Rotary level switch

Suitable for granulates and powders

R 1”½ (DIN 2999) threaded connection

SPDT relay output

IP66 (EN 60529) protection

Power supply 24Vdc, or 24Vdc, or 115Vac or 230Vac

ATEX certified


MLS1 allows to control the level thresholds of products in powder or granules by means of a rotating blade. Typical applications are the protection of overflow or the control of lack of product (flour, cereals, milk powder, sand, cement, plastic or organic granules, etc.).

Additional information

IP rating

IP 66 (EN 60529), NEMA 4

Process connection

R 1½” (DIN 2999)

Housing material

Aluminum with epoxy paint


Teflon-coated special bearing


NBR for radial stem seal

Transmission protection

Friction for compensation of mechanical strokes of the blade

Blade rotation speed

1 rpm

Signal delay

From absence to product presence 1s
From product presence to absence 0.2s


1.2Kg approx

Power supply

24Vac, o 115Vac o 230Vac ±15%; 50/60Hz; 24Vdc ±15%


AC max. 4VA
DC max. 2.5W

Cable gland


SPDT relay output

Max. 250Vac, 5A not inductive
Max. 30Vdc, 3A not inductive

Housing temperature range

-20° ÷ +60°C

Process temperature range

-25° ÷ +80°C

Process pressure

Max. 0.8bar

Min. powder density

> 100 g/l

Solid grain size

< 50mm

Permissible load at rod end

Max. 300N (with L=150mm)
Max. 60N (with L=500)


ATEX II 1/2D Ex Td a20/21 e
FM DIP CI. II, III Div. 1 Gr. E, F, G

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