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<3. Installation>
3-7
IM 11M13A01-04E
3.1.6 Probe (Detector) Insertion Hole
CAUTION
• The outside dimension of the probe may vary depending on its options. Use a pipe that is large
enough for the probe. Refer to Subsection 2.1.2 for the dimensions.
• If the probe is mounted horizontally, the calibration gas inlet and reference gas inlet should face
downwards.
• The sensor (zirconia cell) at the probe tip may deteriorate due to thermal shock if water drops are
allowed to fall on it, as it is always at high temperature.
(1) Do not mount the probe with the tip higher than the probe base.
(2) The probe should be mounted at right angles to the sample gas flow or the probe tip should point
downstream.
100 mm
100 mm
F3-3E.ai
(vertical)
Bounds of the probe
insertion hole area
Flange matches
the detector size
(horizontal)
Type Outside diameter of probe
Standard 52 mm in diameter
With probe protector 60.5 mm in diameter
Four-hole flange Eight-hole flange
*1
*1
Figure 3.5 Example of forming probe insertion hole
3.1.7 Installation of the Probe (Detector)
CAUTION
• The cell (sensor) at the tip of the probe is made of ceramic (zirconia). Do not drop the probe, as
impact will damage it.
• A gasket should be used between the flanges to prevent gas leakage. The gasket material
should be heatproof and corrosion-proof, suited to the characteristics of the sample gas.
The following should be taken into consideration when mounting the probe:
(1) Make sure that the cell mounting screws (four bolts) at the probe tip are not loose.
(2) Where the probe is mounted horizontally, the calibration gas inlet and the reference gas inlet
should face downward.