InstrumentstestingSensorsGasses and vapoursConsultancy

 

About Versaperm

Versaperm manufactures gas permeability testing equipment, offers a comprehensive permeability testing service and a materials consultancy. These are used to measure gas permeability and leakage, important in medical and pharmaceutical packaging, foils and films, coatings, food and confectionery packaging and contents, and many other applications.

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Instruments

Versaperm designs and manufactures instruments to meet each customer’s needs. Instruments are typically be based on a modular MkVI design.

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Testing Service

Our laboratory testing service has over 30 years experience to enable us to choose the best technique to measure your sample's permeability both quickly and accurately.

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Universal Sensors

Water Vapour Sensors

Helium Sensors

Hydrogen Sensors

Hydrocarbon Sensors

Solvent Sensors

Oxygen Sensors

Carbon Dioxide Sensors

Gasses/vapours

Applications

Permeability is often the most critial factor in a material or component's performance. It determines how drugs to loose potency, food goes off, how paper both prints and jams in equipment, how seals work and it can even cause electronics to fail.

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Consultancy

Our Consultancy division combines our theoretical and practical Permeability skills in instrument design and manufacture. Permeability Consultancy

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Semiconductor Gas Sensors

Semiconductor gas sensors are based around a metal oxide, normally SnO2.  When a metal oxide crystal is heated to a certain high temperature, specific elemental molecules are adsorbed by the crystal surface with a negative charge.  The sensor can be sensitised to different gases by the choice of operating temperature, microstructural modification and the use of dopants and catalysts.

The donor electrons from the surface of the crystal are transferred to the adsorbed oxygen, leaving positive charges in a space charge layer and creating a potential barrier against electron flow. In the presence of a deoxidizing gas, the surface density of the negatively charged oxygen decreases, decreasing the barrier height in the grain boundary.

Semiconductor gas materials


New nanostructure materials are boosting the performance and sensitivity of semiconductor gas sensors due to their much higher surface-to-bulk ratio.

 

 

 

Versaperm Limited
10 Rawcliffe House, Howarth Road, Maidenhead, Berkshire, SL6 1AP, UK, Tel: +44 1628 777668
e.mail: webcontact@versaperm.com
© Versaperm Limited 2010
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