Prestcold claim that the machine has an except ional power to weight ratio, suffers very, little from vibration, is not affected by liquid pumping problems and is capable of starting under extreme condi t ions wi thout the need for crankcase heaters. They forsee i tsch~efusesbeing~na~r condi t ioning, heat pumps and general industrial and commercia l cool ing systems, Its pilot appl icat ions so far include refr igerat ion packs for British Rail's Advanced Passenger Train, a i r c o n d i t i o n l n g l n m o b i l e television studios and crane cab cool~ng

Denco Prestcold Ltd, Theale, Reading RG7 4AF, UK

Sound information An instruct ion manual for new

members of staff at an air cond i t ion ing company is being made general ly available. F.H Biddle hope that that their paper 'An in t roduchon to sound rn rooms' will be of use to students and apprent ices in the indust ry The manual is intended to gwe a basic knowledge to new members of staff rather than to be a comprehensive text book There is some more technical informat ion included where it is felt to be essential to the understanding of the sub jec t The subject covered is the appl icahon of noise data for unitary equipment (eg fan assisted convectors, fan-coil units) installed in a r oom

F.H. Biddle Ltd, Newtown Road, Nuneaton, Warwickshire CVl 1 4HP, UK

Floor level refrigera- tors

A range of refr igerators has been designed with hot cl imates in mind. Foster Refrigerator's Gastronorm range includes cabinets with bot tom-mounted units which should operate more eff ic ient ly in hot kitchens where the f loor level temperature m a y b e 8 ° C tess than the ceil ing tempera tu re

One of Fostersran.qeofGastronorm refrigerator':

All the cabinets have self c losing doors so that the contents cannot be inadver tently left unprotected for long periods of time. They are available with doors on both sides for ~nstallation between a kitchen and a service area.

The cabinets are rntended for the storage of dairy produce. meat, fish, frozen food and also w~nes and bakery products, and have capac~bes from 0.48 m a to 2.8 m :~

Foster Refrigerator (UK) Ltd, Oldmedow Road, King's Lynn, Norfolk PE30 4JU, UK

Thermometers Digital thermometers coverrng

temperature ranges between - 1 5 0 ° C a n d 1 750°C have just been introduced by Channel Electronics. The twelve thermometers in the 8 000 series are calibrated to the appropr iate British Standards but are also suppl ied to meet DIN, NBS and N F specif ications. They use a current of less than 45 mA and the manufacturers claim that the modular circuit design and purpose-made MOS/LS I chip ensure long term reliability. A th ree posibon switch has a 'momentary on' mode as well as the normal 'on' and 'off' posit~ons. Channel claim thatHP7 bat teneswi l l thus last for over twelve hours

of conbnual rise, and that manganese alkaline cells will run for 45 hours cont inuous ly or for 1 O0 hours of interm,ttent use.

The ~nstruments have three or four digit, seven segment, LED readouts. A battery recharge, ~s avai lable

Channel Electronics (Sussex) Ltd, PO Box 58, Seaford BN25 3JB, Sussex, UK

Portable air cooler An a~r cool ing unit designed

to solve problems of jofnting cables in hot or humid atmospheres is being used for cool ing tents and manholes ~r-, hot c l imates The unit, Moleair. is manufactured by Denco Miller. To fu!fil its onginai speci f icahon, Jt had to be small and portable and able to operate from the service vehicles' own power supply. It ~s rated at i kW and, cool ing from an ambient temperature of 46°C to 24°C. takes a full load current of TAat 1 1 0 V

The units consists of two housings attached by cl~ps, The larger housing contains the condens~ng unft and the smaller one contains the evaporatorun~t with the fan speed and on-off control, the return air gril le and fi lter and the discharge dif fuser

Several units have now been sold to the original client, and Denco Mil ler are hoping to expand their sales

Denco Miller Ltd, Denco Works, Whitworth Road, Bitterne Park, Southampton SO9 lW5, UK

D.rm~:o M,Ih', s portable a~r coohng un~i

122 I n ternatbonatJournalo i Refrgerat~on