Emerson Rosemount 5400 Series - Antenna Selection Guide;Measuring Range

15
Reference Manual
00809-0100-4026, Rev HA
Section 2: Transmitter Overview
November 2014
Transmitter Overview
2.6 Antenna selection guide/measuring range
The measuring range depends on the microwave frequency, antenna size, the dielectric
constant (H
r
) of the liquid, and process conditions. A higher dielectric constant value produces a
stronger reflection. The figures in the tables below are guidelines for optimum performance.
Larger measuring ranges may be possible. For more information, contact your local Emerson
Process Management representative.
A. Oil, gasoline or other hydrocarbons, and petrochemicals (H
r
= 1.9-4.0). In pipes or with
ideal surface conditions, for some liquefied gases (H
r
= 1.4-4.0).
B. Alcohols, concentrated acids, organic solvents, oil/water mixtures, and acetone
(H
r
= 4.0-10.0).
C. Conductive liquids, e.g. water based solutions, dilute acids, and alkalis (H
r
> 10.0).
Table 2-2. Rosemount 5402, Maximum Recommended Measuring Range, ft (m)
High
frequency
antennas
Dielectric constant
(1)
(1) A. Oil, gasoline or other hydrocarbons, and petrochemicals (
H
r
= 1.9-4.0)
In pipes or with ideal surface conditions, for some liquefied gases (
H
r
= 1.4-4.0)
B. Alcohols, concentrated acids, organic solvents, oil/water mixtures, and acetone (
H
r
= 4.0-10.0)
C. Conductive liquids, e.g. water based solutions, dilute acids, and alkalis (
H
r
> 10.0)
A B C A B C A B C
2-in. Cone/
Process seal
33 (10) 49 (15) 66 (20) 82 (25) 115 (35) 115 (35) 9.8 (3) 20 (6) 33 (10)
3-in. Cone/
Process seal
49 (15) 66 (20) 98 (30) 82 (25) 115 (35) 115 (35) 13 (4) 30 (9) 39 (12)
4-in. Cone/
Process seal
66 (20) 82 (25) 115 (35) 82 (25) 115 (35) 115 (35) 23 (7) 39 (12) 49 (15)