Micropilot FMR50
42 Endress+Hauser
Horn antenna with mounting bracket (FMR50)
A0016865
23 Mounting the horn antenna with a mounting bracket
Using the mounting bracket, position the antenna so that it is perpendicular to the product surface.
NOTICE
There is no conductive connection between the mounting bracket and transmitter housing.
Risk of electrostatic charge.
‣
Integrate the mounting bracket in the local potential equalization system.
Measurement from the outside through plastic walls (FMR50/FMR51)
• Dielectric constant of the medium: ε
r
> 10
• If possible use an antenna 100 mm (4 in).
• The distance from the tip of the antenna to the tank should be approx. 100 mm (4 in).
• If possible, avoid installation positions in which condensate or buildup can form between the
antenna and the vessel.
• In the case of outdoor installations, ensure that the area between the antenna and the tank is
protected from the weather.
• Do not install any fittings or attachments between the antenna and the tank that could reflect the
signal.
Suitable thickness of the tank ceiling:
Penetrated material PE PTFE PP Plexiglass
ε
r
2.3 2.1 2.3 3.1
Optimum thickness 3.8 mm (0.15 in) 4.0 mm (0.16 in) 3.8 mm (0.15 in) 3.3 mm (0.13 in)
Other values for the thickness are multiples of the values listed (e.g. PE: 7.6 mm (0.3 in), 11.4 mm (0.45 in)
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