S E L E C T I O N
COAXIAL TYPE GWR PROBE
G U I D E
TWIN ROD/CABLE TYPE GWR PROBE
SINGLE ROD/CABLE TYPE
signal propagation
signal propagation
signal propagation
end view
end view
Application
Dielectric
Limit
Temperature
Limits
Pressure
Vacuum
Applications
Overfill Safe
Foam
GWR
Probe
Coaxial GWR Probes:
Maximum Viscosity 500 cP (I.D.
3
⁄
4
") – 1500 cP (I.D. 1
3
⁄
4
")
Level
High Temp./High Pressure
Level/Interface
ε
r
1.4–100
ε
r
1.4–100
ε
r
1.9–100
ε
r
1.9–100
ε
r
1.9–100
ε
r
1.9–100
ε
r
1.9–100
ε
r
1.9–100
ε
r
4–100
ε
r
10–100
ε
r
1.4–100
-40° to +400° F max 1015 psig
(-40° to +200° C)
(70 bar)
-321° to 800° F max 6250 psig
(-196° to +430° C)
(430 bar)
up to +650° F
(up to +345° C)
max 2250 psig
(155 bar)
Yes
Full
Yes
Yes
Yes
Yes
No
Yes
No
No
No
No
7xR
7xM
7xD
7xL
7xS
7xT
7xN
Saturated Steam
Interface
-40° to +400° F max 1015 psig
(-40° to +200° C)
(70 bar)
Twin Rod/Cable GWR Probes:
Maximum Viscosity 1500 cP
-40° to +400° F max 1000 psig
(-40° to +200° C)
(70 bar)
-40° to +400° F max 1000 psig
(-40° to +200° C)
(70 bar)
Ambient
Atmospheric
Yes
Yes
Yes
No
No
No
Yes
No
n/a
7xB
7x7
7x5
Liquids – Rod
Liquids – Cable
(level/interface)
Solids – Cable
Single Rod/Cable GWR Probes:
Maximum Viscosity 10,000 cP
-40° to +300° F max 1000 psig
(-40° to +150° C)
(70 bar)
-40° to +300° F max 1000 psig
(-40° to +150° C)
(70 bar)
Ambient
Atmospheric
Yes
Yes
Yes
Yes
No
No
No
No
Yes
Yes
n/a
Yes
7xF
7x1
7x2
7xJ
Liquids – Rod
Liquids – Cable
Solids – Cable
High Temp./
High Pressure
Each Eclipse probe can be used for vacuum service (negative pressure) but only the Borosilicate
Eclipse is ideally suited to be used on foaming applications but in specific conditions where dense
GWR probes (7xD/7xL) are suited for full vacuum conditions (Helium leak < 10
-8
cc/s @ 1 bar abs.)
foam can enter in the stilling well, coaxial GWR probes are not recommended.
-40° to +600° F max 3002 psig
(-40° to +315° C)
(207 bar)
Depends on the spacer material. See model selection 7xD/7xL GWR probe.
For media with
ε
r 1.9 to 10, GWR probe must be mounted between 3" and 6" (75 and 150 mm)
away from the metal tank wall or in a metal cage/stillwell.
5
MAGNETROL [ MAGNETROL INTERNATIONAL, INC. ]
