Diaphragm Switch for Hazardous Locations

Model: BM65

The BM65 provides automatic point level indication of free-flowing dry materials and can be used in environments where there is a risk of combustible dust. UL Class II, Groups E, F, & G explosion-proof certified, this diaphgragm switch for hazardous locations can be installed to detect high, intermediate, and low levels. The BM65 offers both internal and external mounting options and the choice of a standard neoprene diaphragm, a heavy-duty neoprene diaphragm, or a heavy-duty silicon diaphragm to make it adaptable to a variety of materials.

How to Wire a Diaphragm Switch to a Light
Learn how to wire a diaphragm switch point level indicator to a light to alert to a full or empty bin or silo. Use it as an high level to alert you when the bin is full or a low level when the bin is empty. Know when your grain bins are full and prevent overfilling.
Standard Diaphragm Video
Standard Diaphragm
  • Reliable point level detection for free flowing dry materials
  • Used in bins, vessels and some plugged chute applications
  • Material density from 20 lb./cu. ft.
  • Feed, seed, grain, food, rubber, plastics, light powders, granules and many other materials
  • Hazloc approval Class II
  • Die-cast aluminum housing
  • Rugged construction and simple design
  • Very economical point level detection
  • Neoprene or silicone diaphragm material
  • Internal or external mount
  • Multiple voltages

Switch Ratings: 15 Amps @125 or 250, 1/8 HP @ 125 VAC, ¼ HP @ 250 VAC, 1/2 Amp @ 125 VDC, 1/4 Amp @ 250 VDC

Operating Temp: -40°F to +300°F (-40°C to +149°C)

Approvals & Certifications: Listed for Class II, Groups E, F & G Hazardous Locations

Enclosure Type: Die cast aluminum

Housing Enclosure: Die cast aluminum

Mounting: Internal or external, 16 gauge galvanized mounting plate