Did you know?

When using any infrared technology for gas measurement other gases with a similar wavelength can show an increased CO2 value.  There are no gases, or volumes of such gases, typically seen on our current applications which could cause such a cross gas effect.  CO2 does occur naturally in air at approx. 400ppm, because of this you cannot zero calibrate the CO2 value on Geotech analysers as this would cause a negative offset.

CO2 monitoring for Pfizer

How the company uses the G100 Pfizer uses Geotech’s G100 portable CO2 analyser to quality check their 25 medical incubators to ensure that the CO2 environments are as required. The incubators, kept at 37 degrees Celsius and five percent carbon dioxide (CO2), are manufacturer-fitted to regulate themselves and display their environments. Using the G100 to…
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CO2 monitoring for Kerry Foods

How the company operates The Kerry Foods plant processes food ingredients, such as fruit conserves and confectionery sauces, which are stored and distributed in 2000 tanks. Each tank is monitored regularly for patterns of CO2 build-up.  Although CO2 levels may rise to above 1% with some foods, such as strawberry or peach, higher levels can…
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An analyser is only as accurate at the moment of calibration.  Following this point, infrared benches can drift over time.  However alongside ensuring regular servicing, we recommend you perform regular user calibrations and checks. By using span gases similar in composition to your typical CO2 values, the accuracy of the CO2 channel can not only be maintained, but can be improved for your specific application.

Other gases


Methane is 20 times more of a potent greenhouse gas than CO2. The anaerobic process has been replicated artificially in the form of anaerobic digesters to produce cleaner energy to power houses and even cars. Through monitoring with a Geotech analyser you can optimise your process to ensure you make the most from your plant as well ensuring that your engines aren’t damaged if CH4 drops below optimal levels.

Carbon Dioxide

Carbon dioxide is critical to maintain at a constant level during IVF and cell culture growths. It’s also a bi-product of respiration and in confined spaces these levels can increase. Careful analysis of CO2 within an IVF chamber using a Geotech analyser can ensure that embryos develop correctly. The detection of CO2 in confined spaces e.g. a lorry can be indicative of a stowaway.


Oxygen is required in the combustion process where CH4 is burnt to produce heat and energy but too much can cause damage to the engine. Pinking occurs when too much oxygen is present in the engine during combustion. Continuous analysis with a Geotech analyser allows you to set alarms when thresholds of O2 are passed which in turn can close down the engine saving expensive damage and increased downtime.

Carbon Monoxide

Carbon Monoxide is produced during incomplete combustion, this occurs when there is limited levels of oxygen and increased Carbon Dioxide. Levels of 90ppm or greater can be indicative of underground fires on a landfill site. Geotech offers unique technology to gain accurate results about the health of your landfill site and to ensure the safety as well as value of the cell is retained.

Hydrogen Sulphide

Hydrogen sulphide is particularly harmful when biogas is used in internal combustion engines. Its chemical reactions and those of its combustion product - sulphur dioxide - lead to corrosion and wear on engines. Through careful monitoring of this using a Geotech analyser you can ensure the health of your engine and save costs through engine downtime or increased servicing.


Electrochemical sensors are used industry wide, they are micro fuel cells designed to provide an accurate, stable and low cost measurement technique that can be easily maintained in a portable analyser.


Ammonia is one of the digestion products in anaerobic digestion. If nitrogen-rich feedstocks are used, inhibition by ammonia is often the reason for a process imbalance. Therefore, monitoring NH3 concentrations in the digester helps to estimate if ammonia inhibition is causing the process imbalance.

Nitrous Oxide

Nitrous oxide is widely used in hospitals as a general anesthetic. It’s important that concentrations are accurately measured and also leaks and exposure levels are monitored closely, as long term and repeated exposure can be harmful to human health.