CALIBRATE ON ONE EXPANDED RANGE . . . READ ON OTHERS -WITHOUTRECALIBRATING
Corning MODEL 12 Expanded
Scale
pH METIER
EXPANDED 1 pH Full Scale
JLjook at the large, easy-to-read meter on this new instrument designed for extremely precise pH and millivolt readings, oxidation-reduction meas urements, and Karl Fischer titrations. You'll like the simplicity of operation . . . the speed with which accurate determinations can be made . . . the fact that you can calibrate on one expanded range and read on others without re calibrating. The Model 12 is stabilized for line voltage fluctuations from 105-135 volts AC, and is easily modified for use with 220 volts. It operates whether samples or a recorder are grounded or unground ed. Ask us for bulletin PH-]. H-3550X
Model
12 pH Meter complete with acces
sory kit, for 1 1 5 volts, 5 0 / 6 0 cycles AC. Price
$495.00
SCIENTIFIC GLASS APPARATUS CO. INC
. Branches:
Boston 16 Ma$s
Danbury Conn
Elk Grove Village ,„
1 00 mv Full Scale
Smallest Division
0.005 pH
0.5 mv
Input Impedance
10 l 3 ohms
TO13 ohms
Repeatability
± 0 . 0 0 2 pH
± 0 . 2 mv
Amplifier Drift between 20° and 3 0 " C
0.003 pH/day non-cumulative
200 microvolts/day non-cumulative
Relative Accuracy
'with buffer & sample in same range ± 0 . 0 0 5
+ |1.0 mvto 0 . 2 % of reading)
NORMAL 0-14 pH
Oto ± 1 4 0 0 mv
Smallest Division
0.1 pH
10 mv
Input Impedance
10 M ohms
10'* ohms
Repeatability
± 0 . 0 2 pH
± 2 . 0 mv
Amplifier Drift between 20° and 30° C
Negligible
Negligible
Relative Accuracy
± 0 . 0 5 pH
± 5 . 0 mv
* at buffer point ± 0 . 0 0 2 pH; under other conditions ± 0 . 0 1 pH
Fullerton Ca|.f
Philadelphia 2 ?mna
Silver Spring
Syracuse 2
M(|
N
γ
Circle No. 79 an Readers' Service Card
B L O O M F I I E L D ,
N E W
J E R S E Y
VOL. 36, NO. 6, MAY 1964
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81 A
