{"id":4303,"date":"2018-11-16T00:16:02","date_gmt":"2018-11-16T08:16:02","guid":{"rendered":""},"modified":"2025-06-04T14:42:40","modified_gmt":"2025-06-04T21:42:40","slug":"4303","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/4303","title":{"rendered":"Go Direct Ethanol Vapor Troubleshooting and FAQ"},"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-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\"><a href=\"\/product\/go-direct-ethanol-vapor\/\">Go Direct<sup>&reg;<\/sup> Ethanol Vapor<\/a> (<nobr>GDX-ETOH<\/nobr>)<\/h3>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p><a href=\"\/manuals\/GDX-ETOH\">Specifications and User Guide<\/a><\/p>\n<\/div>\n<div class=\"wp-block-column is-vertically-aligned-center 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.gdx-etoh._hero.001-scaled.jpg\" alt=\"\"\/><\/figure>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\">Troubleshooting<\/h3>\n<p><strong>General:<\/strong> Press the power button on the sensor to turn it on. Connect your sensor as described in the <a href=\"https:\/\/www.vernier.com\/til\/get-started\/go-direct\">Getting Started instructions for your device<\/a>. (The green LED will flash to indicate the sensor is connected.)<\/p>\n<ul class=\"wp-block-list\">\n<li><strong>Primary Test: <\/strong>Place the sensor over a sample containing 1% ethanol. The readings will rise within a minute to near 1%.<\/li>\n<li><strong>Secondary Test: <\/strong>Verify that the sensor reads 0.01% or less in air after warming up for 5 minutes.<\/li>\n<li><strong>Tertiary Test: <\/strong>Check the calibration screen to make sure the live reading is stable when not exposed to ethanol after warming up for 5 minutes.<\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Tips<\/h3>\n<ol class=\"wp-block-list\">\n<li>Did you allow the sensor to warm up? There is a 5 minute warm up period each time you turn the sensor on.<\/li>\n<li>Is your data collection time long enough? Diffusion of gases is a fairly slow process and there are delays in readings.<\/li>\n<li>Are you collecting in a controlled environment? Use the 250 mL Nalgene collection bottle and split stopper that is included with the sensor for best results.<\/li>\n<li>Is your expected concentration of ethanol too high for the sensor? If you are testing something with an expected ethanol concentration above 3%, dilute the sample before collecting.<\/li>\n<\/ol>\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\/2858\/\">Do the ethanol sensors need to warm up?<\/a><\/li>\n<li><a href=\"\/til\/2859\/\">Can Vernier ethanol sensors be used in liquid?<\/a><\/li>\n<li><a href=\"\/til\/2860\/\">Ethanol Sensor never reads zero.<\/a><\/li>\n<li><a href=\"\/til\/2861\/\">Do you have written instructions for experiments that use the Vernier ethanol sensors? <\/a><\/li>\n<li><a href=\"\/til\/2862\/\">How do I use the Ethanol sensor with a CO\u2082 Gas sensor to measure fermentation?<\/a><\/li>\n<li><a href=\"\/til\/2864\/\">Do I need to calibrate Vernier ethanol sensors?<\/a><\/li>\n<li><a href=\"\/til\/2854\/\">What is the range of the Vernier ethanol sensors?<\/a><\/li>\n<li><a href=\"\/til\/2906\/\">Can I use Vernier ethanol sensors to measure the amount of ethanol produced from a fermentation?<\/a><\/li>\n<li><a href=\"\/til\/4340\/\">Why does the split stopper not hold the shaft of the Go Direct Ethanol Vapor in place?<\/a><\/li>\n<li><a href=\"\/til\/4341\/\">Why does the Go Direct Ethanol Vapor read 100% after calibration?<\/a><\/li>\n<li><a href=\"\/til\/15786\/\">Go Direct sensor does not connect to LabQuest 2 via Bluetooth.<\/a><\/li>\n<li><a href=\"\/til\/15056\/\">How do I replace the battery in a Go Direct Wand-Style Sensor?<\/a><\/li>\n<li><a href=\"\/til\/6827\/\">Troubleshooting Bluetooth Connections with Go Direct Sensors<\/a><\/li>\n<li><a href=\"\/til\/12943\/\">What can I do if a Go Direct sensor's Bluetooth LED flashes red and green when I try to connect to it and the connection fails?<\/a><\/li>\n<li><a href=\"\/til\/3857\/\">Will my device work with Go Direct Sensors via Bluetooth?<\/a><\/li>\n<li><a href=\"\/til\/3085\/\">How do I know if my LabQuest will work with Go Direct Sensors and Go Wireless devices?