Edmar Metric LLC

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Membrane level control for powders or granules materials


The SM85 is a simple and economical instrument suitable for the minimum and maximum level control inside silos or hoppers that contain no sticky materials, powders or granules like rice, corns, plastics, coffee, sand, lime, etc.

Working is very simple: the pressure practiced by material on membrane activates a trigger. Trigger sensibility is adjustable by a screw placed on the instrument tap. 

Humidity and temperature variations do not affect working, the membrane is collision and vibration proof.

• SM85 for the control of the level of powders or granules in absence of fuel dust.

• SM85.ATEX for the level control of materials, where, inside (process zone 20) or outside the tanks (Environment zone 21) a potentially explosive atmosphere, like dust cloud, can be present.


• Shock proof and self-extinguishing plastic case with aluminum fixing flange

• 82 mm. dia. non-toxic black rubber membrane; the ATEX-version is in antistatic silicone rubber

• Response sensibility: 50 gr min. in the middle, 20 mm. water pressure on membrane