UNION Instruments GmbH
INCA Analyzer Series
– Instruction Manual
Page 14 of 59
General description
3.2.3
Paramagnetic oxygen sensor (Parox) module
The Parox sensor measures the oxygen concentration in a gas by using the oxygen
paramagnetic properties.
The paramagnetic sensor offers better accuracy and is practically insensitive to other gases.
Compared to EC sensors, it needs no maintenance and offers a longer life time.
Figure 3-5: Parox module
3.2.4
Specific gravity module
The specific gravity module is designed for a continuous, on-line analysis of a gas stream. It
determines the specific gravity of the process gas in a specially designed sample chamber
using presence of a modulated acoustical field.
The module has high intrinsic linearity, long term stability and a short response time. It
requires no regular maintenance. After installation the sensor housing must be able to move
freely on the springs.
1
9
gas-inlet
ST2
Insulation
1
2
3
4
gas-outlet
LFE 209C
Figure 3-6: Specific gravity measuring cell, heated and insulated
1
Potentiometer 1 Zero
3
Suspension springs
2
Potentiometer 2 Span
4
Insulating discs
Measurement range : 0.2
– 2.2
Specific gravity of air : 1
