Siemens SITRANS L Application Examples - Page 6

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Advantages

Signal to noise is improved in a stilling well.

• Signal strength is extremely high over the entire measurement range since no beam

spreading losses can occur in the stilling well.

• Material surfaces that would reflect poorly without the stilling well can be measured

reliably within the stilling well.

Example

The following example shows two echo profiles, both from a 25GHz radar device with a

2" horn antenna. The pink profile shows the use of a 2" diameter stilling well, and the

blue profile represents open space. The following observations can be made about the

stilling well profile:

• The echo from the target is significantly larger.

• Multiple echoes are larger and continue for a longer time. This is not a problem, as

the first echo algorithm component of the Process Intelligence signal processing will

select the first echo.

Using SITRANS LR in a Stilling Well

Application examples, 04/2020, AG070814