Mechanical Rotary Level Indicator

The BMR-100 rotary sends a signal to your warning light or horn indicating a full or empty bin.

Preventing the Overfilling of Bins and Eliminating Dry Runs in Processing Operations

The BMR-100 rotary can be wired to a light or horn to alert when levels in a bin are either empty or high.

Simple, Electromechanical Measurement for Ordinary Storage and Processing Operations

  • Mining: Sand, aggregate, gravel, and coal storage and surge bins.
  • Agriculture: Bins holding grain, feed, fertilizer, seed or bulk ingredients.
  • Plastics: Detect the level of plastic pellets in hoppers or silos.
  • Construction: Concrete and cement batch plants and silos of roofing granules. 

Accessories for the BMR-100 

  • Mounting plates: Carbon and stainless-steel choices in 0° 10°, 20° and 30° angles for mounting on top of sloped roofs.
  • Paddles: Users can select from 19 different styles for heavy, medium and light bulk solid materials. Collapsible paddles are present for installation with entering the vessel.
  • Point level alarm panel: Provides vessel level conditions through a blinking light and audible alarm with up to 24 level indicator stations.
  • Adjustable top mount: The high-level threshold can be changed using the adjustable coupling that can be moved up and down a 72” shaft.
  • Quick disconnect: Hardwiring can be replaced to make it simple to install and remove the rotary for maintenance, cleaning or replacement. 


  • Material density from 2 lb/cu ft to over 100 lb/cu ft
  • Strategic mounting can be achieved on bins, chutes, silos and conveyors
  • High, demand and empty level warning for processing vessels
  • Plastic pellets and granules used by molders and packaging manufacturers
  • Point level detection of bulk solids such as pellets, powders and granules
  • Feed, grain, seed and food storage and processing
  • Sand, coal, gravel, concrete, aggregates and mining sites 


  • 115 VAC voltage
  • Simple, mechanical architecture
  • SPDT relay output, 250 VAC, 10 Amp
  • Can be interchanged with other rotaries
  • Two ¾” conduit entrances
  • Easy access screw-off cover
  • Aluminum cast housing with powder-coated finish 


  • Ambient operating temperature: −40 °F to +185 °F (−40 °C to +85 °C)
  • Power requirements: 115 VAC
  • Output contacts: SPDT 10 Amp, 250 VAC
  • Process temperature: −40 °F to +250 °F (−40 °C to +121 °C)
  • Enclosure type: NEMA 4X, 5, 7, 9 and 12
  • Mounting: 1–1/4” NPT
  • Conduit connections: 3/4” NPT
  • Shaft: Stainless steel
  • Enclosure: Die-cast aluminum, powder coat finish

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