Digester Gas Flow Meter Applications

Reliable and Accurate Digester Gas Flow Measurement

Digesters provide the anaerobic environment necessary for organic material waste, such as sewage, manure, or vegetable matter, to decompose into digestate and biogas.

The gas composition resulting from the digester process tends to change over time, but most flow meters are calibrated to measure one gas type or one set gas mix. To keep the process running, a flexible and accurate gas flow meter from Fox Thermal will help you Make Downtime a Thing of the Past.

Help Me Choose A Flow Meter
Digester tanks for energy crops and agricultural waste

Fox Thermal Digester Gas Flow Meters Provide

Easy Installation and Configuration

Get up and running quickly with Fox Thermal mass flow meters for digester applications. Our meters are easy to install, easy to configure and use, and feature a non-moving-parts design that reduces maintenance costs.

Accurate Tracking of Methane Emissions

Fox Thermal gas flow meters directly measure mass flow rates, allowing agricultural, municipal, or industrial digesters to monetize carbon credits through greenhouse gas emissions allowance trading systems.

Reduced Downtime for Digester Applications

With the Gas-SelectX® feature, Fox Thermal gas flow meters don’t need to be returned to the factory for recalibration if the gas composition changes (as it often does in digesters), making downtime a thing of the past.

More About Digester Gas Flow Meter Applications

Digesters are large holding tanks used to break down organic material into biogas through an anaerobic process that biodegrades the material into a mixture of methane (CH4) and carbon dioxide (CO2).

Fox Thermal mass flow meters can be used at the digester tank outlet to measure both the temperature and flow rate of biogas from the digester to the storage or usage point.

The instrument’s wide turndown provides an accurate measurement of the digester gas produced, which can vary widely. A built-in totalizing function in certain models facilitates environmental auditing procedures of greenhouse gas emissions for Title 40 CFR Part 98 Subpart JJ.

Regular monitoring of the digester gas output flow and temperature can catch problems early. Alarms on the meter can be set to show when the temperature of the gas is above or below an acceptable range, which can serve as an early warning that alerts maintenance teams of issues in the digester process.

Help Me Choose A Flow Meter
Biogas plant with digester tank

Common Digester Gas Flow Meter Applications

Digester gas flow meters are used for mass flow measurement of the natural gas generated through anaerobic digestion in a variety of applications such as landfills and wastewater treatment processes.

  • Agriculture - digesters break down feed sources including
    • Livestock manure
    • Energy crops
    • Harvest remains
  • Municipal waste - digesters are used for:
    • Wastewater treatment facilities to turn waste (sewage sludge) into digester gas used in cogeneration
    • Yard trimmings
    • Landfills and municipal solid waste (MSW) - digesters to break down waste/trash into biogas/digester gas
    • Food waste from restaurants, cafeterias, and supermarkets
  • Industrial waste
    • Food/beverage processing
    • Pharmaceutical waste
    • Agro-processing residues
Digester tanks in an agricultural biogas plant

Gas-SelectX® and CAL-V™ Calibration for Superior Digester Gas Flow Meter Applications

The gas composition in a digester tank may change over time. Accurately measuring the digester gas flow when this happens would require normal gas flow meters to be sent back to the factory for recalibration to the new gas composition.

With the Fox Thermal Gas-SelectX® feature, the user can change the settings to match the new gas composition without returning the flow meter to the factory. The flow meter’s calibration then can be verified in the field using the calibration validation feature called CAL-V™ and a certificate can be produced to record the results of the CAL-V™ test to confirm the accuracy of the flow meter.

Model FT1 for digester gas flow measurement.

How to Get Digester Gas Flow Meters for Your Application

Our new app can help you choose the right gas flow meter model fast.

If you’re not sure which flow meter is right for your needs, our Help Me Choose app walks you through a short series of questions to help you choose the ideal meter.

Enter some basic details in the configurator form

Simply enter your digester process data and measurement requirements into our automated thermal mass flow meter configurator. Drop-down menus and Help icons will guide you to answer each question.

Save and submit your application data to us for a quote — it’s that easy!

Save the data you entered into the configurator to create a PDF with a model code and application ID. When you're ready, submit your application to the team at Fox Thermal for a quote.

Discover the Fox Thermal Advantage

Flow Meters for Digester Gas Applications

fox thermal product ft1

Model FT1

The FT1 is a cost-effective digester gas flow meter model that comes with both the Gas-SelectX® and CAL-V™ calibration validation features. These allow the gas composition settings to be changed and then verified in the field.

View Model FT1
fox thermal product ft4A meter

Model FT4A

The FT4A includes the Gas-SelectX® expanded gas selection menu and the CAL-V™ calibration validation feature. It is CE, FM, and FMc approved, along with ATEX and IECEx. Applications include wastewater treatment facilities and landfills.

View Model FT4A
fox thermal product ft4X meter

Model FT4X

The FT4X thermal mass flow meter measures digester gas flow rate/total and temperature. It comes with a BLM accuracy-compliant data logger which maintains a 7-year history. Includes the Gas-SelectX® & CAL-V™ calibration validation features.

View Model FT4X

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News & Innovation

Monitoring Digester Gas to Turn Emissions into Fuel or Carbon Credits

Utilizing methane emissions from digesters can provide significant energy, economic and environmental benefits.

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Flow Meter Comparison: Thermal Mass Flow Meters vs. Competing Technology

Choosing the best gas flow meter technology for accurately measuring gas flow from anaerobic digesters.

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Product Literature

Download Fox Thermal product data sheets, brochures, case studies, FAQs, and application guides for digester gas flow monitoring, biogas monitoring, environmental compliance, and much more.

Learn More

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