HONEYWELL EXD-AR-3 Explosion Proof Rotary Roller Limit Switch

Description

HONEYWELL EXD-AR-3 Explosion Proof Rotary Roller Limit Switch

Product Dimensions：

The Honeywell EXD-AR-3 is a compact, heavy-duty Explosion-Proof Limit Switch from Honeywell’s renowned MICRO SWITCH™ EX Series. It features the smallest UL-listed housing for use in hazardous locations and is specifically designed to handle high electrical loads while operating safely in explosive gas or dust environments.

Product Detailed Description

The EXD-AR-3 utilizes a Side Rotary actuator (roller lever) and a Double-Pole Double-Throw (DPDT / 2NO + 2NC) contact configuration. Inside its rugged aluminum housing, internal flame paths cool exploding gases below the ignition temperature before they can reach hazardous atmosphere outside the switch.

The “-3” suffix indicates that this unit comes pre-wired with a 3-foot (approx. 0.9 m) heavy-duty cable lead, making field connections straightforward without needing to wire directly inside the flameproof chamber.

Technical Parameters

Product Advantages

• Compact Flameproof Housing: Offers the smallest footprint among UL-listed hazardous location switches, allowing easy fit in cramped or high-density machinery layouts.
• 4-Way Flexible Mounting: Built with mounting holes on all four sides of the housing for maximum physical installation flexibility.
• 360° Adjustable Roller Lever: The side rotary arm can be rotated and locked anywhere across 360 degrees, simplifying actuation setup.
• Pre-wired Convenience: Features factory-sealed 3-foot wire leads, saving installation time and reducing human error associated with field conduit sealing.
• Non-Sparking Actuator Options: Uses non-sparking roller materials to prevent mechanical sparks during lever operation.

Important Considerations & Precautions

• Safety Appliance Warning: Do not use this switch as a primary Emergency Stop or safety interlock device where failure could directly result in severe personal injury.
• Conduit Sealing Rules: Although the unit comes pre-leaded, ensure the incoming conduit connections comply with local NEC/CEC explosive environment wiring standards (e.g., proper sealing fittings within required distances).
• Do Not Modify the Flame Paths: Never scrape, sand, or alter the precision-machined cover surfaces. Damaging the metal mating faces compromises its flame-containment capability.
• Electrical Load Limits: Ensure inductive loads (like solenoid valves) do not exceed the 10 A rating, or install external contact protection to prevent arcing and premature contact degradation.

Product Applications

The EXD-AR-3 is widely deployed in hazardous, volatile, or explosive environments:

• Petroleum & Chemical Plants: Position sensing on valve actuators, pump strokes, and pressure relief systems.
• Grain Handling & Food Processing: Limit detection on conveyors, bucket elevators, and silos where explosive dust (Group E/F/G) is present.
• Paint Spray Booths: Door interlocks and conveyor positioning in flammable vapor atmospheres (Group C/D).
• Fuel Dispensing & Refineries: Position monitoring on fuel loading arms and hazardous fluid transport systems.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

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