PHOTOVOLT CORP

---

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