BM-25 Diaphragm Switch: Point Level Detector for Bins and Chutes

The BM-25 diaphragm switch is a high or low-level alert pressure switch for bins containing non-hazardous, free-flowing dry materials.

Need an Inexpensive Level Switch? Want to Know When Bins are Full or Empty?

The BM-25 diaphragm switches can help reduce overfilling and stop important grains and fertilizer from being wasted. With the help of the BM-25 diaphragm switch, users can recognize whether chutes or conveyors are clogged without making a mess.

How it Works:

When material meets the level of the switch in the bin, a sensitive microswitch is activated, which is how a diaphragm (or pressure) switch works. It provides a high-, medium- or low-level warning that may be used to start or stop a procedure.

What to Use the BM-25 for:


  • Material density from 20 lb./cu. ft
  • Monitoring levels of dry, free flowing materials
  • Installation in ordinary locations
  • Detect plugging of chutes or conveyors
  • Eliminate overflow or maintain a certain level of material
  • Levels of grain, feed, or fertilizer
  • Point level detection in bins and silos

The BM-25 is ideal for agriculture cooperatives, farmers, or any business storing dry bulk solids.


Use this Pressure Switch in Many Materials

  • Wheat, barley, corn, soybeans, or milo
  • Crops that produce nuts like sesame, sunflower, or peanuts
  • Agricultural chemicals in granular form and dry fertilizer
  • Sawdust, pieces, or pellets of wood
  • Alumina, bentonite, or potash in powder form
  • Resin pellets or plastic and rubber beads, ground
  • Landscape supplies
  • Foodstuffs such as sugar beets, rice, wheat, or oats


Features of this Reliable Point Level Switch


  • Internal or external mounting
  • Economical point level detection
  • Pressure sensing operation
  • Material for a silicone diaphragm
  • Robust design and simple construction
  • Nylon housing


Specifications Users Need to Know About the BM-25

  • Output: Switch contact closure
  • Mounting: Internal or external
  • Diaphragm Material: Silicone
  • Operating Temperature: −40 °F to +185 °F (−40 °C to +85 °C)
  • Switch Ratings: 250 VAC, 15 A
  • Enclosure Material: Nylon
  • Wire Entry: ½” NPT

Other Equipment by this Supplier

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.