GastroCHECK Gastrolyzer®


The world’s most advanced CH4 & H2 monitor gets even better with the features you requested.

Ready to purchase, make your choice below or continuing reading to learn more.

Item #: GastroCHECK

GastroCHECK Starter Package includes:

  • GastroCHECK® Gastrolyzer® CH4 & H2 Monitor
  • (50) Breath Sampling Mouthpieces
  • Breath Sample Line
  • GastroCHART™ Database Software with USB cable
  • Reference Materials: Ledochowski Book, Manual, Quick-start Guides, & numerous tools

– Free Lifetime Telephone Training & Support
– 2 Year Warranty on Monitor & Sensor

SKU: GastroCHECK-Gastrolyzer Category:


GastroCHECK® Gastrolyzer®

gastro 30 years logo



Since the 1980s, the Gastrolyzer® range of breath methane (CH4) and hydrogen (H2) monitors have been the gold standard to aid in the detection and management of gastrointestinal disorders.


  • SIBO (small intestinal bacterial overgrowth)
  • Intolerances & Malabsorption Issues:
      • Lactose Intolerance
      • Fructose Intolerance
      • Fructan Intolerance
      • Sucrose Intolerance
      • Sorbitol Intolerance
      • Xylitol Intolerance

Key Features

  • null
    Rapid Measurement | non-invasively measures both methane (CH4) and hydrogen (H2) in lungs
  • null
    2 Sampling Modes | mouthpiece sampling and breath bag sampling for out of office/take home test kits
  • null
    Automatic Breath Sample | Oxygen (02) reading is used as a correction factor to ensure an accurate breath sample every time
  • null
    Automatic Reminders | monitors reminds you when to calibrate
  • null
    Highest Infection Control | mouthpieces with one-way valves and filters
  • null
    Remote Software Updates | always have latest version of the GastroCHART™ software
  • null
    Instant on | shortest warmup in the industry spend more time testing less time waiting
  • null
    Large Color Touch Screen | simple to use, large color LCD Touch Screen works with gloves
  • null
    Exhalation Guide | coaches patient through entire exhalation process to ensure proper technique and accurate results
  • null
    Simple Maintenance | simple calibration, only required monthly using on-device step by step instructions
  • null
    GastroCHART Database | intersects with included patient management software manages tests and maximizes your time
  • null
    Financing & Leasing Options | let us help you incorporate a GastroCHECK® by structuring a plan that meets your needs

GastroCHART Software

  • Included with every monitor purchase at no additional fee
  • Maximize your time and reimbursement with the ability to test up to 10 patients simultaneously
  • Software manages study with automatic countdown timers which prompts and manages the complete study
  • Automatic charting to aid in interpretation and analysis of patient results
  • Built in protocols for various studies with the ability to customize them
  • Unlimited Patient Database
  • Ability to save and/or email data into PDF, Excel, etc.
  • Customize look and feel of handouts
  • Automatic software updates
Download SoftwareSoftware User Manual

GastroCHECK® Gastrolyzer®
Technical Specifications

Concentration Range CH4 0-200ppm
H2 0-200ppm
O2 14-23%
Power input 230V/100V, 50Hz, 0.5-1.0 A
Fuse T 3.15 AH
Warm-up time ≤ 2 minutes
Calibration frequency Every 4 weeks
Display Full color touchscreen
Detection Principle Electrochemical sensor (O2 & H2) Infrared (CH4)
Accuracy CH4 Resolution 1ppm
Accuracy ±10% of reading
Repeatability <5% difference in consecutive readings
H2 Resolution 1ppm
Accuracy ±10% of reading
Repeatability <5% difference in consecutive readings
O2 Resolution 0.1ppm
Accuracy ±2.5% of reading
Repeatability <5% difference in consecutive readings
Carbon monoxide cross sensitivity (H2 only) <1%
Temperature Range Operating 15-35°C (59° – 95°F)
Storage 0-40°C (32°-104°F)
Pressure Range Operating 900-1100mBar
Storage 800-1200mBar
Humidity Operating 30-75% non-condensing
Storage 15-90% non-condensing
Sensor operating life CH4 5 years
H2 2 years
O2 2 years
Dimensions Approx. 474 x310 x167 mm
Weight Approx. 8kg
Monitor construction Case: aluminum
Classification Class I ME equipment: (externally powered)
Type BF applied part
Method of sterilization (not suitable for sterilization)
Not suitable for use in oxygen rich environment
Intended for continuous use
Response Time ≤45 seconds
Warranty GastroCH4eck® without sensors 2 years
CH4, H2, O2 sensors 2 years

GastroCHECK® Gastrolyzer® Reference Materials

Quick Start GuideQuick Start Guide

GastroCHECK® Gastrolyzer® Videos

How To Use Your GastroCHECK Gastrolyzer®

Why Gastrolyzer®?

