Global leaders in gas analysis technology, Geotech`s analysers are synonymous with quality, reliability and accuracy. Our ATEX certified portable and fixed gas analysers are used in biogas plants and landfill sites throughout the world. We also support the embryology industry with our well-know and respected G100 CO2 analyser for incubator gas monitoring. We are committed to customer service and full technical and product support; many of our 60 strong distributor network offer local equipment servicing to Geotech`s own high standards.

Company details

Sovereign House, Queensway , Leamington Spa , Warwickshire CV31 3JR United Kingdom

Locations Served

Our Distributors

Our Manufacturers

Business Type:
Industry Type:
Monitoring and Testing - Environmental Monitoring
Market Focus:
Globally (various continents)

Steve Billingham, Managing Director, Geotech UK

Geotech is a global leader in the design and manufacture of gas analysis technology. A QED environmental company and part of the US public company Graco Inc with a turnover exceeding $1.2BN and 3600 employees worldwide. Geotech’s unrivalled investment in R&D, matched by our unswerving commitment to customer service and support ensures we are the supplier of choice for our customers, to ensure operational efficiencies and protect capital equipment. Around the world, Geotech gas analysers have become the de-facto standard for quality, reliability and accuracy. With a vast network of approved international distributors and accredited service partners, Geotech is able to supply and support its customers in over 60 countries throughout the world.

Geotech gas analysers are used in a wide range of industries worldwide. With a vast network of established international distributors, Geotech is able to supply to and support its customers in over 60 countries throughout the world.  Additionally, Geotech’s distributors can also offer comprehensive technical and product support as well as local equipment servicing based on Geotech’s high standards.

Beyond its market leading gas analysers for landfills and the biogas sector, Geotech also designs, manufactures and supplies a full range of environmental monitoring equipment.  These include groundwater sampling and monitoring instruments, pneumatic pumps for leachate control and remediation processes, as well as CO2 monitors and N2O monitors for the laboratory and medical industries.

Geotech offers a total support package to all its customers for all of its products. Its in-house dedicated and experienced technical support, service and sales teams offer on-site demonstrations, field trials and product training, post-sale servicing of equipment and ongoing technical support.


The equipment manufactured at Geotech is made to the highest quality, adhering to a wide range of industry standards.  This provides our customers with complete reliability and peace of mind.  Geotech has achieved and led the market in the following industry certifications;

  • ISO17025 Calibration
  • ATEX certification on portable gas analysers
  • MCERTS accreditation on the GA5000, GEM5000 and BIOGAS 5000.

Geotech is a trusted manufacturer and supplier of portable and fixed gas analysers.

Quality, reliability and accuracy in environmental monitoring.

Environmental monitoring is extremely important in providing the short and long-term indicators of ecosystem health.

To do this effectively, the process should be undertaken for the long term due to the complex, sensitive and slow-changing nature of the environment.  By measuring physical, chemical, and biological variables over time, organisations can evaluate the health of natural resources and make informed management decisions based on scientific data.

As a leading innovator, manufacturer and supplier of portable and fixed landfill gas analysers and biogas analysers, we understand the importance of having the best tools and equipment to ensure accurate assessment and analysis in the environmental monitoring process.

As a result, Geotech’s gas analysers are the trusted equipment in nearly 50 per cent of all anaerobic digestion sites in the UK.  More than that, Geotech gas analysers have also become the standard-bearer for quality around the world for the past four decades.

The considerable investment we put into the design and manufacture of our gas analysers is matched by an unswerving commitment to customer service and support.  Our customer support teams build intimate and lasting relationships with clients based on mutual trust, understanding and respect.

Our customer and technical support team are here to make your Geotech experience as smooth as possible.

With over 100 years combined working experience, our aim is to support you from initial enquiry through receipt of your order, to providing after sales support, assistance and professional advice in the many years to come.  Simply put, our team will look after you and ensure that you continue to receive the assistance that you expect when you choose Geotech.

The range of services includes;

  • Advice – application advice, best practice, choosing a product
  • Training – webinars, face to face, skype
  • Troubleshooting – best practice, remote support, getting you up and running
  • Sharing best practice – webinars, training, case studies
  • Scheduling routine service – assisting with service process, arranging dates to suit your needs, hire of products
  • Site visits – installation of product, training, investigation
  • Webinars – we offer a wide range of webinars throughout each year and can tailor these to suit your business's needs

Geotech has been certified as operating a quality management system in compliance with the requirements of ISO 9001:2008 for the following scope: The quality management system for the design, manufacture, installation, maintenance, service, hire and recalibration of analytical equipment for use in environmental monitoring.
ISO is an independent, non-governmental international organisation with a membership of 162 national standards bodies. Through its members, it brings together experts to share knowledge and develop voluntary, consensus-based, market relevant International Standards that support innovation and provide solutions to global challenges.
Products: GA5000, GEM5000, BIOGAS 5000

Geotech has achieved UKAS ISO17025 accreditation for its calibration lab for its full range of landfill and biogas analysers.

