Category : Instrumentations for fluid management, control and transfer (gas and liquids) > Level sensors, detection & measurement

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SDS/PP
-for the automatic control of non-aggressive liquids in open or
non-pressurized tanks
This pneumatic level switch is suitable for maximum alarm or the switching of pumps or
solenoid valves.

The connection head contains a diaphragm pressure switch with changeover contact.
Switching is effected by the air pressure rising in the air tube as the liquid level rises. After
a fall in pressure of about 45 mm WG the contact is broken again. Level differences of more
than 45 mm can be controlled by using two SDS units.

With the passage of time, air escapes through the diaphragm. For this reason the tube should
be recharged with air every 6-8 weeks.

Tube material PP
Tube diameter max. 16 mm
Tube length min. 110 mm
Tube length max. 1,500 mm
Screw-in nipple material PP
Screw-in nippel dimension G½
Connection head made of PP,
62 mm dia. x 70 mm high,
protection class IP 55, cable entry Pg 9

Mounting orientation vertical
Mounting from the top
Temperature resistance + 1° C to + 70° C

Contact diaphragm pressure switch, changeover switch

Pressure resistance of the membrane max. 0.8 bar (8 m WG)

Membrane material FPM
Switching voltage AC max. 250 V
Switching current AC max. 4 A
Switching capacity AC max. 500 VA
ON switching point
(measured from the lower edge of the probe tube) 105 mm
OFF switching point
(measured from the lower edge of the probe tube) 60 mm

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List of all articles in this sub-category Level sensors, detection & measurement

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