PHOENIX PRECISION INSTRUMENT CO. - Analytical Chemistry (ACS

May 16, 2012 - PHOENIX PRECISION INSTRUMENT CO. Anal. Chem. , 1957, 29 (6), pp 86A–86A. DOI: 10.1021/ac60126a800. Publication Date: June 1957. ACS L...
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NEW PRODUCTS

Fastest Voltage Regulator Available THE CURTISS-WRIGHT LINE REGULATOR Simultaneous recordings of response to step change in 6 0 cps voilage.

The Curtiss-Wright Model E E 100 Distortion Elimi­ nating Voltage Regulator provides faster recovery time than any other regulator on the market—less than l/50th cycle, or 330 microseconds. I t also reduces typical power line distortion to less than 0.3%. Ca­ pacity is 1.4 KVA. Now being installed in a rapidly growing number of laboratories and production test departments, it provides simpler, more accurate calibration of meters, better design of transformers, synchros and motors . . . easier testing with fewer rejects, more accurate meas­ urement of magnetic properties and receiver sensi­ tivity . . . better a.c. computer performance, elimina­ tion of fast line transient effects. Write for details.

Typical electromechanical regulator output. Recovery time over 4 seconds.

Electronic Component & Instrument Sales Department ELECTRONICS

DIVISION

CURTISS-WRIGHT CORPORATION



C Λ « l · S Τ A 0 T,

N.

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Curliss-Wright DEVR output. Full recovery 330 microsec­ onds.

I.

Far further information, circle number 86 A-1 on Readers' Service Card, page 77 A

NOW . . . an automatic, recording CHROMATOGRAPHIC REFRACTOMETER

that cuts research work

up to 7 5 % N o l o n g e r is it necessary f o r y o u t o p e r f o r m a l l t h e t i m e - c o n s u m i n g w o r k associated w i t h chromatographic analysis. This differential r e f r a c t o m e t e r does a l l t h e w o r k — r e l i a b l y — accurately. Simply start the test, a n d the a n a l y s i s is m a d e a u t o m a t i c a l l y — u n a t t e n d e d . The f i n a l p r o d u c t . . . a n a c c u r a t e , p e r m a n e n t r e c o r d i n g of t h e results . . . a r e c o r d y o u can e x a m i n e i m m e d i a t e l y or file for f u t u r e use. O p e r a t i o n is so s i m p l e t h a t e v e n y o u r most i n e x p e r i e n c e d p e r s o n n e l c a n p e r f o r m critical analyses w i t h ease. What's m o r e , w h e r e g r e a t differentials a r e encountered the exclusive P h o e n i x r a n g e - e x t e n s i o n system p e r m i t s set­ t i n g t h e i n d i c a t o r o n scale w i t h o u t t h e a n ­ n o y a n c e of c h a n g i n g cells . . . w i t h o u t u p s e t t i n g t h e z e r o c a l i b r a t i o n . . . a n d w i t h o u t loss of s e n s i t i v i t y or accuracy. A single d i a l a d j u s t ­ m e n t is a l l t h a t ' s r e q u i r e d . SEND FOR BULLETIN R - 1 0 0 0 . N o For y o u r c o n v e n i e n c e , just a t t a c h y o u r l e t t e r h e a d — or w r i t e :

PHOENIX

PPI

3805

N.

PRECISION 5th STREET.

obligation. this a d to

INSTRUMENT

PHILADELPHIA

40,

For further information, circle number 86 A-2 on Readers' Service Card, page 77 A

86 A

·

ANALYTICAL

CHEMISTRY

All-Purpose Drive Unit T h e Chemical & Pharmaceutical I n d u s t r y Co., Inc. is introducing a new laboratory unit, called t h e Erweka. I t is an all-purpose drive unit, which, with various a t t a c h m e n t s , serves as m a n y different machines. Numbering 14 in all, the a t t a c h m e n t s which are available include: a three-roller mill, a homogenizer, an agitator, a ball mill, a tablet coater, a n d others. T h e E r w e k a is said to be practical in operation with no mechanical skill re­ quired t o change from one type of a t t a c h m e n t to another. Occasional lubrication of the motor drive and regular cleaning are all the maintenance the E r w e k a requires, says t h e company. 9 Apparatus for High Frequency Measurement T h e Sargent-Jensen high frequency t i t r a t o r is now available from Ε . Η . Sargent & Co. This instrument was designed in collaboration with D r . F . W. Jensen for the high frequency measure­ m e n t of conductance and dielectric con­ stant. I t s primary use is with aqueous or semi-aqueous solutions of electro­ lytes, particularly as an indicator of the course of titration reactions for end point determination. I n t h e absence of physical or electrical contact between instrument and solution under measure­ ment, problems involved with use of low frequency conductance measure­ m e n t are avoided, says the company. A high level of sensitivity is provided also, adds Sargent. 10 N e w Ovens Feature Heating Uniformity A new line of ovens is offered by the Precision Scientific Co.—Models 16 and 17 Thelco ovens and Model 18 Thelco mechanical convection oven. T h e first two models have a tempera­ ture range to 200° C , with an over-all uniformity of ± 1.4 to ± 1.7 ° C. through­ o u t t h e range. According t o the com­ pany, the performance characteristics of these ovens are made possible by gravity convection heat transfer utilizing selected and efficiently placed com­ ponents. Outstanding feature of the low cost Model 18 is heat-up time of 40 minutes to its m a x i m u m temperature of 200° C. Other features include: recovery time of 25 minutes, t h e r m o s t a t sensitivity of ± 0 . 2 5 ° C , and temperature uniformity throughout t h e chamber of ± 1 . 1 ° C. a t 200°C. Π

CO. PA.

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For further information, see coupon oti page 77 A