PHOTOVOLT CORPORATION

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DISTILLΑΤΙON

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,

,

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exclusives! ï ï m S : S i ')*'·:••

equipment for improving COLUMN PERFORMANCE and CONTROL 1. LARGE SIZE REDISTRIBUTOR: (now built in sizes up to 90") Collects and distributes liquid evenly over the packing, minimizes channeling and keeps packing wet and at maximum efficiency at all liquid rates. Especially suitable for vacuum distillation. Can be used with all types of packing and readily installed in any installation.

2. AUTOMATIC REFLUX HEAD: Explosion proof, electrically operated for high vacuum, pressure and temperature and for corrosive and hazardous service. Designed to handle both vapor and reflux at the top of distillation columns. Eliminate reflux control problems with its simple, accurate and dependable operation.

3.AUTOMATIC REFLUX SPLITTER: Similar to item # 2 but designed for handling reflux only. Available as standard units with capacities up to 30U0 gals, per hour. Larger and steam-jacketed units also available. The above items are available in most materials of construction and in sizes 2 " and larger.

ALSO AVAILABLE: Packing support plates, distributor plates, stills, columns, and complete distillation plants.

DISTILLATION

FURTHER INFORMATION AVAILABLE ON REQUEST

ENGINEERING COMPANY

All

items

above

are

patented.

1 0 8 DORSA AVENUE, LIVINGSTON, N. J.

Circle No. 22 on Readers' Service Card

PHOTOVOLT

Electronic

pH

METERS «*Β

A complete line ot pH meters Incorporating modern electronic tubes and circuits, simple in operation and maintenance, featuring sealed amplifier plug-in units. Line-Operated Model 85 • •

S i n g l e r a n g e 0 - 1 4 , scale l e n g t h 3 " , r e a d a b l e t o 0.1 p H « n i t . Fully s t a b i l i z e d , s i m p l e , c o m p a c t , a v a i l a b l e w i t h c a r r y i n g case,

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A full-fledged p H meter usable w i t h a l l types of electrodes.

Write for Bulletin # 1 9 5

$115.—

Line-Operated Model 115 • S i n g l e r a n g e 0 - 1 4 , scale l e n g t h 4 " , r e a d a b l e t o 0.05 p H u n i t . · • T e m p e r a t u r e c o n t r o l 2 0 - 6 0 ° C , a v a i l a b l e w i t h c a r r y i n g case. • A d d i t i o n a l m i l l i v o l t scale f o r r e d o x measurements a n d t i t r a t i o n s . Write for Bulletin # 2 2 5 $145.

MODEL 110

Line-Operated Model 110 MODEL 85

• S i n g l e r a n g e 0 - 1 4 , scale l e n g t h 7 " , r e a d a b l e t o 0 . 0 2 p H u n i t . • T e m p e r a t u r e c o n t r o l 0 - 1 0 0 ° C , v o l t a g e selector f o r 8 0 - 2 6 0 volts. •

A v a i l a b l e w i t h c a r r y i n g cover 8. b a s e b o a r d f o r b o t t l e s , b e a k e r s .

Write for Bulletin #105 Battery-Opera ted Model 125

$215.—

• S i n g l e r a n g e 0 - 1 4 , scale l e n g t h S ' A " , r e a d a b l e t o 0.03 p H u n i t . • O n l y 3 b a t t e r i e s , s t a n d a r d r a d i o t y p e , 2 , 0 0 0 hours o f service. • A v a i l a b l e with carrying f r a m e f o r i n s t r u m e n t / b e a k e r s , bottles.

Write for Bulletin #118

$175.

MODEL 125

A l l prices include set of glass electrode οnd calomel electrode, or combination grasiTand-calomef electrode IprôbeJ,

See also Bulletin # 738 on pH Meter Tester Mod. 25 for checking the performance of pH meters without electrodes or buffers, applicable to pH meters of any make. $ 5 8 . MODEL 115

PHOTOVOLT

C O R P O R A T I O N 95 M A D I S O N AVENUE, N. Y. 16, Ν. Υ.

Circle Nos. 40-1, 40-2, 40-3, 40-4, 40-5 on Readers' Service Card VOL.

51, NO. 7

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JULY 1 9 5 9

1 1 1 A