MRG
MRG
MRG
MRG----10
10
10
10
Mechanical Installation
Mechanical Installation
Mechanical Installation
Mechanical Installation
2-2
2.1.2 Rod antenna
Mounting position
Do not mount the transmitter at the
center of the tank or too close to the tank
wall as this may reduce the measuring
range or accuracy and make the
transmitter more sensitive to echo
disturbances. We recommend that the
transmitter be mounted so that the
antenna tip is located at least 0.6m from
the tank wall.
Socket requirements
There are 2 inactive zone lengths
(100mm
and
250mm).
Noise
reflections from the nozzle are avoided in
these zones. Nozzle height must be
less than the antenna extension.
Free space requirements
The transmitter should be mounted so that no obstacles are present in the radar beam. Obstacles in the
radar beam may reduce the measuring range.
2.1.3 Key factors for measurement
1. The strength of the microwave reflection from the liquid surface is proportional to the dielectric constant
Er (Epsilon) of the target fluid. The higher the fluid’s dielectric constant, the wider the measurable range.
2. A larger antenna enables more stable measurement and a wider measuring range.
3. Compared to calm fluid surfaces, measuring ranges of turbulent surfaces are reduced due to poorer
reflection.
4. Deposit buildup on the antenna, foaming on liquid surfaces, powder granules in air suspension and
other interior tank conditions may affect measuring range and performance.
5. Obstructions in the microwave radiating area or target fluid surface areas less than the radiating area
will reduce microwave reflection and decrease and narrow the measurable range.
Inactive Zone
NPT 1 1/2
Height of nozzle
10mm or more
