Ametek Thermox Series 2000 WDG-IV User Manual page 42

Figure 3-6. WDG-IV sensor flush mount (preferred).
1.
3-10 | Thermox Series 2000 WDG-IV / IVC / IVCM
Sensor flush mount (Preferred Method)
Weld the 7" x 7 5/8" (17.78 cm x 19.37 cm) mounting plate supplied with
the sensor to the process wall over a 3 3/4" (9.52 cm) diameter hole as
shown in Figure 3-6. Then bolt the sensor to the mounting plate. This
method positions the sensor as close to the process as possible and mini-
mizes any chance that the sample gas will cool below its dewpoint.
Customer-supplied pipe nipple sensor mounting
If you can't mount the sensor flush with the process as described in the
previous section (for example, the process wall is curved sharply, covered
with insulation, or obstructed with reinforcing members) you can instead:
Weld a short 3 1/2" diameter pipe nipple to the process wall and make
sure to extend the nipple through the skin of the process (see Figure 3-7).