PHOTOVOLT A
complete
simple
in
line
of
operation
pH
Electronic
meters
and
incorporating
maintenance,
modern
featuring
p H METERS electronic
sealed
tubes
amplifier
and
circuits,
plug-in
units.
Line-Operated Model 85 * Single range 0-14, scale length 3", readable to 0.1 pH unit. * Fully stabilized, simple, compact, available with carrying case. * A full-fledged pH meter usable wilh all types af electrodes. Write for Bulletin i l 9 5
$105.
Line-Operated Model 115 * Single range 0-14, scale length 4", readable to 0.05 pH unit. * Temperature control 20-60"C, available with carrying case. * Additional millivolt seal? for rpdox measurements and titrations.
Write for Bulletin =225 Line-Operated Model 110 MODEL 85
MODEL 110
$130.—
* Single range 0-14, scale length 7", readable to 0.02 pH unit. * Temperature control 0-100"C, voltage selector for 80-260 volts. * Available with carrying covi»t & baseboard for bottles, beakers. Write for Bulletin .= 105
$200.—
Battery-Operated Model 125 * Single range 0-14, scale length 5 1 Î " , readable tn 0 03 pH unit. * Only 3 batteries, itandaid radio type, 2,000 houis of service. * Available with carrying frame for instrument, beakers, bottles. Write for Bulletin -3118
$160.
Ail prices include sut of qiciss cl^cticd? end cci or->>l uIuctrcJL·. Wilh com bi nation gtass-rinrl-i-'ilm--! t'li'rticj-i* (p'ebe), ci+ditionp' price S3.00. See also Bulletin
# 738 on pH Meter Tester Mod. 25 for checking the
of pH meters without
MODEL 115
electrodes
or buffers,
PHOTOVOLT
applicable
MODEL 125 performance
to pH meters of any make.
$58.
C O R P O R A T I O N 95 MADISON AVENUE. Ν. Υ. 16, Ν. Υ.
For further information, circle number 70 A-1 on Readers' Service Card, page 97 A
PHOTO VOLT Densitometer
PHOTOVOLT
for Partition Chromatography and Paper Electrophoresis
Multiplier FLUORESCENCE METER Mod. 540
A photoelectric precision instrument for the rapid and convenient evaluation of strips and sheets of filter paper in partition chromatography and paper electrophoresis. Write for Bulletin
- 8 0 0 fo
P H O T O V O L T CORP, 95 Madison Avenue Also Colorimeters Fluorimeters Nephelometcrs
pH meters Reflection Meters Glossmcters
New York 16, Ν . Υ. Electronic Photometers Multiplier Photometers Interference Filters
Circle No. 70 A-2 on Readers' Service Card, page 97 A
70 A
·
ANALYTICAL CHEMISTRY
Line-Operated
*
High-sensitivity for measurement of low concentrations (fullscale for 0.001 microgram quinine sulfate)
*
Micro-fluorimetry with liquid volumes as low as 1 ml
*
Low blank readings, strict linearity of response
*
Universally applicable due to great variety of available filters, sample holders, and other accessories
*
Interference Filters for high specificity and for determining spectral distribution of the fluorescence
*
High-sensitivity nephelometry for minute turbidities
*
Fluorescence evaluation of powders, pastes, and solids, also in spot-tests on filter paper without elution
Write for Bulletin #392 to
PHOTOVOLT CORP. 95 Madison A v e .
New York 15, Ν . Ύ.
Circle No. 70A-3 on Readers' Service Card, page 97 A
