# Allison Engineering: Process Control Solutions \& Industrial Instrumentation

> Specialist process control solutions, thermal mass flow meters, gas analysis, gas detection and industrial instrumentation for biogas, oil \& gas, wastewater, hydrogen and process industries\.

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## Pages
- [Form](https://allison.co.uk/form/)
- [Contact](https://allison.co.uk/contact/)
- [Process Control Applications](https://allison.co.uk/applications/)
- [Industries](https://allison.co.uk/industries/)
- [Wastewater Industry Process Solutions](https://allison.co.uk/industries/wastewater/)

## Applications
- [Gas\-to\-Grid Biomethane Upgrading using Oxygen Injection \& Control](https://allison.co.uk/application/gas-to-grid-upgrading-oxygen-injection-control/)
- [Flare Gas Metering Using Thermal Mass Flow Measurement](https://allison.co.uk/application/flare-gas-metering/)
- [Biogas Flare Gas Monitoring for AD Plants](https://allison.co.uk/application/biogas-flare-gas-monitoring-for-ad-plants/)
- [Biological Desulphurisation for AD Plants](https://allison.co.uk/application/biological-desulphurisation-for-ad-plants/)
- [VOC Monitoring for Biogas and Landfill Gas Applications](https://allison.co.uk/application/voc-monitoring-for-biogas-and-landfill-gas-applications/)

## Products
- [Awi2GO Portable Biogas Analyser](https://allison.co.uk/product/awi2go-portable-biogas-analyser/): A handheld multi\-gas analyser designed for fast, accurate biogas measurement across multiple sampling points and applications\. \<strong\>Measures up to six gases with ATEX certification, fast response times and a rugged IP67\-rated design for site use\.\</strong\>
- [ST51 Mass Flow Meter](https://allison.co.uk/product/st51-mass-flow-meter/): A versatile insertion thermal mass flow meter for biogas, natural gas and compressed air applications in pipes above 2"\.

\<strong\>Well suited to industrial gas duties, including dirty, wet and low\-pressure gas measurement\.\</strong\>
- [ST75V Mass Flow Meter](https://allison.co.uk/product/st75v-mass-flow-meter/): A compact inline thermal mass flow meter designed for low\-flow gas measurement in pipe sizes from ¼" to 1½"\.

\<strong\>Ideal for compressed air, natural gas, syngas and other smaller\-line gas applications\.\</strong\>
- [ST80 Mass Flow Meter](https://allison.co.uk/product/st80-mass-flow-meter/): A mid\-range insertion thermal mass flow meter designed for more demanding gas applications and elevated process temperatures\.

\<strong\>Fully programmable and suitable for pipe sizes from 3” to 36”, with live insertion and digital communication options\.\</strong\>
- [ST100A Mass Flow Meter](https://allison.co.uk/product/st100a-mass-flow-meter/): A high\-performance thermal mass flow meter for demanding industrial gas applications requiring advanced outputs, diagnostics and flexibility\.

\<strong\>Built for harsh process environments, including flare gas, fuel gas and complex industrial duties\.\</strong\>

## Categories
- [Chemical](https://allison.co.uk/category/chemical/)
- [Oil and Gas](https://allison.co.uk/category/oil-and-gas/)
- [Wastewater](https://allison.co.uk/category/wastewater/)
- [Hydrogen](https://allison.co.uk/category/hydrogen/)
- [Biogas](https://allison.co.uk/category/biogas/)

## Product categories
- [Thermal Mass Flow Meters](https://allison.co.uk/product-category/thermal-mass-flow-meters/)
- [Spray Shields](https://allison.co.uk/product-category/spray-shields/)
- [Flow Switches](https://allison.co.uk/product-category/flow-switches/)
- [Biogas Analysers](https://allison.co.uk/product-category/biogas-analysers/)
- [Flow Conditioners](https://allison.co.uk/product-category/flow-conditioners/)

## Optional
- [Sitemap index](https://allison.co.uk/sitemap_index.xml)