P R O B L E M A T I C A P P L I C A T I O N S
G U I D E D W A V E R A D A R A L T E R N A T I V E
Some applications can be problematic for Non-Contact
Radar. The following are examples of when Guided
Wave Radar is recommended.
•
Extremely low dielectric media (
ε
r<1.7)
•
Very weak reflections from the liquid surface
(particularly during turbulence) can cause poor
performance.
•
Tanks heavily cluttered with false targets (mixers,
pumps, ladders, pipes, etc.)
•
During times of very low liquid levels of low dielec-
tric media, the metal tank bottom may be detected,
which can deteriorate performance.
•
Foam can either absorb or reflect the microwave
energy depending upon the depth, dielectric, density
and wall thickness of the bubbles. Due to typical
variations in the amount (depth) of foam, it is
impossible to quantify performance. It may be
possible to receive most, some or none of the
transmitted energy.
•
Extremely high liquid level (Overflow) conditions
when liquid very near the antenna can cause
erroneous readings and measurement failure.
•
Interface applications
Refer to ECLIPSE Model 706 Guided Wave Radar
bulletin 57-106.
8
Material Code
Maximum
Temperature
Maximum
Pressure
Min.
Temp.
Recommended
For Use In
Not Recommended
For Use In
Viton
®
GFLT
0
+400 °F @ 232 psi
(+200 °C @ 16 bar)
750 psi @ +70 °F
(51.7 bar @ +20 °C)
-40 °F
(-40 °C)
General purpose, ethylene
Ketones (MEK, acetone),
skydrol fluids, amines, anhy-
drous ammonia, low molecular
weight esters and ethers, hot
hydrofluoric or chlorosulfuric
acids, sour HCs
Kalrez
®
4079
2
+400 °F @ 232 psi
+(200 °C @ 16 bar)
750 psi @ +70 °F
(51.7 bar @ +20 °C)
-40 °F
(-40 °C)
Inorganic and organic acids
(including HF and nitric),
aldehydes, ethylene, glycols,
organic oils, silicone oils, vinegar,
sour HCs
Black liquor, hot water/steam,
hot aliphatic amines, ethylene
oxide,propylene oxide, molten
sodium, molten potassium
➀
Simriz SZ485
(formerly
Aegis PF128)
8
+400 °F @ 232 psi
+(200 °C @ 16 bar)
750 psi @ +70 °F
(51.7 bar @ +20 °C)
-4 °F
(-20 °C)
Inorganic and organic acids
(including HF and nitric),
aldehydes, ethylene, glycols,
organic oils, silicone oils, vinegar,
sour HCs, steam, amines, ethyl-
ene oxide, propylene oxide,
NACE applications
Black liquor, Freon 43, Freon 75,
Galden, KEL-F liquid, molten
sodium, molten potassium
Kalrez
®
6375
A
400 °F @ 232 psi
(200 °C @ 16 bar)
750 psi 70 °F
(51.7 bar @ 20 °C)
-40 °F
(-40 °C)
Inorganic and organic acids
(including hydro fluids and nitric),
aldehydes, ethylene, organic oils,
glycols, silicone oils, vinegar,
sour HCs
Hot water/steam, hot aliphatic
amines, ethylene oxide, propylene
oxide
Quartz
N
+750 °F @ 1375 psi
(+400 °C @ 94.8 bar)
2320 psi @ 70 °F
(160 bar @ +20 °C)
-100 °F
(-70 °C)
General high temperature/high
pressure applications,
hydrocarbons, full vacuum
(hermetic), ammonia, chlorine
Hot alkaline solutions HF acid,
media with ph>12, direct exposure
to saturated steam
➀
M300 °F (+150 °C) for use on steam.
O - R I N G ( S E A L ) S E L E C T I O N C H A R T