By controlling this process, it gives users the most comprehensive externally audited and verified performance endorsement available for a manufacturer of portable gas analyser calibration.
Products: GA5000, GEM5000, BIOGAS 5000

ATEX is the name commonly given to the legal requirements for controlling explosive atmospheres and the suitability of equipment and protective systems used in them.

If you manufacture electrical equipment used in hazardous locations and intend to market your products in the European Union, your equipment must comply with the ATEX directive. Also known as European Directive 94/9/EC, the ATEX directive ensures the free movement of goods throughout the European Union by harmonizing compliance procedures.
Products: GA3000 Plus, GA5000, GEM5000, BIOGAS 5000, Dipmeter, ATEX Dipmeter, Interface Meter

Through independent testing, our portable analysers meet CSA certification recognised across North America

COUNTRIES: Canada, Global, USA
Meeting this certification grants the CSA mark to be labelled on our analysers which is widely recognised and accepted by safety experts and our distributor. It confirms that it has been tested and has met the applicable standards for safety & performance as outlined by regulatory bodies ANSI, UL, CSA, NSF and more.
Products: GA5000, GEM5000, BIOGAS 5000

Being IECEx compliant, Geotech manufactures portable analysers to a global standard, ensuring high performance and safety to our customers

IECEx is internationally recognised certification, globally accepted as a mark of performance and meeting high safety standards. It is based on a number of International Standards associated with explosive atmospheres, which gives our customers and distributor network the upmost confidence in the analyser.
Products: GA5000, GEM5000, BIOGAS 5000

MCERTS is the Environment Agency of England & Wales (EA) Monitoring Certification Scheme. It gives confirmation of performance of equipment to the demanding MCERTS standards which assists end users in demonstrating full compliance.

MCERTS provides the framework for businesses to meet quality requirements. Compliance with MCERTS gives the EA confidence in the monitoring of emissions to the environment. A key part of MCERTS is accrediting monitoring equipment and loggers used in environmental monitoring applications, although they may be invalidated if not used in line with the exact processes used when tested.
Products: GA5000, GEM5000, BIOGAS 5000

Conflict Minerals Policy

Geotechnical Instruments (UK) Ltd is committed to complying with the Dodd-Frank Wall Street Reform and Consumer Protection Act 2010, by requiring our supplier to disclose whether any minerals contained within the products they provide Geotech has, originated in the Democratic Republic of the Congo or an adjoining country and, if so, to provide a report describing the measures taken to exercise due diligence on the source and chain of custody of those minerals.

Conflict minerals are minerals mined in conditions of armed conflict and human rights abuses, and which are sold or traded by armed groups. This has for some years been a particular problem in the DRC. The DRC’s mineral wealth is enormous. It is estimated that the country contains between 65-80% of the world’s columbite-tantalite (coltan) reserves, 49% of its cobalt reserves, and 3% of its copper reserves. Gold and diamond deposits remain under explored. Industrial Diamond reserves are estimated at 25% of world reserves.

Products: Skimmers, Oil Water Separator, Interface Meter, Bladder Pump/Micropurge, Dipperlog, ATEX Dipmeter, Dipmeter, AP4+ Pump, AP3 Pump, AP2 Pump, G210, G150, G200, G110, G100, BIOGAS 300, GA5000, GEM5000, GA3000 Plus, BIOGAS 5000



Geotech is the market leading supplier of anaerobic digestion gas monitoring equipment in the UK. We supply portable and fixed gas monitoring solutions for AD operations throughout the world.



Groundwater is an important resource, so having accurate instruments for water quality monitoring is vital. Geotech supplies a range of instruments for groundwater monitoring and sampling.



Geotech has developed equipment for each stage of the remediation process, from identifying contamination to gas leak detection and the treatment of contaminated liquid.



Our portable CO2 monitors are used in a variety of applications.  Also measuring O2, temperature and humidity, they are versatile instruments for laboratories worldwide.



Verification of piped medical gases (N2O and O2) can be achieved with Geotech's G210 portable N2O analyser, and our G200 can be used for monitoring background levels of anaesthetic gases.