Measuring System - Endress+Hauser Levelflex FMP51 Technical Information

Measuring system

8
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:
Type of probe
Feature 060 - Probe: Option:
AA
AB
AC
AD
AL
AM 1/2" (AlloyC)
BA
BC
BB
BD
Max. probe length
For application
1) Multiple punched: optional; standard for interface measurement
Levelflex FMP51
Rod probe
A0011387
Option:
8 mm (316L) LA
1/3" (316L) LB
12 mm (316L) MB
1/2" (316L) MD 1/6" (316) with center
12 mm (AlloyC)
16 mm (316L)
divisible
0.63 in (316L)
divisible
10 m (33 ft)
level and interface level and interface
measurement in liquids measurement in liquids
Levelflex FMP51, FMP52, FMP54
Rope probe Coax probe
A0011388
Option:
4 mm (316) UA ... mm (316L)
1/6" (316) UB ... inch (316L)
4 mm (316) with UC ... mm (AlloyC)
center rod
UD ... inch (AlloyC)
rod
45 m (148 ft) 6 m (20 ft)
level and interface
measurement in liquids
Endress+Hauser
1)
A0011359