The features that matter for office efficiency and patient comfort.

gastro 30 years logo

30+ Year Heritage:

  • Most advanced and easy to use methane (CH4) and hydrogen (H2) breath analysis monitors
  • Most trusted brand of breath analysis devices in the world
  • Most relied on brand by the world’s leading research institutions and organizations

2 Year Warranty NC e1560732114668

2 Year Warranty:

  • Industry leading warranty for absolute peace of mind
  • Covers all monitor components including the sensors

Rapid Results:

● Immediate results on the monitors at your fingertips

GastroCHECK – Methane (CH4) & Hydrogen (H2)

2 Sampling Options:

  1. Mouthpiece Sampling
  2. Take Home Test Kits

Gastro+ – Hydrogen (H2) Only

  1. Mouthpiece Sampling Only

Simple User Interface:

  • Simple to use, large color LCD touchscreen
  • Easy to follow and intuitive menus with icons
  • Exhalation guide – coaches patients through entire exhalation process to ensure proper technique and accurate results

Training, Support & Service:

  • Online training included
  • Lifetime telephone technical support
  • All service & support handled in USA

Save Time:

  • Instant boot up
  • No warm up
  • Sample Correction

Save Money Other

Low Operating & Maintenance Costs:

  • Inexpensive accessories: – GastroCHECK $5.95 per study
  • Simple calibration with automatic reminders: – GastroCHECK only required monthly

Screen Shot 2019 08 02 at 1.18.17 PM

Highest Levels of Infection Control:

  • Individually wrapped and multi-use for the day, GastroCHECK® mouthpieces are specifically designed with integrated filtration to remove >99% of airborne bacteria, 99% of viruses and any moisture from the patient’s breath

Software Included:

  • GastroCHART™ Unlimited Patient Database & patient management software
  • Maximize your time and reimbursement with the ability to test up to 10 patients simultaneously
  • Software manages study with automatic countdown timers which prompts and manages the complete study
  • Automatic charting to aid in interpretation and analysis of patient results
  • Built in protocols for various studies with the ability to customize them


Engineering with Purpose

  • The sleek design of GastroCHECK® makes unit mobile with the use of a cart
  • Designed specifically for healthcare professionals
monitor and breath bag


Do you bill insurances for medical services?

CPT Vertical33

Gastrolyzer® BREATH H2 / CH4 TEST

CPT Code: 91065 – Breath hydrogen/methane test (eg, for detection of lactase deficiency, fructose intolerance, bacterial overgrowth, or oro-cecal gastrointestinal transit).

Contact us for State Specific Reimbursement

Benefits to Practice & Patients

Benefits Title
480 benefits

Benefits to Practice

  • Low cost of study supplies
  • Reimbursable by insurance, average reimbursement $85.00
  • Maximize reimbursement by keeping testing in the office
  • Simple to use by staff
  • Lowest maintenance compared to other devices on the market
  • Rapid results – no need to send out of office, save money, and save time
  • Flexible sampling options: Mouthpiece sampling or take-home test kits (GastroCHECK only)
  • Interacts with GastroCHART™ patient management and database software – works with timers to assist with work-flow, manage studies and maximize reimbursement (up to 10 patients simultaneously)
480 benefits

Benefits to Patient

  • Non-invasive test for fast and accurate diagnosis and relief
  • Safe and simple test to perform – not physically strenuous – only requires patients to breathe
  • Covered by most insurance carriers
  • Simple prep – no need to drink a nasty tasting solution that will “clean you out”
  • Patient can go back to work after the test instead of taking a full sick day
  • Test managed by patient’s local Gastro office ensures faster & more reliable results
  • HBT test offers a starting point to craft a diet to assist in avoiding problematic foods

Simple Testing Process

Conducting a breath test is simple, non-invasive, and rapid results.


