PHOTOVOLT A complete simple in
line of operation
Electronic
pH
METERS
pH meters incorporating modern electronic tubes and and maintenance, featuring sealed amplifier plug-in
circuits, units.
Line-Operated Model 115 • • •
Single range 0-14, scale length 4", accuracy 0.05 pH unit. Fully stabilized for wide range of line voltage fluctuations. Unprecedented in compactness and low price of only
W r i t e f o r Bulletin - 2 2 5
$125.
MODEL 125
Line-Operated Model 110 • •
Single range 0-14, scale length 7". accuracy 0.02 pH unit. Available aUo with bhieldcd compartment, with base board and carrying hood, with bottles and bPalters, additional price $60.—.
W r i t e f o r Bulletin
: .105
$195.
Battery-Operated Model 125 • • • •
MODEL 115
Single range 0-14, scale length 5 1 V , accuracy 0.03 pH unit. Only 3 batteries, standard radio type. 2,000 hours of service. Carrying frame for instrument, beakers, and bottles, price 520.—. Stabilized power supply unit available for alternative operation from 110 volt AC line, price S48.—.
W r i t e f o r Bulletin «118
$155.
Battery-Operated Model 125-B for Blood pH • •
Scale length 2'W, expanded five-fold for blood pH tests. Accuracy 0 01 in pH 6-8 range, 0.05 in pH 2-12 range.
W r i t e f o r Bulletin - 1 2 2 See also Bulletin
# 738 on pH Meter
o f pH meters without
electrodes
Tester Mod. 25 for checking
or buffers,
PHOTOVOLT
MODEL 110
MODEL 125-B
$175.
applicable
the performance
to pH meters o f any make.
I $58.
I
C O R P O R A T I O N 95 MADISON AVENUE, N. Y. 16, Ν. Υ.
For further information, circle number 31 A-1 on Readers' Service Card, page 91 A
PHOTOVOLT 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 B u l l e t i n - 8 0 0 to
PHOTOVOLT CORP. 95 Madison Avenue Also Colorimeters Fluorimeters Nephelometers
p H meters Reflection Meters Gloisineters
New York 16, Ν. Υ. Electronic Photometers M u l t i p l i e r Photometers Interference Filters
Circle No. 31 A-2 on Readers' Service Card, paje 91 A
Line-Operated
* High-sensitivity for measurement of low concentrations ( f u l l scale for 0.001 microgram quinine sulphate) * Micro-fluorimetry with l i q u i d 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 (or 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 W r i t » fnr R,.lief in i l 0 9 t n
PHOTOVOLT CORP. 95 Madison A v e .
New York 15, Ν. Υ.
Circle No. 31 A-3 on Readers' Service Card, page 91 A V O L . 2 9 , N O . 2 , FEBRUARY 1 9 5 7
·
31
A
