P R O B E
Description
Materials
S P E C I F I C A T I O N S
7xT / 7xN: Interface GWR Probe
7xR / 7xM: Overfill Protection Coaxial Probe
Probe
Process seal
Spacers
Small coax
Large coax
7xB: Standard Twin Rod GWR Probe
Probe diameter
316/316L (1.4401/1.4404)
Hastelloy C
®
(2.4819) or Monel
®
(2.4360)
TFE with Viton
®
GFLT or Kalrez 4079 (Consult factory for alternatives)
Teflon
Inner rod 0.31" (8 mm)
Two 0.5" (13 mm) Ø rods –
Outer tube 0.87" (22.5 mm)
22 mm (0.875") C to C
L
L
Stainless steel:
Inner rod 0.63" (16 mm) – Outer
tube 1.75" (45 mm)
Hastelloy C and Monel:
Inner rod 0.63" (16 mm) –
Outer tube 1.92" (49 mm)
In-tank mounting / external cage mounting
– overfill safe
Threaded:
3
⁄
4
" NPT or 1" BSP (G1) – except for
enlarged probe
Flanged:
Various ANSI, DIN or “proprietary”
mating flanges
In-tank mounting only. Twin rod probe must be
used in metallic vessel or stillwell > 1" (25 mm) from
any surface or obstruction
Threaded:
2" NPT or 2" BSP (G2)
Flanged:
Various ANSI, DIN or “proprietary”
mating flanges
Mounting
Process Connection
Probe length
Transition Zone
Process Temp.
Top
Bottom
Max
From 24 to 240 inches (60 to 610 cm), selectable in 1-inch or 1-cm increments
None
ε
r
≥
1.9 = 6" (150 mm)
ε
r: 1.4 = 6" (150 mm)/
ε
r: 80 = 2" (50 mm)
ε
r: 1.9 = 6" (150 mm)/
ε
r: 80 = 1" (25 mm)
+400° F @ 270 psi (+200° C @ 18 bar)
Min
Max. Process Pressure
Max. Viscosity
Dielectric Range
Vacuum service
Media coating
-40° F @ 750 psi (-40° C @ 50 bar)
1000 psi @ +70° F (70 bar @ +20° C)
500 cP
Upper liquid:
≥
1.4 and
≤
5, Lower liquid:
≥
15
Negative pressure but not hermetic seal
In case of media coating, select 7xN probe.
1000 psi @ +70 °F (70 bar @ +20° C)
1500 cP
1.9 to 100
Film: 3% error of coated length,
bridging not recommended
Description
Materials
Probe
Process seal
Probe diameter
Mounting
Process Connection
Probe length
Blocking distance (top)
Transition Zone
(bottom)
Process Temp.
Max
Min
Max Process Pressure
Max Viscosity
Dielectric Range
Mechanical load
Pull-down force
Media coating
7xF: standard single rod
7xJ: HTHP single rod
®
316/316L (1.4401/1.4404), Monel (2.4360),
316/316L (1.4401/1.4404), Monel
®
(2.4360) or
®
Hastelloy C (2.4819) or PFA insulated 316/316L
Hastelloy C
®
(2.4819)
(1.4401/1.4404)
TFE with Viton
®
GFLT or Kalrez 4079
PEEK with Aegis PF 128
(Consult factory for alternatives)
Bare: 0.50" (13 mm) -
Bare: 0.50" (13 mm)
PFA coated: 0.625" (16 mm)
See mounting considerations on page 25
Threaded:
2" NPT or 2" BSP (G2) –
Flanged:
Various ANSI or EN/DIN
From 24 to 240 inches (60 to 610 cm) selectable in 1-inch or 1-cm increments
4.8" up to 36" (12 up to 91 cm) - depending probe length (adjustable)
ε
r
≥
10: 1" (25 mm)
+300° F @ 400 psi (+150° C @ 27 bar) ambient
+600° F @ 2250 psi (+315° C @ 155 bar)
-40° F @ 750 psi (-40° C @ 50 bar) – 200 psi (13.7 bar) for 7xF-F
1000 psi @ +70° F (70 bar @ +20° C)
3000 psi @ +70° F (207 bar @ +20° C)
10.000 cP – consult factory in case of agitation/turbulence
ε
r 10-100 (depending installation conditions, down to
ε
r
≥
1.9) – liquids
Not applicable
Not applicable
Maximum error of 10% of coated length. % Error is related to dielectric of medium, thickness of
coating and coated probe length above level.
Consult factory for insertion length < 24" (60 cm)
Transition Zone (zone with reduced accuracy) is dielectric dependent;
ε
r = dielectric permitivity. It is recommended to set 4–20 mA signal outside transition zones.
See tables on page 9.
Bridging is defined as continuous accumulation of material between the probe elements.
Viton
®
is a registered trademark of DuPont Performance Elastomers.
8
MAGNETROL [ MAGNETROL INTERNATIONAL, INC. ]