<\/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>Range: 0% to 3%<\/li>\n<li>Response Time: 90% of full scale in 60 seconds (after initial warm up)<\/li>\n<li>Range: 0% to 3%<\/li>\n<li> Accuracy<br \/>\u26ac Factory calibration: \u00b11.5% at 3%<br \/>\u26ac Custom calibration (1-3%): \u00b10.5% at 3%<br \/>\u26ac Custom calibration (0.1-1%): \u00b10.3% at 1%<\/li>\n<li>Connections:<br \/>\u26ac Wireless: Bluetooth<sup>\u00ae<\/sup> v4.2 (wireless range 30 m unobstructed) <br \/>\u26ac Wired: USB 2.0 full speed<\/li>\n<li>Battery: <a href=\"http:\/\/www.vernier.com\/gdx-bat-650\">650 mA Li-Poly<\/a><br \/>\u26ac Battery Life (single, full charge): ~8 hours continuous data collection<br \/>\u26ac Battery Life (lifetime): 2 \u2013 5 years (typical)<\/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>For experiments looking at rate of change, calibration is not necessary. For quantitative analysis, calibration is recommended. Use a two-point procedure for best results. See the <a href=\"\/manuals\/GDX-ETOH\">user manual<\/a> for how to prepare standards for calibration. See also, <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<h3 class=\"wp-block-heading\">Battery Troubleshooting<\/h3>\n<ol class=\"wp-block-list\">\n<li><span style=\"font-weight: 400;\">If the sensor can be turned on when connected by USB but not when disconnected from USB, it is likely that the battery just needs to be charged. <\/span><br \/>\u26ac <span style=\"font-weight: 400;\">Try charging the sensor for several hours. <\/span><\/li>\n<li><span style=\"font-weight: 400;\">If the sensor still won\u2019t turn on when disconnected from USB, try swapping the battery with a working sensor to see if the problem follows the battery or stays with the sensor.<\/span><br \/>\u26ac If the problem stays with the sensor, the battery is probably not the issue.<br \/>\u26ac If the problem follows the battery, <span style=\"font-weight: 400;\">the battery has likely reached its end of life.<\/span><\/li>\n<li><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">If you intend to use this sensor wirelessly, its battery will need replacing<\/span>. <\/span><br \/><span style=\"font-weight: 400;\"><a href=\"\/product\/go-direct-650-mah-replacement-battery\/\">Go Direct&reg; 650 mAh Replacement Battery<\/a> (<nobr>GDX-BAT-650<\/nobr>)<\/span><\/li>\n<li>See <a href=\"\/til\/15056\/\">How do I replace the battery in a Go Direct Wand-Style Sensor?<\/a> for more information (including a <a href=\"https:\/\/youtu.be\/BRLhaOUjmaI\">video<\/a>).<\/li>\n<\/ol>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p class=\"has-text-align-center has-very-light-gray-background-color has-background\"><span style=\"font-weight: 400;\"><strong>Rechargeable batteries are covered by a one-year warranty.<\/strong><\/span><br \/>Batteries <span style=\"font-weight: 400;\">should last two to five years in typical use. <\/span><\/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\/micro-usb-to-usb-c-cable\/\">Micro USB to USB-C Cable<\/a> (<nobr>CB-USB-C-MICRO<\/nobr>)<\/li>\n<li><a href=\"\/product\/go-direct-charge-station\/\">Go Direct<sup>&reg;<\/sup> Charge Station<\/a> (<nobr>GDX-CRG<\/nobr>)<\/li>\n<li><a href=\"\/product\/electrode-support\/\">Electrode Support<\/a> (<nobr>ESUP<\/nobr>)<\/li>\n<li><a href=\"\/product\/stir-station\/\">Stir Station<\/a> (<nobr>STIR<\/nobr>)<\/li>\n<li><a href=\"\/product\/biochamber-2000\/\">BioChamber 2000<\/a> (<nobr>BC-2000<\/nobr>)<\/li>\n<li><a href=\"\/product\/biochamber-250\/\">BioChamber 250<\/a> (<nobr>BC-250<\/nobr>)<\/li>\n<li><a href=\"\/product\/grommets-for-co2-gas-sensor\/\">Grommets for CO<sub>2<\/sub> Gas Sensor<\/a> (<nobr>CO2-GROM<\/nobr>)<\/li>\n<li><a href=\"\/product\/ethanol-sensor\/\">Ethanol Sensor<\/a> (<nobr>ETH-BTA<\/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\/go-direct-650-mah-replacement-battery\/\">Go Direct&reg; 650 mAh Replacement Battery<\/a> (<nobr>GDX-BAT-650<\/nobr>)<\/li>\n<li><a href=\"\/product\/micro-usb-cable\/\">Micro USB Cable<\/a> (<nobr>CB-USB-MICRO<\/nobr>)<\/li>\n<li><a href=\"\/product\/ethanol-cap-assemblies-3\/\">Ethanol Cap Assemblies (3)<\/a> (<nobr>ETH-CAPS<\/nobr>)<\/li>\n<li><a href=\"\/product\/6-stopper-for-ethanol-sensor\/\">#6 Stopper for Ethanol Sensor<\/a> (<nobr>ETH-STOP<\/nobr>)<\/li>\n<li><a href=\"\/product\/tape-for-ethanol-sensor\/\">Tape for Ethanol Sensor<\/a> (<nobr>ETH-TAPE<\/nobr>)<\/li>\n<li><a href=\"\/product\/250-ml-nalgene-bottle-w-lid\/\">250 mL Nalgene Bottle w\/Lid<\/a> (<nobr>CO2-BTL<\/nobr>)<\/li>\n<\/ul>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Specifications and User Guide Troubleshooting General: Press the power button on the sensor to turn it on. Connect your sensor as described in the Getting&#8230;<\/p>\n","protected":false},"author":8971,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[4773,7172,4783,7173],"class_list":["post-4303","post","type-post","status-publish","format-standard","hentry","tag-ethanol","tag-etohmain","tag-gdx-etoh","tag-gdx-etohmain"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/4303","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\/8971"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=4303"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/4303\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=4303"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=4303"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=4303"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}