Antenna Selection Guide/Measuring Range - Emerson Rosemount 5400 Series Reference Manual

Reference Manual
00809-0100-4026, Rev HA
2.6

Antenna selection guide/measuring range

The measuring range depends on the microwave frequency, antenna size, the dielectric
constant (H
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.
Table 2-2. Rosemount 5402, Maximum Recommended Measuring Range, ft (m)
High
frequency
antennas
A
2-in. Cone/
33 (10)
Process seal
3-in. Cone/
49 (15)
Process seal
4-in. Cone/
66 (20)
Process seal
(1) A. Oil, gasoline or other hydrocarbons, and petrochemicals (
In pipes or with ideal surface conditions, for some liquefied gases (
B. Alcohols, concentrated acids, organic solvents, oil/water mixtures, and acetone (
C. Conductive liquids, e.g. water based solutions, dilute acids, and alkalis (
Transmitter Overview
) of the liquid, and process conditions. A higher dielectric constant value produces a
r
A. Oil, gasoline or other hydrocarbons, and petrochemicals (H
ideal surface conditions, for some liquefied gases (H
B. Alcohols, concentrated acids, organic solvents, oil/water mixtures, and acetone
(H = 4.0-10.0).
r
C. Conductive liquids, e.g. water based solutions, dilute acids, and alkalis (H
B C
49 (15) 66 (20)
66 (20) 98 (30)
82 (25) 115 (35)
H
r
Dielectric constant
A B
82 (25) 115 (35)
82 (25) 115 (35)
82 (25) 115 (35)
= 1.9-4.0)
H
= 1.4-4.0)
r
H
= 4.0-10.0)
r
H
> 10.0)
r
Section 2: Transmitter Overview
= 1.9-4.0). In pipes or with
r
= 1.4-4.0).
r
(1)
C A
115 (35) 9.8 (3) 20 (6)
115 (35) 13 (4) 30 (9)
115 (35) 23 (7) 39 (12)
November 2014
> 10.0).
r
B C
33 (10)
39 (12)
49 (15)
15