In 1973 NTC services introduced their first automatic gas cylinder change-over unit for use with CO2 incubators in Tissue Culture, IVF and Microbiology laboratories. Since that date our PNEUCHANGE units have become the best selling gas bottle change-over equipment for these applications. This equipment is recommended and sold by most of Europe's incubator manufacturers as a result of which there are currently in excess of ten thousand of these units in round-the-clock use. NTC has become a major player in the gas control and handling market and now presents its latest brochure of products all of which are manufactured to the highest quality standards are unreservedly guaranteed for 12 months. Our range of gas control equipment can be used by a Chemist, Biochemist,Physicist, Biologist, Biotechnologist, Microbiologist, Embryologist, Pathologist or Engineer this brochure will be of interest.