Balzers launch new concept in vacuum measuring instruments

Vacuum/volume 38/numbers Printed in Great Britain

8-l O/pages

957 to 983/l

0042-207X/88$3.00+.00

988

Pergamon

Press plc

VACUUM News Manufacturers Manufacturers

and others

and others are invited to submit information

Dr J S Colligon,

Department

of Electrical

New products Bakers launch instruments

for inclusion

University

in this feature.

of Salford,

Salford,

Items should

M5 4wT,

in vacuum

measuring

environments-it in modules

type vacuum

a breakthrough

measuring

gauge from Balzers

in the design and operational

in several versions with a range of plug-

process controller

with multiple

switching

In its simplest form the TPG 300

is a single system for total vacuum

replacing

as many as 4 separate

pressure measurement lengths can extend vacuum

is available

to adapt it from a simple indicating

measuring The TPG 300

from atmospheric corrosive

instrument

to a

points.

measurement

and

range from 1000

supplemented

is a double

Pirani gauge with a

mbar to 1 Oe3 mbar. This can be

with a second

Pirani gauge module to provide four-

gauges to offer continuous

channel

pressure monitoring.

down to lo-”

replaced

with a choice of one or two Penning

to 500 metres. Designed

application-including

to:

range of such

instruments.

control,

be addressed

UK

and developments

new concept

A new Pirani/Penning represents

Engineering,

mbar. Cable

for virtually any high

it becomes

a combined

pressure measurement

or radiation

12 programmable A key feature cathode

from atmospheric

switching

head with a design

to lo-”

a single compact

range. In addition,

of sturdier construction

magnetron

unit to cover such

it has the inherent

cold cathode

and reliability

over hot

at lower pressures often suffer from filament

Furthermore,

cold cathodes

at least ten times faster, which control

mbar, with up to

is the Balzers IKR 020 cold

design advantage and fatigue.

boards. Thus,

based on the inverted

a wide measuring which

gauge

meter that gives continuous

points.

It is this that enables

cathodes,

either of these can be

ultra high vacuum

of the TPG 300 concept

gauge

principle.

Alternatively,

burn out

react to pressure changes

is particularly

important

in process

applications.

All parameters manually

on the TPG 300 are fully programmable,

or through

switching

an RS 232-C

points provide separate

cover the entire measuring Information readout

overshoot,

threshold

parameters available, Typical

applications

and/or

control

experimental

in operation

More information

is shown

displays values for pressure, settings,

that

on the digital range undershoot

or

circuit board configuration, signal however

is permanently

of the status of the display. for the TPG 300 will be the measurement

of total pressures set-ups

either while adjustable

upper and lower thresholds

or error code. The analogue regardless

interface,

range.

on the program

panel, which

computer

in vacuum

and production

can be obtained

chambers,

pumps,

plants.

from

: Colin Willkinson Balzers High Vacuum

The TPG 300 is a unique design of PiranijPenning Bakers

that cover any total pressure

atmospheric

pressure

At its simplest

and lo-”

range between

maximum

the TPG 300 is a double

gauge heads, UHV measurement of 12 switching

Road, Berkhamsted,

Tel 04427

the limits of

Ltd

Herts HP4 1 EN 2181

mbar. Pirani gauge from atmosphere

to 10m3 mbar. Bv the use of supplementary cathode

Northbridge

gauge from

points.

plug in boards and cold can be achieved

with a

A new approach A newly developed

to freeze method

resulted in the FSU 010,

preparation

of SEM specimen

a programmable

from

Bakers

preparation

freeze substitution

has unit.

957