TLS-IB Site Prep Manual European Probe and Riser Installation Criteria (Non-PTB)
8
Where mechanical overfill prevention devices are installed, contractors
must
ensure that no part of these devices
w i ll be ob struc ted when the probe and rise r asse mbl y is instal le d.
Failure to comply with this warning may result
in the overfill prevention device not operating co rrectly.
European Probe and Riser Installation Criteria (Non-PTB)
All Mag Probes require installation using a 3-inch riser, regardless of tank entry size. All entry sizes, other than 3 inches,
m ust be adapted to 3 inches with suitable fittings. The minimum probe entry size that can be used is 2 inches.
W here possible, the canister of the probe should be completely contained within the 3-inch riser. In all cases, the probe
must rest on the bottom of the tank (see Figure 4).
IMPORTANT! Incorrect readings will result if the probe is not resting on the bottom of the tank.
Figure 4. Typical Probe Installations
GENERAL NOTES
• 3-inch risers, when fitted, should be a minimum of 100 mm above the probe cani ster (see Figure 5).
Figure 5. Minimum clearance above probe canister
2" Riser
Riser must be
2" ID and free
of burrs.
3" Riser
3" Riser
4"- 3" Reducing
bushing
4" Entry3" Entry2" Entry
Probe on tank bottom
Probe on tank botto
Fitted riser
00 mm minimum
probes\euro3.eps
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