Overview; Sensor - Ametek Thermox WDG Insitu User Manual

Sensor

The WDG Insitu is a direct-insertion-type oxygen probe where the zirco-
nium oxide cell is directly placed in the stream of the products of combus-
tion. This patented insitu is designed for applications where the flue gas
temperature does not exceed 1250 °F (675 °C), and where combustibles
measurements are not required. The outer probe material is RA330 which
is highly resistant to corrosion.
With the unique design of the insitu probe, you can easily replace compo-
nents in the field. While the outer protection tube remains in the process,
the inner tube structure that houses the oxygen cell and furnace/thermo-
couple assembly, can be easily removed. See Figure 1-1. With no need to
return the probe to the factory, extensive downtime and expensive repairs
on your probe are no longer necessary.
Cautions to Observe

OVERVIEW

Even following a considerable period after shutdown, the components
inside the probe can be hot enough to cause burns.
Exercise proper safety precautions.
Turn off power to the probe and control unit when working on the
probe case. The probe is powered even when the control unit is turned
off since the probe power is a separate power source.
Overview | 1-1