NEW PRODUCTS •Pat. App'd. for
LOURDES
Super-Speed
REFRIGERATED CENTRIFUGE it
Push button Electro-Dynamic Braking
E a c h step of a chemical analysis— measuring, mixing, purifying, processing, comparing, and recording—is done automatically. I n t e g r a t e d into a continuous flow system, the analyzer provides accurate, dependable analysis with precise reproducibility, according to t h e company. I n t h e laboratory, the unit can run 20, 40, or 60 tests per hour without h u m a n supervision. Systems are available for single or multiple component determinations. They are currently being used for analyzing levels of concentration of such materials as cyanides, sulfur dioxide, silica, phosphates, iron, chlorides, copper, sulfates, ammonia, sugars and aluminum. P-14 Liquid C h e m i c a l F e e d e r
(smooth stopping)
Model LRA
Shown set up for continuousflowoperation (Cover normally closed)
it
Accommodation for n e w continuous
it
Automatic unbalance Electrical Safety
flow system*
trip it
The model LRA is the first automatic refrig erated centrifuge of its kind. Like the nonautomatic Model LR, it has the newest and most efficient refrigeration design ever intro duced. By proper placement of cutouts, baffles and deflection plates, a smooth forced air cir culation system is set up. The warm air com ing off the rotor flows around large surface area cooling coils on the side and bottom of the chamber. Upon emergence in the cooled form, the air flows onto all portions of the rotor. This system permits the cooling of any Lourdes' rotor from ambient to 0°C -within ten minutes by spinning at slow speed. Rotor ; temperatures are easily maintained at 0°C sand lower during fulf speed extended runs, and as low as — Ι δ ' Ό at lesser speeds or for shorter runs. By merely throwing a toggle switch, a 1 Hp. motor automatically accelerates any rotor to a pre-set speed. Lourdes' electrodynamic push button braking system provides for smooth rotor stopping in a fraction of unbraked stop ping time. A time delay relay releases the braking action at slow speed and permits the rotor to stop naturally without disturbing the sediment. This same centrifuge is now avail able with a YÎ Hp. motor drive {Model LRA-1) to provide higher speed and force with the smaller rotors. Each centrifuge comes adapted to accommodate the new Lourde.s' continuous flow system at no additional cost. The continuous flow rotors with polyethylene liners, in addition to ease of operation, assembly and disassembly, also offer fast flow rate, high speed and force and greater collection capacity than, any comparable continuous flow centrifuge. New time saving applications for these rotors are being discovered daily. Every Lourdes' instrument is guaranteed for a period of one year and this guarantee insures customer satisfaction. .
Accommodates n e w 3 liter capacity rotor ( 1 0 , 0 0 0 X G)
it
All
Lourdes'
rotors
directly
inter-
changeable it
Unsurpassed refrigeration efficiency"
•fa Electric tachometer and synchronous timer it
Complete safety controls
Write for New General Catalog refer to
AC49
Catalog includes: • Refrigerated centrifuges* • Non-Refrigerated centrifuges • Automatic Centrifuges • Non Automatic centrifuges • Continuous flow centrifuges* • Rotor and accessories • Multimixer—All purose homogenizer • Volumixer—Large capacity homogenizer Sole distributor in Canada Canadian Laboratory Supplies Ltd. also Nationwide U.S.A. Dealerships
L O U R D E S Instrument Corp. BROOKLYN 32. NEW YORK
Circle No. 75 on Readers' Service Card 86 A
·
ANALYTICAL CHEMISTRY
and a porous stone for feeding the liquid chemical. The unit is designed for use with hypochlorite solutions, defoaming agents, inhibiting agents, and similar liquids. The company points out t h a t the liquid chemical m u s t be free of suspended solids and should be sufficiently t r a n s p a r e n t so t h a t t h e scale m a y be seen. P-15 R e f r a c t i v e Index Process A n a l y z e r
LARGEST MANUFACTURER OF SUPER-SPEED CENTRIFUGES. ESTABLISHED 1944
53rd STREET & 1st AVENUE.
A liquid chemical feeder for metering, regulating, and feeding liquid chemicals continuously at low flow rates—from 0.1 to 4.0 gal. per day— into a liquid stream has been announced by Fischer & Porter Co. T h e semiautomatic Micro-Η features a built-in ejector, corrosion-resistant plastic body,
A process analyzer based on t h e de tection of refractive index differences between a process stream and a de sired sample is announced b y Phoenix Precision I n s t r u m e n t Co. T h e instru-
