Vacuum News

operation rn most soluttons at temperature of up to 1Oo’C. The unit was extensively tested under actual working conditions for over two years before being released for commercial use. AvaIlable in a range of power outputs from 1.5-6 kW and fully guaranteed for 12 months.

‘Polaris’ heating efftciency is based on convection and the design allows free flow of solution through the outer casing and directly over the heating elements. Uniform heating of the tank solution is therefore achieved rapidly.

A further innovative feature is the incorporation of a ‘safe level’ indicator as a visual warning to operators against minimum tank solution levels. A built-in prevention against overheating is fitted which disconnects the heater from the power supply.

Considerable attention has been given to safety in the design of the ‘Polaris’ and as a result, the heater is equipped with a positive safety earth. An insulation test of 10 kV is applied to all ‘Polaris’ heaters.

This is much in excess of that called for on American tests for immersion heaters as required by Underwriters Laboratories lncorDorated USA.

The lmpervio ‘Polaris’ IS extremely compact enabling it to be fitted behind anode baskets and in other confined areas. lnsfallation is now made easy by means of new fitted non-corrodable adjustable hanging brackets.

Since being made generally available, the ‘Polaris’ has been well received by a wide range of user. A few of the most interesting are: micro and printed circuit board manufacturers; beverage producers- (no fouling problems); original equipment for electroless plating plants; heating acid solutions to polish crystal glass; precious metal depositing and recovery.

Sales of ‘Polaris’ in the Export Market are as successful as the Home Trade and Braude are endeavouring to appoint reputable Companies in various overseas territories to act as distributors and stockists. The compact design makes ‘Polaris’ extremely suitable for overseas airfreight and distributors’ stocking arrangements.

E. Braude. (Corrosion Control) Limited, Sandhurst. Surrey, UK

1981 Alaskan expedition chooses Jenway

It has been announced that the Peak District Alaskan Exhibition 1981, which will be carrymg out ecological studies in Alaska from mid-May to June this year, will take with them digital pH meters and thermometers manufactured by Jenway.

The prmcipal task of the expedition is the collection of algae samples for later analysis In the UK, photographically recording the area’s flora and fauna, and the making of transects in the vicinity of the glacier snout. The latter involves the examination of plant life within areas of one square meter, at 100 m intervals, in a direct line away from the glacier. By this means, an indication can be obtained of the order in which plants colonize after glacial recession. The Jenway instruments will be used specifically in the making of the transects.

The instruments to be taken by the expedition include a Jenway Model 8001 digital thermometer, which has an operational range from -75 to +999”C and a resolution of 1 .o”C, and a Model 6081 digital pH meter with a 0.01 pH resolution. Both have fully automatic cold junction compensation, and the Model 6081 pH meter has a dual role with the capability to provide accurate temperature measurement over the range -30 to +15o”C.

Jenway Ltd. Grasmore Green, Felsted, Dunmow, Essex, CM6 3LB. UK

New literature Catalogues and technical leaflets from manufacturers creating suction in the same way as a vacuum cleaner. Blowing is

Vakuum information 70. Ausgabe (in German). better for heavy materials such as cement dust where higher

VEB Hochvakuum. Dresden 8020. DOR volumes are required while suction is more suitable for higher or

‘Supavac’ Fast scanning Faraday quadrupole mass spectrometer, more toxic materials.

‘Anavac’ Residual gas analyser/leak detector, ‘Petra’ Personnel and environmental trace-gas analyser.

VG Gas Analysis Ltd. Bivac products featured in the new leaflets include:

Nat Lane, Winsford, Cheshire, CW7 3QM. UK Bulk handling vehicles: tankers, tippers and long mounted suction units for conveying powders, grains and granules.

‘Services for universities and research establishments’ TecQuipment Consultants Ltd. Mobile heavy duty vacuum units for removing such materials as

Hooton Street, Carlton Road, Nottingham, NG3 2NJ. UK foundry sands from casting operations areas to a central collection point for later re-use or for cleaning the flues of large central

‘Leak detectors’ heating boilers without closing them down.

Edwards High Vacuum, Manor Royal, Crawley, West Sussex, RMlO 2LW. UK s UC /on equipment to remove airborne dust and swarf immediately it t’

is formed around machine tools.

All systems go with suck and blow

The Bivac Division of DD Lamson has brought out a new series of product leaflets on its range of equipment for the pneumatic handling of powders, grains, granules, pastes and slurries.

Multi-stage turbo blowers and exhausters providing the motive power for pneumatic handling and centralized vacuum cleaning systems.

Pinch valves which control the flow of pneumatically impelled In contrast to mechanical handling, pneumatic pressure is relatively materials applying pressure to a flexible sleeve. simple in operation and highly effective. It requires either a turbo DD Lamson, blower to blow the material along a pipeline or a turbo exhauster Harbour Road, Gosport. Hants PO1 2 1 BG. UK

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