6
INM MTL 130-0202 Rev 4
NOTE
Care must be taken to ensure that the tubing etc, carrying the sample from the take-off
point to the katharometer entry is completely obscured from any light, otherwise the
analyser will report a lower hydrogen concentration for the sampled process gas. This
fact would of course be true for any other thermal conductivity analyser performing this
measurement.
Perma Pure dryers have been found to be very effective in drying the sample. Two optional
configurations of these are shown below - a) aspirated or b) pumped. System designers and
installers should consult Perma Pure for detailed advice before installing any system. (www.
permapure.com)
a) Sample conditioning - Aspirated version
b) Sample conditioning - Pumped System
Calibration
Gas In
Sample
Gas In
Wash
Water
Dryer
Instrument Air in
To Vent
Filter
Aspirator
Drain
Catchpot
Dryer
Flowmeter
and Valve
Sample
Flowmeter
and Valve
To Vent
Katharometer
Assembly
0
2
4
6
8
10
40
80
120
lbf/in
2
bar
Katharometer Assembly
WASH
DRAIN
IN
OUT
*
Calibration
Gas In
Sample
Gas In
Wash
Water
Dryer
Instrument Air in
To Vent
Filter
Drain
Catchpot
Dryer
Flowmeter
and Valve
Sample
Flowmeter
and Valve
To Vent
Pump
Katharometer
Assembly
0
2
4
6
8
10
40
80
120
lbf/in
2
bar
Katharometer Assembly
WASH
DRAIN
IN
OUT
