Overview - Ametek Thermox 2000 ATEX Series User Manual

OVERVIEW

Designed for applications with high particulate levels in the gas stream,
the sensor mounts directly on the combustion process to provide continu-
ous measurement of oxygen (HPII), or oxygen and combustibles (HPIIC).
Since the sample inlet and return are inside the filter and at the same abso-
lute pressure as the process, there is no flow through the filter. The sample
in the filter flows through the sensor plumbing because of a convective
motive force. The sample in the vertical cell housing is heated to 695
while the sample in the return vertical tube is at about 250
ture difference generates a density difference, which circulates the gas
through the system. Process gas enters and replenishes the gas inside the
filter by diffusion only. Thus the filter never blocks, making it ideal for
high particulate applications.
Follow these precautions when working on the sensor:
Remove AC power from the sensor and allow it to cool for at least
!
one hour before performing any maintenance or troubleshooting
WARNING
activities.
The outside of the sensor cover and all sensor assembly components
are hot during normal operation (up to 500
o
260 C inside the cover). Allow sensor components to cool for at
least an hour before working inside the sensor. Use caution and
wear appropriate gloves when handling components or when
touching the sensor cover!
o C,
o
C. The tempera-
o F inside the furnace,
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Overview 1-1