Schedule your patients for test


Patient performs breath test study


Rapid Results


Interpret Results & Devise a plan

GastroCHECK® CH4 & H2 Monitor

1. Upset Gut
2. Perform Study 1
3. Instant Results
4. Interpret Results 1
Gaso nb

One monitor can do it all…..

Jade Gastro New

Why Breath CH4 & H2 test?

Ability to Detect & Manage Multiple Disorders

Hydrogen Breath Testing (HBT)

HBT is a non-invasive, and specific means of aiding in the diagnosis of small bowel sugar malabsorption. HBT makes use of gut bacteria’s ability to digest sugars and convert these to hydrogen & methane , which is then absorbed into the blood and can be measured in exhaled breath1.

The test is commonly used in adult and pediatric gastroenterology departments to aid in the diagnosis of malabsorption of the sugars lactose, fructose and sucrose etc. It is also used to investigate small intestinal bacterial overgrowth (SIBO)2.

The Gastrolyzer® range is world renowned for delivering accurate hydrogen & methane breath testing, cited by clinical leaders in gastroenterology, such as Robert Heuschkel3 and Way Seah Lee4

Multiple e1567380192622

Ability to Detect & Manage Multiple Disorders

  • SIBO
  • Intolerances & Malabsorption: lactose, fructose, sorbitol, sucrose, fructan, xylitol, etc.

Save Money

Reimbursable/Revenue Stream

  • Average $85 – CPT Code: 91065 – Breath hydrogen/methane test (eg, for detection of lactase deficiency, fructose intolerance, bacterial overgrowth, or oro-cecal gastrointestinal transit)

Low Cost & Maintenance

  • Inexpensive consumables
  • Simple maintenance

Simple Testing

  • Easy to administer test. Breath testing is not regulated under C.L.I.A.

Non Invasive e1567380247561


  • Works on a breath sample, no bodily fluids or medications required for test

Rapid Results

  • The monitor provides rapid results shown in parts per million (ppm) of Methane (CH4) & Hydrogen (H2) which makes interpreting a patient’s results quick and easy. No waiting for results from the lab.

Lungs e1565894782611

Accurate & Reliable

  • 40+ year hydrogen breath test (HBT) heritage, shows it is reliable analytical method
  • Relied on by hospitals & research institutions for over 4 decades


Small Intestinal Bacterial Overgrowth (SIBO)
Intolerances/Malabsorption Issues: lactose, fructose, sorbitol, sucrose, fructan, xylitol, & more

Gut Issue

Ideal for the following industries

raster (1)


The Gastrolyzer®️ line is relied on by researchers at leading institutions to study functional gastrointestinal disorders.



Hydrogen (H2) and Methane (CH4) testing as a tool to aid in the diagnosis and management of functional gastrointestinal disorders…



Whether you’re utilizing our Gastrolyzers®️ in your own practice or you’re working with a physician group or hospital system to help consult…



Whether you’re utilizing our Gastrolyzers®️ in your own practice or you’re working with a physician group or hospital system to help consult…

raster (3)

Primary Care Physicians

Primary care physicians and their staff are uniquely positioned to be the first line of defense in helping to evaluate patients…


Naturopathic Doctors

ND’s work with their patients to prevent and treat acute and chronic illness and disease by emphasizing nature’s organic self-healing process, the vis medicatrix naturae.

Why is it important?

Girl Gaso Sick

The Gastrolyzer® hydrogen and methane breath test is a non-invasive way to assist doctors as an aid in the diagnosis and management of a number of conditions and disorders. One such condition the Gastrolyzer® tests for is lactose intolerance. Nearly 70% of the global population is intolerant to lactose. In the United States alone thirty to fifty million Americans are lactose intolerant. Additionally, the Gastrolyzer® can test for all these intolerances and malabsorption issues: fructose, sorbitol, sucrose, fructan, xylitol, & more. As well as testing for Small Intestinal Bacterial Overgrowth (SIBO).

About 30% of the world’s population are methane producers. These people produce methane because they have a specific species of archaea (a different type of organism from bacteria) in their gut called Methanobrevibacter Smithii that feeds on hydrogen produced in the gut which is then turned into methane, which is released into the gut and ultimately out into the breath. It takes 4 molecules of hydrogen to make 1 molecule of methane, which is why the methane breath measurement will typically be less than that of hydrogen, but has the same diagnostic implications. It is important to test for methane as well as hydrogen because people can have symptoms from the methane that is released into their gut, but it would go undetected if only hydrogen is measured. Methane slows down transit time by slowing the peristalsis reflex, which is the muscle that moves food along the digestive tract. Constipation is the most common clinical symptom of a methane producer. It has been found that there is a direct correlation between the amount of Methanobrevibacter Smithii in the gut, the amount of methane released in the breath, and the severity of the constipation.

