Endress+Hauser Levelflex M FMP40 Brief Operating Instructions page 14

Mounting
Since the tensile forces are also heavily dependent on the viscosity of the product, a higher safety
factor is necessary for highly viscouse products and if there is a risk of cornice build-up. In critical
cases it is better to use a 6 mm rope instead of a 4 mm one.
The same forces also act on the silo cover. On a fixed rope, the tensile forces are definitely
greater, but this can not be calculated. Observe the tensile strength of the probes or ensure that
the tensile strength of the probes is not exceeded.
Options for reducing the tensile forces:
• shorten the probe
• If the maximum tensile load is exceeded, check whether it would be possible to use a
non-contact Ultrasonic or Level-radar device.
2.3.8 Installation in liquid tanks
• When installing in agitation units, check whether a no-contact process (ultrasonic or radar)
would be better suited, especially if the agitator generates large mechanical loads on the probe.
• If Levelflex is, nevertheless, installed in tanks with agitators, it is better to use coax probes
which have a greater lateral loading capacity.
Standard installation
Using a coax probe offers great advantages when the viscosity of the product is ≤ 500 cSt and it
is certain that the product does not accumulate build-up:
• Greater reliability:
As of dielectric constant=1.4, measurement functions independently of all electrical
properties in all liquids.
• Internals in the tank and nozzle dimensions do not have any influence on measurement.
• Higher lateral load-bearing capacity than rod probes.
• For higher viscosity a rod probe is recommended, or using a non-contact measuring principle
with the Level-Radar Micropilot M.
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Levelflex M FMP40 FOUNDATION Fieldbus
Endress+Hauser