--- title: Gastrolyzer | Help Centre description: Click for help and articles about the Gastrolyzer product --- [Skip to content](https://support.bedfont.com/en/knowledge/gastrolyzer#main-content) English Show submenu for translations [Customer portal](https://support.bedfont.com/ticket-portal) ![Bedfont logo-high resolution png-2](https://support.bedfont.com/hs-fs/hubfs/Bedfont%20logo-high%20resolution%20png-2.webp?width=120&height=122&name=Bedfont%20logo-high%20resolution%20png-2.webp) - [Raise a Support Ticket](https://ticket.bedfont.com/) Open main navigation Close main navigation - [Raise a Support Ticket](https://ticket.bedfont.com/) - English Show submenu for translations - [Customer portal](https://support.bedfont.com/ticket-portal) - Go to www.bedfont.com Go to www.bedfont.com Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Help Centre](https://support.bedfont.com/en/knowledge) 2. [Gastrolyzer](https://support.bedfont.com/en/knowledge/gastrolyzer) # Gastrolyzer Click for help and articles about the Gastrolyzer product ## FAQ - [What is correction factor (CF) with the GastroCH4ECK?](https://support.bedfont.com/en/knowledge/what-is-correction-factor-cf) - [How often should I replace the sample line on the GastroCH4ECK Gastrolyzer?](https://support.bedfont.com/en/knowledge/how-often-should-i-replace-the-sample-line) ## On screen symbols - [Why does my GastroCH4ECK say 'PWR' in a pink circle?](https://support.bedfont.com/en/knowledge/power-supply-has-reached-its-lifetime-on-gastroch4eck) - [Why does my GastroCH4ECK show a red cross and a circles with a code inside it?](https://support.bedfont.com/en/knowledge/ch4-sensor-sync-error-on-gastroch4eck) - [Low Battery On Gastro+](https://support.bedfont.com/en/knowledge/low-battery-on-gastro) - [Why is my Gastro+ showing SEN01 warning and a date in red?](https://support.bedfont.com/en/knowledge/sensor-change-overdue) - [Why does my Gastro+ have a pink circle with 'SEN01' and a date?](https://support.bedfont.com/en/knowledge/sensor-change-warning-on-gasto) - [Why does my GastroCH4ECK have a red cross, pink circle saying 'PUR03 (1)' and a retry symbol?](https://support.bedfont.com/en/knowledge/ch4-sensor-connectivity-error) - [Why does my GastroCH4ECK have a red cross, a pink circle saying 'PUR03 (2)' and have a retry symbol?](https://support.bedfont.com/en/knowledge/ch4-sensorcheck-sum/end-char-error-on-gastroch4eck) - [Why is my GastroCH4ECK showing a red cross and a pink circle?](https://support.bedfont.com/en/knowledge/h2-sensor-zero-failure-on-gastroch4eck) - [Why does my GastroCH4ECK have a red cross, pink circle and retry button?](https://support.bedfont.com/en/knowledge/ch4-sensor-reading-error-on-gastroch4eck) - [Why does my GastroCH4ECK have a red cross next to a pink circle?](https://support.bedfont.com/en/knowledge/ch4-sensor-failure-on-gastroch4eck) - [Why does my Gastro+ have a red cross symbol?](https://support.bedfont.com/en/knowledge/calibration-failed-on-gastro) - [Why does my GastroCH4ECK have a blue thermometer?](https://support.bedfont.com/en/knowledge/gastroch4eck-is-too-cold) - [Why does my Gastro+ show a pink bin with a D-piece pointing to it?](https://support.bedfont.com/en/knowledge/d-piece-reminder-on-gastro) - [Red Cross and Retry Button on GastroCH4ECK](https://support.bedfont.com/en/knowledge/red-cross-and-retry-button-on-gastroch4eck) - [Why is my GastroCH4ECK showing a warning sign and a gas cylinder connected to a GastroCH4ECK?](https://support.bedfont.com/en/knowledge/calibration-is-due-on-gastroch4eck) - [Why does my GastroCH4ECK say 'SEN01' and a date in red?](https://support.bedfont.com/en/knowledge/sensor-change-is-overdue-on-gastroch4eck) - [Why is my Gastro+ showing a warning sign with a cylinder?](https://support.bedfont.com/en/knowledge/calibration-reminder-on-gastro) - [Hour Glass On Gastro+](https://support.bedfont.com/en/knowledge/hour-glass-on-gastro) See less ▼ ## Device function issues - [GastroCH4ECK Won't Turn On](https://support.bedfont.com/en/knowledge/gastroch4eck-wont-turn-on) - [What do I do if the batteries have leaked in my Gastro+ Gastrolyzer?](https://support.bedfont.com/en/knowledge/battery-leak-in-gastro) - [The touchscreen is unresponsive on my Gastro+](https://support.bedfont.com/en/knowledge/touch-screen-is-unresponsive-on-gastro) - [Why