Gastrolyzer® breath testing is inexpensive, non-invasive, and is a revenue stream for the practice. Plus, the test is easy on the patient, efficient, and is covered by most insurance carriers.

And since the results are immediate, the breath test allows doctors to arrive at a diagnosis quickly and accurately and allows patient to have better quality of life and gut health.

Hydrogen Breath Testing (HBT) is typically offered to patients reporting or with indications of the following clinical complaints or disorders (regardless of when these complaints occur):

Indications of GI symptoms: abdominal pain, nausea, vomiting, GI-bleeding, bloating, flatulence, constipation, diarrhea, steatorrhea, Chronic Inflammatory bowel disease, IBS (Irritable bowel syndrome), meteorism/tympanites (excessive flatulence), issues with oro-cecal transit time (slow or fast digestion), and intolerances/malabsorption to certain foods.

Indications of non-GI symptoms: muscle wasting, retardation of growth in children, weight loss, fatigue, dizziness, headaches, pale skin, a fast or irregular heartbeat, shortness of breath, chest pain, cognitive problems, cold hands and feet, fever.

Disorders suspected by physician: Crohn’s disease, cirrhosis of the liver, pancreatic insufficiency, ileocecal reflux, backwash ileitis, and anemia (due to malabsorption or Crohn’s disease).

Scientific Literature

 If you are interested in receiving supporting data, please contact us and we would be happy to search our archive of over 70+ years of research on breath analysis.

Contact Us

Frequently Asked Questions

What is the purpose of the Gastrolyzer® HBT test?

The purpose of the Hydrogen Breath Test (HBT) is to investigate unexplained gastrointestinal complaints that the patient is experiencing, such as bloating, gas, diarrhea, IBS, abdominal distention and pain, malnutrition, etc.

How does it work?

Using just a breath sample, this non-invasive test can help to determine if a patient has an intolerance to specific foods, detect and monitor these intolerances, as well as investigate a condition known as bacterial overgrowth.

How can you identify a problem just from testing a patient’s breath?

It’s very simple. When a patient has a problem digesting certain foods (or they have bacterial overgrowth), specific bacteria in their gut get exposed to the undigested food and create the gases, hydrogen (H2) and/or methane (CH4). These gases get absorbed into their blood, which then gets dumped into their lungs, and they breathe it out.

How accurate is this test?

Breath testing, and specifically HBT, has been around for over 40 years and the medical literature is very favorable regarding the accuracy of this test. As compared to other testing modalities such as cultured biopsy, the literature has demonstrated that HBT is an equally reliable analytical method.

What is the advantage of the test?

This test is similar to other diagnostic tests that you may order for the patient, but with the added advantage that it is non-invasive – the patient can be back at work ornormal activity the same day. As with any other test, HBT offers a view into the overall picture of the patients’ gastrointestinal health.

Is this test reimbursable?

Yes, using CPT code 91065. If the test is performed in the office and the physician interprets the results, you can be reimbursed the Global fee. You’ll use the one code regardless of which substrate/test (i.e. lactose, fructose, glucose for SIBO, etc.) that you are performing.

How many patients can I test simultaneously?

There is no specific limit to the number of patients that you can test simultaneously, however, there may be a limited number that you can manage effectively at one time. Generally, six patients at one time seems to be the most manageable number for one staff member to manage.

What is bacterial overgrowth?

Small Intestine Bacterial Overgrowth (SIBO), is a condition where a specific type of bacteria which are normally only present in the colon, overgrow into the small intestine. These bacteria should not be in the small intestine and if they are present, they will feed off of the food (carbohydrates) consumed daily and create many of the gastrointestinal problems that people experience.

Gastrolyzer® Breath H2 & CH4 Monitors




GastroCHECK® Gastrolyzer® Accessories

Additional information

Weight 28 lbs
Dimensions 27 × 18 × 11 in
Options: Choose Monitor Only or Discounted Complete Package

Individual, Package