Mounting
Micropilot S FMR533 4 to 20 mA HART
14
Hauser
Measuring range
The usable measuring range depends on the size of the antenna, the reflectivity of the medium, the
mounting location, and eventual interference reflections.
The following tables describe the groups of media as well as the achievable measuring range as a
function of application and media group. If the dielectric constant of a medium is unknown, it is
recommended to assume media group B to ensure a reliable measurement.
Measuring range depending on product class
Media group
DC (
ε
r)
Examples
A
1.4 to 1.9
non-conducting liquids, e.g. liquefied gas (LPG). For more information please contact
your Hauser representative
.
B
1.9 to 4
non-conducting liquids, e.g. benzene, oil, toluene, white products, black products,
crudes, bitumen/asphalts, …
C
4 to 10
e.g. concentrated acids, organic solvents, esters, aniline, alcohol, acetone, …
D
> 10
conducting liquids, e.g. aqueous solutions, dilute acids and alkalis
Media group
Free space (Storage tank)
Measuring range
A
DC (
ε
r) = 1.4 to 1.9
—
B
DC (
ε
r) = 1.9 to 4
40 m (131 ft)
C
DC (
ε
r) = 4 to 10
40 m (131 ft)
D
DC (
ε
r) > 10
40 m (131 ft)
max. measuring range with
custody transfer approvals
25 m (82 ft) (NMi)
30 m (98 ft) (PTB)
