Levelflex FMP51, FMP52, FMP54
10 Endress+Hauser
Measuring system General notes on probe selection
• Normally use rod or coax probes for liquids. Rope probes are used in liquids for measuring ranges >
10 m (33 ft) ( > 4 m (13 ft) for FMP52) and with restricted ceiling clearance which does not allow
the installation of rigid probes.
• For interface measurement, ideally coax probes or rod probes in a bypass/stilling well are used.
• Coax probes are suited to liquids with viscosities of up to approx. 500 cst. Coax probes can measure
most liquefied gases, as of a dielectric constant of 1.4. Moreover, installation conditions, such as
nozzles, tank internal fittings etc., have no effect on the measurement when a coax probe is used.
A coax probe offers maximum EMC safety when used in plastic tanks.
Probe selection
The various types of probe in combination with the process connections are suitable for the following
applications
2)
:
Levelflex FMP51
Type of probe Rod probe Rope probe Coax probe
1)
A0011387
A0011388
A0011359
Feature 060 - Probe: Option: Option: Option:
AA 8 mm (316L) LA 4 mm (316) UA ... mm (316L)
AB 1/3" (316L) LB 1/6" (316) UB ... inch (316L)
AC 12 mm (316L) MB 4 mm (316) with
center rod
UC ... mm (AlloyC)
AD 1/2" (316L) MD 1/6" (316) with
center rod
UD ... inch (AlloyC)
AL 12 mm (AlloyC)
AM 1/2" (AlloyC)
BA
BC
16 mm (316L)
divisible
BB
BD
0.63 in (316L)
divisible
Max. probe length 10 m (33 ft)
2)
45 m (148 ft) 6 m (20 ft)
For application level and interface
measurement in liquids
level and interface
measurement in liquids
level and interface
measurement in liquids
1) Punched for process connections G1-1/2" or flange; multiple holes for 316L, one hole for AlloyC
2) Maximum probe length for indivisible rod probes: 4 m (13 ft)
2) If required, rod and rope probes can be replaced. They are secured with Nord-Lock washers or a thread coating. For further information on
service and spare parts please contact the Endress+Hauser service.
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