The level indicator observes the filling level as a limit switch in silos and vessels. It can be used as a full and empty indicator for dusty and powdery, granulated and grainy bulk goods with a maximum grain size up to 100 mm and with a bulk density of 0.3 to 3 t/m3.

The models are certificated for use in potentially explosive Dust and Gas atmospheres as well as in hybride mixtures (Dust + Gas) hazardous areas.

The cone sensor must to be exposed to the material. The bulk goods, being dumped beside the pendulum, move the pendulum more aside as the filling level increases. This movement, approximetly 10 o of the rod- sensor, activates the switch for the full indication.

When the filling level falls, the pendulum moves back in the vertical position and the switch is disengaged.

The models have a regulation system by a spring that allows the adjusment of the sensitivity. Tightening the regulation nut to reduce the sensitivity and increase the strain of the material to activate the microswitch. Clockwise insensitive.

Drill 4 holes in the top of the silo or vessel and mount the indicator using screws, rods, fasteners or nuts M6 making sure of the verical position of the rod.


Approximate measures given in mm.

Technical data

NamePendulum level indicator
TypeMS-1... – ref: 2305-A-...
B1 DustATEX II 1/2D Ex ta/tb IIIC T80 °C Da/Db
B5 Gas+DustATEX II 1/2D Ex ta/tb IIIC T80 °C Da/Db
ATEX 2G Ex ib IIB T6 Gb
Rod lengthStandard 500 mm
(Other lengths under request)
Product density0,3 t/m3 – 3 t/m3
Maximum pressure+0,5 bar
Cable entryM20x1,5
Switching voltage24 V – 250 V AC
o 12 V – 125 V DC
Switching function1 NO + 1 NC
Capacity of the contact:
B1 15 A / 250 V AC (for resistive loads)
For inductive or capacitive loads
B5Uo < 30 V DC; Ii < 100 mA
Bulk good temperature-25° C – +80° C
Ambient temperature-20° C – +70° C
ProtectionIP66 according to DIN EN60529
Weight1,15 Kg depending on the model
HousingAluminium, RAL 7001 coated
(Under request Stainless Steel)
(Under request Stainless Steel)
Folding bellowNBR
Cable glandNiquel-plated Brass

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