Pay attention to the presence of disruptive influences that can affect the
liquid level measurement, such as foam, obstacles in the tank, floating
solids; problems can be avoided by performing the level measurements
in internal stillwells with minimum diameters of 130mm. The tube must
have a length greater than or equal to the distance to the empty, and
one or more vent holes to allow itself filling and emptying (Fig. 9).
1. Vent hole D5 ... 10mm (0.197 ... 0.395 in)
S425/C Ultrasonic level sensor – Data Sheet
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Fig. 8
Fig. 9
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Pagina 14