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
- CE mark
- RoHS
- EAC conformity
- RCM-Tick marking
- Ex approval
- Explosion-protected smartphones and tablets
- Pressure equipment with allowable pressure ≤ 200 bar (2
- EN 302729-1/2 radio standard
- FCC / Industry Canada
- Japanese Radio Law and Japanese Telecommunications Business Law Compliance
- Other standards and guidelines
- Ordering information
- Accessories
- Supplementary documentation
Micropilot FMR20
Endress+Hauser 19
Beam angle
_
2
α
W = 2 × D × tan
α
D
W
A0033201
13 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.
FMR20
Antenna size 40 mm (1.5 in) 40 mm (1.5 in)
with accessory
"flooding protection
tube"
80 mm (3 in) 80 mm (3 in)
with accessory
"flooding protection
tube"
Beam angle α 30° 12° 12°
Distance (D) Beam diameter W
3 m (9.8 ft) 1.61 m (5.28 ft) 0.63 m (2.07 ft) 0.63 m (2.1 ft)
5 m (16.4 ft) 2.68 m (8.79 ft) 1.51 m (4.95 ft) 1.05 m (3.45 ft)
10 m (33 ft) 5.36 m (17.59 ft) 2.10 m (6.90 ft) 2.1 m (6.9 ft)
15 m (49 ft) - - 3.15 m (10.34 ft)
20 m (66 ft) - - 4.2 m (13.79 ft)