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BM-65-F Diaphragm Switch


Diaphragm switch for hazardous locations with standard .016” thick, black neoprene diaphragm, externally mounted

Pressure switch with hazardous location approvals

The BM65 provides automated point level indication of free-flowing dry materials and can be used in environments where there is a risk of combustible dust.

Need a point level indicator with Class II approvals and affordably priced?

This pressure switch is UL Class II, Groups E, F, & G explosion-proof certified. It’s ideal for high and low-level detection and detecting plugs in chutes.

Why it’s so versatile:

It can be used for level detection and process control. Models are available for internal and external mounting. Plus, a choice of a standard or heavy-duty neoprene, or heavy-duty silicon diaphragms ensure it’s adaptable to many materials.

Where to use the BM65:

  • Free-flowing dry materials with a density >20 lb./cu. ft.
  • Where hazloc approvals or certifications are required
  • Bins, silos, and some plugged chute applications
  • Material densities from 20 lb./cu. ft.
  • Agricultural storage of grain, seed, or feed
  • In operating temperatures from -40°F to +300°F

Overflow Prevention
High level alerts to avoid over-filling vessel


Material Outages
Low level alerts eliminate empty conditions


Plugged Chutes
Detect when chutes are clogged with material


Process Control
Switching relay to turn a process off or on


Conveyor Overload
Prevent jamming or damaging conveyors

More Information
Means of MeasurementPressure Switch
Measurement TypePoint Level
Voltage Up to 250 VAC
OutputsRelay SPDT
Ambient Temperature-40°F to +300°F (-40°C to +148°C)
Process TemperatureUp to +300°F (148°C)
ApprovalsCSA Class II, Groups E, F & G
Enclosure MaterialDie cast aluminum

Replacement Parts

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BM-65 Brochures

BM-65 Manuals

BM-65 Spec Drawings

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