M&C TechGroup Germany GmbH • Rehhecke 79 • 40885 Ratingen • Germany
info@mc-techgroup.com • www.mc-techgroup.com • Fon +49 2102 935-0 • Fax +49 2102 935-111
13.1
Embracing Challenge
Portable and rugged instrument, light-
weight
Analogue and digital linear indication
Physical measuring principle
Small stagnant volume, fast response
time
High accuracy and reliability
Approved according to DIN EN 14181
resp. to 13th and 17th BImSchV and TÜV
certicate TA-Luft as option
Special Features
Oxygen Analyser Series PMA®
Portable version PMA 10
for mobile oxygen measurement
PMA 10
Application
Due to the extremely fast response time
of the M&C magneto-dynamic measuring
cell with no stagnant volume as well as the
negligible cross sensitivity from other sample
gas components, the portable M&C oxygen
analyser PMA 10 has a wide variety of applica-
tions. The analyser is a suitable and reliable
instrument for monitoring oxygen concentra-
tions in various gas analytical control applica-
tions including flue gas-, inert gas-, fermen-
tation processes-, food packing machines-,
ambient air- and laboratory process control
measurements.
Description
The portable M&C oxygen analyser PMA 10 is
an non-thermostated instrument which has
been designed for continuous and discontin-
uous measurement of oxygen concentrations
in dry and particle-free sample gases.
The PMA 10 is a reliable and easy-to-operate
instrument and immediately operable. The
light-weight instrument is built into a port-
able housing. The four measuring ranges
are displayed on the analogue meter with
30%/100% scale and the 100% O
2
range
also on the digital meter. One output signal
0-1V is available as standard. Sample gas
connections as well as a connector for the
output signal are located on the front panel
of the analyser. The connectors for incoming
power supply and optional O
2
alarm contact
are located at the rear panel. The sample gas
enters the analyser via an internal protec-
tive fine-filter. The required flow rate can be
adjusted at the flowmeter with needle valve,
mounted on the front panel upstream the
M&C measuring cell.
Options: mA-output signal, O
2
alarm,
rechargeable battery, internal pump and TÜV
certificate.
Measuring principle of M&C ox-
ygen analyser
The PMA 10 utilises the paramagnetic
principle of operation to measure oxygen
concentrations. The analyser measures the
paramagnetic susceptibility of the oxygen
in the sample gas by means of the M&C
magneto-dynamic measuring cell. The physi-
cal property which distinguishes oxygen from
other gases is its paramagnetism. It is signifi-
cantly higher comparing to other common
gases. This operation principle is one of the
most accurate and reliable procedures to
determine the oxygen concentration in a
gas mixture from 0 to 100 Vol.%. The robust
M&C cross-flow cell has no stagnant volume.
Advantages are the fast response time, the
flow rate up to 60 l/hr, the small volume of 2
ml, the extremely low drift, the absolute linear-
ity and the negligible cross sensitivity against
other sample gas components. With a proper
sample conditioning and pressure, the M&C
cell will never need replacing. The dumbbell
with a small mirror at its centre is mounted in
a strong inhomogenous magnetic field. The
paramagnetic oxygen strengthens the forces
on the diamagnetic dumbbell and causes a
shifting which is detected by a system con-
sisting of light beam, mirror and a photo cell.
A compensation current is induced via the
feedback coil on the dumbbell and leads to
a reset of the dumbbell into its zero-position.
The required current is linearly proportional to
the oxygen concentration.
Technical specications and illustrations are without
obligation, subject to modications. 05.97/08.09
(3 Seiten)
(20 Seiten)
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