Type 8137

8 | 12

Visit product website 

5.

Performance specifications

5.1. Measurement deviation diagram

[mm]

[m]

Recommended measuring range

Antenna edge

Reference plane

Measuring range

0.5

10

2

-2

-10

10

Blocking distance

0

6.

Product operation

6.1. Measuring principle

The radar measuring device consists of an electronic housing, a process connection element with antenna and a sensor. The antenna

emits short radar pulses with a duration of approximate 1 ns to the medium. These pulses are reflected by the medium surface and

received by the antenna as echoes. Radar waves travel at the speed of light. The running time of the radar pulses from emission to

reception is proportional to the distance and hence to the level. The determined level is converted into an output signal and transmit-

ted as a measured value.

The measuring range of the radar level measuring device begins physically at the end of the antenna. However, the min./max. adjust-

ment begins at the reference plane. The position of the reference plane depends on the sensor version.

• Version with thread and horn antenna: the reference plane is the sealing surface on the hexagon.

• Version with flange and horn antenna: the reference plane is the lower side of the flange.

Reference plane

Version with thread

and horn antenna

Version with flange

and horn antenna