IAN S NEW Hew Mm-hlriiJuyauM
7401
pH INDICATOR
27 ma item* get qwi copy!
Making pH and redox measurements? Want the ultimate in convenience and ease of operation? Then you'll welcome L&N's new 7401 pH Indicator. Offering the latest in modern design, this new, rugged, metal-case instrument provides: • Modern sloping-front panel for easy operation • A large 7" mirrored meter for maximum readability • Rotary-type controls for maximum convenience of setability • A terminal board on the back of the indicator for quick connections of electrodes, recorder, range-change resistor and ground. And the 7401 pH Indicator offers the time-proven stabilized feedback measur ing circuit developed by L&N and widely accepted by laboratories.
Ace Mini-Lab is truly the small econo my size: it takes up less space, con siderable saving in reagent chemicals is effected and the good design of Ace Mini-Lab will facilitate your work. Mini-Lab is the first especially de signed and fully developed line of miniature glassware. It has been en thusiastically accepted in laboratories, in schools, everywhere. It is versatile, comes in f 1 4 / 2 0 and i 1 8 / 9 joints, a n d features a full line of component parts permitting endless variations. For the small economy size, try Ace Mini-Lab. The excellent design, the fact that the reduction in size has been accomplished without reduction in use fulness, will make Ace Mini-Lab the most satisfactory miniature glassware you have ever worked with.
LIST NO.—7401-A1 Assembly includes 7 4 0 1 pH I n d i c a t o r w i t h e l e c t r o d e s , holder, buffer, KCL. Ranges
Oto 14 pH
0 to ± 700 mv 0 to ± 1400 mv
Scale Div.
0.1 pH
10 mv
10 mv
Readability
0.02 pH
1.0 mv
2.0 mv
Reproduc ibility
0.02 pH
1.0 mv
2.0 mv
Limits of Error: Meter Ind. ±0.07pH* Recorder Output ± 0.035 p H "
± 5 mv
± 10 mv
±1.75mv
±3.5mv
* ± 0.03 pH when using careful measuring techniques. **±0.02 pH when using careful measuring techniques.
CASE—Metal, 1 1 " (w) χ 8M>" (d) χ 9" (h). Wt.: 13 lbs. Operates on 120 v, 50-60 ~. PRICE- $330.00 (subject to change with out notice). Specify List No. 7401-A1 (includes indicator, electrodes, holder, chemicals) when o r d e r i n g .
I N C O R P O R A T E D
LEEDS & NORTHUP AVENUE
' PHILA.
Write
ACE GLASS
Pioneers in Precision
4906STENTON
New Mini-Lab Brochure just oui! Dept. A for your copy!
44,
Circle No. 17 on Readers' Service Card
PA
Louisville, Ky.,
Vineland N. J.
Springfield, Mass.
Circle No. 24 on Readers' Service Card
VOL. 34, NO. 13, DECEMBER 1962
.
117 A
