NTC Gas Controls from The West Group
Contact Us Our Links Page





Pneuchange was developed specifically for use with CO2 and other gas dependent incubators although it is now used in many other applications. Since it''s introduction it has become the unit of choice in thousands of laboratories world-wide. Pneuchange is recommended and supplied by most European incubator manufacturers and distributors and is compatible with all makes of incubator.


Pneuchange operates on a unique pneumatic logic principle requiring no electrical supply except for a battery to operate the change-over alarm. It can be placed anywhere in the gas supply line between the cylinder regulators and the incubator, either free sanding or fixed to a wall using the keyholes on the back of the unit. Inlet pressure gauges indicate the status of the gas cylinders and coloured indicators show which one is active. An outlet pressure regulator and gauge facilitate precise outlet pressure adjustment to the equipment. On depletion of a cylinder the unit automatically feeds from the alternative cylinder with no disruption of supply. Exhausted cylinders can be replaced at leisure. The unit requires no manual reset.


Inlet and outlet ports are 3/8”BSP threaded to accommodate a range of hose-tails to fit the supply tubing. Adaptors for other types of connection are also available.


How to order:


Model PC15 For outlet pressure range 0- 1 Bar.

Model PC30 For outlet pressure range 0-2 Bars.

Model PC60 For outlet pressure range 0-4 Bars

Model PC100 For outlet pressure range 0-6.7 Bars





Image 1

The Pneuchange Trio has three outlet ports into which OPMs ( Outlet Pressure Modules) can be plugged. These modules consist of a pressure regulator and gauge . Using these modules up to three separate incubators can be fed with gas at the same or different pressures.  Pneuchange Trio is supplied with one OPM . Additional OPMs can be purchased at the same time or later. OPMs are self sealing and on removal will completely isolate the incubator from the gas supply.



OPMs Outlet Pressure modules
Image 1

OPMs are available in the following ranges:

OPM 35          range 0-2 Bar

OPM 100       range 0-6.6 Bar

When ordering a PC Trio  please specify the OPM required.




Image 1

Chromachange was designed to meet the needs of Chromatographers requiring a reliable compact device for maintaining continuity of gas service to GCs ,ICPs and other critical gas dependent laboratory equipment.

Unlike large industrial change-over systems, Chromachange is self-contained , non-electrical and requires no manual reset. Gas is fed to the unit from cylinders fitted with reliable regulators ( also available from us ).   The gas supply changes when the  active cylinder empties and the output pressure falls to 70% of the original pressure.

The status of the feed cylinders is indicated on  inlet gauges and coloured indicators show which cylinder is currently active ( on-line). Chromachange is suitable for all inert gases ( not available for Hydrogen ). Fittings to suite all types and sizes of tube or pipework are available. A battery operated change-over  alarm is available as an  optional extra.

Image 1

This equipment is intended for Central Gas distribution and where Pneuchange or Chromachange units are inappropriate (e.g. for high pressure, high volume or high purity applications). The equipment incorporates cylinder wall brackets, changeover mechanism, outlet pressure relief valve etc. Gas is supplied from two banks of cylinders ranging from one to six cylinders per bank. Available in various forms for all types of gas including stainless steel units for very high purity and corrosive gases. Visual /audible remote change-over alarm panels are available as an option.  For further information please contact our  Technical-Sales personel.

For sales, prices and advice.........email us.



Website Builder - Freestart Premier Websites