is the Gastro+ not turning on?](https://support.bedfont.com/en/knowledge/gastro-not-powering-on) - [Why is my Gastro+ reading incorrectly?](https://support.bedfont.com/en/knowledge/incorrect-readings-on-gastro) - [How do I know if my Gastro+ needs a firmware update?](https://support.bedfont.com/en/knowledge/firmware-update-on-gastro) - [Calibration Gas Cylinder Is Empty After Only Using A Few Times On GastroCH4ECK](https://support.bedfont.com/en/knowledge/calibration-gas-cylinder-is-empty-after-only-using-a-few-times-on-gastroch4eck) See less ▼ ## Maintenance - [GastroCH4ECK Maintenance Guidelines](https://support.bedfont.com/en/knowledge/gastroch4eck-maintenance-guidelines) - [Gastro+ Routine Maintenance Guidelines](https://support.bedfont.com/en/knowledge/gastro-routine-maintenance-guidelines) ## Infection control - [GastroCH4ECK Infection Control Guidelines](https://support.bedfont.com/en/knowledge/gastrocheck-infection-control-article) - [Gastro+ Infection Control Guidelines](https://support.bedfont.com/en/knowledge/gastro-infection-control-maintenance-guidelines) ## Firmware - [Gastro+™ - Latest Firmware Version](https://support.bedfont.com/en/knowledge/gastro-latest-firmware-update) - [GastroCHECK® - Latest Firmware Version](https://support.bedfont.com/en/knowledge/gastrocheck-latest-firmware-update) - [NObreath](https://support.bedfont.com/en/knowledge/nobreath#main-content) - [FAQ](https://support.bedfont.com/en/knowledge/nobreath#faq) - [On screen symbols](https://support.bedfont.com/en/knowledge/nobreath#on-screen-symbols) - [Device function issues](https://support.bedfont.com/en/knowledge/nobreath#device-function-issues) - [Infection control](https://support.bedfont.com/en/knowledge/nobreath#infection-control) - [Safe Breath Testing During COVID-19](https://support.bedfont.com/en/knowledge/nobreath#safe-breath-testing-during-covid-19) - [Firmware](https://support.bedfont.com/en/knowledge/nobreath#firmware) - [Smokerlyzer](https://support.bedfont.com/en/knowledge/smokerlyzer#main-content) - [FAQ](https://support.bedfont.com/en/knowledge/smokerlyzer#faq) - [On screen symbols](https://support.bedfont.com/en/knowledge/smokerlyzer#on-screen-symbols) - [Device function issues](https://support.bedfont.com/en/knowledge/smokerlyzer#device-function-issues) - [Maintenance](https://support.bedfont.com/en/knowledge/smokerlyzer#maintenance) - [Infection control](https://support.bedfont.com/en/knowledge/smokerlyzer#infection-control) - [Safe Breath Testing During COVID-19](https://support.bedfont.com/en/knowledge/smokerlyzer#safe-breath-testing-during-covid-19) - [Firmware](https://support.bedfont.com/en/knowledge/smokerlyzer#firmware) - [Gastrolyzer](https://support.bedfont.com/en/knowledge/gastrolyzer#main-content) - [FAQ](https://support.bedfont.com/en/knowledge/gastrolyzer#faq) - [On screen symbols](https://support.bedfont.com/en/knowledge/gastrolyzer#on-screen-symbols) - [Device function issues](https://support.bedfont.com/en/knowledge/gastrolyzer#device-function-issues) - [Maintenance](https://support.bedfont.com/en/knowledge/gastrolyzer#maintenance) - [Infection control](https://support.bedfont.com/en/knowledge/gastrolyzer#infection-control) - [Firmware](https://support.bedfont.com/en/knowledge/gastrolyzer#firmware) - [Medi-Gas Check](https://support.bedfont.com/en/knowledge/medi-gas-check#main-content) - [FAQ](https://support.bedfont.com/en/knowledge/medi-gas-check#faq) - [ToxCO](https://support.bedfont.com/en/knowledge/toxco#main-content) - [On screen symbols](https://support.bedfont.com/en/knowledge/toxco#on-screen-symbols) - [Device function issues](https://support.bedfont.com/en/knowledge/toxco#device-function-issues) - [Maintenance](https://support.bedfont.com/en/knowledge/toxco#maintenance) - [Infection control](https://support.bedfont.com/en/knowledge/toxco#infection-control) - [FAQ](https://support.bedfont.com/en/knowledge/faq) [![Bedfont logo-high resolution png-2-1](https://support.bedfont.com/hs-fs/hubfs/Bedfont%20logo-high%20resolution%20png-2-1.webp?width=120&height=122&name=Bedfont%20logo-high%20resolution%20png-2-1.webp "Bedfont logo-high resolution png-2-1")](http://www.bedfont.com) Bedfont Scientific Ltd - 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