br \/>\u26ac In pH 7 buffer: ~1.19 V<br \/>\u26ac In pH 10 buffer: ~0.82 V<\/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-8f761849 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\/microstirrer\/\">Microstirrer<\/a> (<nobr>MSTIR<\/nobr>)<\/li>\n<li><a href=\"\/product\/stir-station\/\">Stir Station<\/a> (<nobr>STIR<\/nobr>)<\/li>\n<li><a href=\"\/product\/drop-counter\/\">Drop Counter<\/a> (<nobr>VDC-BTD<\/nobr>)<\/li>\n<li><a href=\"\/product\/precision-volume-dispenser\/\">Precision Volume Dispenser<\/a> (<nobr>DC-DISP<\/nobr>)<\/li>\n<li><a href=\"\/product\/go-direct-tris-compatible-flat-ph\/\">Go Direct<sup>&reg;<\/sup> Tris-Compatible Flat pH<\/a> (<nobr>GDX-FPH<\/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\/Maintenance Parts<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/product\/flat-ph-electrode-bnc\/\">Flat pH Electrode BNC<\/a> (<nobr>FPH-BNC<\/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\/ph-storage-solution\/\">pH Storage Solution<\/a> (<nobr>PH-SS<\/nobr>) (500 mL bottle)<\/li>\n<li><a href=\"\/product\/storage-solution-bottles-5\/\">Storage Solution Bottles (5)<\/a> (<nobr>BTL<\/nobr>)<\/li>\n<li><a href=\"\/product\/electrode-amplifier\/\">Electrode Amplifier<\/a> (<nobr>EA-BTA<\/nobr>)<\/li>\n<\/ul>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Troubleshooting Additional Troubleshooting OPERATION CALIBRATION MAINTENANCE and STORAGE Specifications Calibration Calibrate? Usually no. However, for the most accurate measurements with this sensor, we recommend calibration&#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":[3552,3551,3550,648,3549,720,2294],"class_list":["post-2171","post","type-post","status-publish","format-standard","hentry","tag-flat-ph","tag-flatph","tag-flatphmain","tag-fph-bta","tag-fphmain","tag-maintil","tag-tris"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/2171","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=2171"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/2171\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=2171"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=2171"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=2171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}