Probe Installation
Probe Installation
11
CAUTION!
Handle probes carefully. Striking or dropping the probe will result in loss of calibration and could
cause permanent damage.
Figure 7. TLS-50 Probe Installation Example - Underground Storage Tank
Figure 8. TLS-50 Probe Installation Example - Above ground Storage Tank
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Riser cap with cord grip
bushing and nut
Concrete slab or packed
earth per NFPA 80
Riser pipe: 2-, 3-, or 4'' API schedule 40
depending on probe type (To prevent
erroneous probe readings, install probe
riser a minimum of 24'' from the submersible
pump.)
Cord grip seals
Weatherproof junction box with 1/2" NPT
threads (16 cubic inch minimum)
14'' min. dia. manhole
Seal-off, epoxy seal per NFPA spec
Mag Probe
(rests on bottom)
Tank
A = 14" minimum for global mag
plus/mag plus probes. When
installing a probe longer than the
the tank diameter, increase this
minimum dimension to compensate.
(Example: a 7'-6'' diameter tank will
use an 8' probe, in which case you
must add 6" to minimum riser length
'A', i.e., 20").
probes\pbinstcen.eps
1/2" Rigid conduit (to Console)
Probe cable
A
Split-Ring Collar
(P/N 576008-617)
required if probe
enters the riser.
Top view
Side view
3/4" ID
Use bushing and body of grip
fitting supplied with probe and
Adaptor nut supplied with
AST kit.
Epoxy seal per NFPA specs
Flexible metal conduit
supplied with AST kit
Weatherproof junction box with
1/2" NPT threads (16 cubic inch
minimum)
Rigid conduit
Liquidtight
fittings from
AST kit
Mag Probe
(rests on bottom)
probes\astpbins.eps
Riser pipe: 2-, 3-, or 4'' API
schedule 40 - depending on
probe type
A
A = 14" minimum for global mag
plus/mag plus probes. When
installing a probe longer than the
the tank diameter, increase this
minimum dimension to compensate.
(Example: a 7'-6'' diameter tank will
use an 8' probe, in which case you
must add 6" to minimum riser length
'A', i.e., 20").
Split-Ring Collar
(P/N 576008-617)
required if probe
enters the riser.
Top view
Side view
3/4" ID
