Teledyne Insta Trans - trace and percent oxygen transmitter - Manual (Page 18)

Operational Theory Insta-Trans
Teledyne Analytical Instruments 10
2.3 Sample System
The sample system delivers gases to the Micro-fuel Cell sensor
from the transmitter gas inlet. Depending on the mode of operation
either sample or calibration gas is delivered.
The Insta-Trans sample system is designed and fabricated to ensure
that the oxygen concentration of the gas is not altered as it travels
through the sample system. The sample encounters almost no dead
space. This minimizes residual gas pockets that can interfere with trace
analysis.
The sample system for the standard instrument incorporates 1/8
inch tube fittings for sample inlet and outlet connections. For metric
system installations, 6 mm adapters can be supplied with each
instrument to be used if needed (consult factory). The sample gas flows
through the transmitter as shown in Figure 2-4.
Figure 2-4: Gas and Other Connections to the Transmitter