PHOTOVOLT CORP

---

PHOTOVOLT

Electronic

p H METERS

A complete Une of pH meiers incorporating modem electronic tubes and circuits, simple in operation and maintenance, featuring sealed amplifier plug-in 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 law price of only

Write f o r Bulletin #225

-

$115.

M O D E L 125

Line-Operated Model 110 • •

Single range 0-14, scale length 7", accuracy 0.02 pH unit. Available also with shielded compartment, with baso board and carrying hood, with bottles and beakers, additional price $60.—.

Write f o r Bulletin r/105

$185.—

Battery-Operated Model 125 Single range 0-14, scale length SVi", accuracy 0.03 pH unit. Only 3 batteries, standard radio typo, 2,000 hours of service. Carrying frame for instrument, beakers, and bottles, price S20.—. Stabilised power supply unit available for alternative operation from 110 volt AC line, price $48.—.

M O D E L 115

$145—

Write for Bulletin i l l 8

Battery-Operated Model 125-B for Blood p H • •

Scale length 24!i", expanded five-fold for blood pH tests. Accuracy 0.01 in pH 6-8 range, 0.05 in pH 2-12 range.

Write for Bulletin Î122

M O D E L 125-B

$165.—

Prices include PHOTOVOLT glass electrode and calomel electrode. Electrodes of other makes usable, adapters available.

MODEL 110

Ρ

HOTOVOLT C O R P O R A T I O N • I %»# I V » # W \ e # LU I OC M A D I S O N A V E N U E

Υ Ι16, Α Ν 95 MADISON AVENUE, Ν Ν. Υ. Ν. Υ Y.

For further information, circle number 1 5 A - 1 on Readers' Service Card, page 61 A

PHOTOVOLT Densitometer

pr:

LUMETRON

for Partition Chromatography and Paper Electrophoresis

Photoelectric COLORIMETER and * FLUORESCENCE METER Mod. 402-EF

A high precision instrument- of unusual flexibility for a l l tests involving . . .

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 -800 to

P H O T O V O L T CORP. 95 Madison Avenue Also Colorimeters Fluorimetcrs Nephelometers

N e w York 16, Ν . Υ.

I 1 pH meters I Reflection Meters j Glossmeters

Electronic Photometer» Multiplier Photometer» Interference Filters

Circle No. 15 Δ-2 on Readers' Service Card, page 61 A

VOLUME

2 7 , N O . 10, O C T O B E R

1955

TRANSMISSION FLUORESCENCE NEPHELOMETRY Write

for

Literature

Prompt

Delivery

PHOTOVOLT CORPORATION 95 Madison A v e .

N e w Y o r k 1 6 , Ν . Υ.

Alto Colorimeter! Reflection Meter» Densitometer»

Circle

pH Meters Electronic Photometers Multiplier Photometers

No. 15 A-3 on Readers' Service

Card,

page 61 A

ISA