Installation Instructions
Table Of Contents
- Table of contents
- Important document information
- Terms and abbreviations
- Registered trademarks
- Product life cycle
- Measuring principle
- Input
- Output
- Electrical connection
- Performance characteristics
- Installation
- Environment
- Process
- Mechanical construction
- Operability
- Certificates and approvals
- Ordering information
- Accessories
- Supplementary documentation
Micropilot FMR10
Endress+Hauser 17
Beam angle
_
2
α
W = 2 × D × tan
α
D
W
A0033201
9 Relationship between beam angle α, distance D and beam diameter W
The beam angle is defined as the angle α, at which the power density of the radar waves reaches half
the value of the maximum power density (3dB width). Microwaves are also emitted outside the
signal beam and can be reflected off interfering installations.
Beam diameter W as a function of beam angle α and distance D.
FMR10
Antenna size 40 mm (1.5 in) 40 mm (1.5 in)
with accessory
"flooding protection tube"
Beam angle α 30° 12°
Distance (D) Beam diameter W
3 m (9.8 ft) 1.61 m (5.28 ft) 0.63 m (2.07 ft)
5 m (16.4 ft) 2.68 m (8.79 ft) 1.51 m (4.95 ft)
8 m (26.25 ft) - 1.68 m (5.52 ft)