Speed Switches

           
 

4B's line of speed switch sensors include: proximity, inductive, zero speed, stop motion and rotech encoders to monitor dangerous belt slip, underspeed or stop conditions on conveyors, bucket elevators and any other shaft driven machinery. Our non-contacting sensors can be used to detect screw conveyor flights, elevator bucket bolts and other moving ferrous targets. Speed switches can be connected to a PLC or to one of 4B’s hazard monitory systems to provide alarm and/or shutdown of your machinery when dangerous conditions are detected.

           
     
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  Whirligig and Mag-Con  

Whirligig®

   
         
   

• Fully Guarded Target for Easy Mounting of Motion Sensors

  Approvals:
   

• Universal Application - Suits All DIN Style and Industry Standard

  ATEX - Europe  CE - Europe
   

  Cylindrical Sensors

 
   

• Easy Installation - Only Requires 1/2" UNC Tapped Hole in the

 
   

  Machines Shaft or Use a Mag-Con™ for Magnetic Connection

 
   

• Available with 1, 2, 4 or 8 Targets

 
     
           
 
           
  NEW PRODUCT
           
  4B Milli-Speed 4-20 mA Output Speed Sensor  

Milli-Speed Switch

 
         
   

• 4 - 20 mA Output

  Approvals:
   

• Simple Magnetic Calibration

  CSA - USA & Canada  
   

• Loop Powered (2 Wire)

 
   

• Totally Sealed Construction (Submersible)

 
   

• Easy Installation with Whirligig® Sensor Mount

 
   

SpeedMaster™ Compatible for Accurate Testing

 
     
           
 
           
  M800 Elite Speed Switch  

M800 Elite Speed Switch

 
         
   

• Microprocessor Controlled Speed Switch

  Approvals:
   

• LED Indication

  CSA - USA & Canada ATEX - Europe  CE - Europe
   

• Non-Contacting and Fail-Safe

 
   

• Totally Sealed Construction (Submersible)

 
   

• Dual Set Points for Alarm and Shutdown

 
   

• Universal Voltage (24 - 240 VAC/VDC)

 
     
     
   
 
           
  M300 Slipswitch  

M300 Slipswitch

  Compare Speed Switches Compare Speed Switches
         
   

• Microprocessor Controlled Underspeed Monitor

  Approvals:
   

• Inductive Proximity Sensor (30 mm Diameter Housing)

  CSA - USA & Canada ATEX - Europe  CE - Europe
IECEx
   

• Single Set Point - 20% Underspeed

 
   

• 2 Wire & 5 Wire Versions

 
   

• Totally Sealed Construction (Submersible)

 
   

• Non-Contacting and Fail-Safe

 
     
           
 
           
  M100 Stopswitch  

M100 Stopswitch

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• Stopped Motion Monitor

  Approvals:
   

• Inductive Proximity Sensor

  CSA - USA & Canada ATEX - Europe  CE - Europe
   

• Single Trip Set Point

 
   

• Totally Sealed Construction (Submersible)

 
   

• Non-Contacting and Fail-Safe

 
   

 

 
     
           
 
           
  Rotech Encoder - Stainless Steel  

Rotech Rotary Shaft Encoder - Stainless Steel

   
         
   

• Heavy Duty Rotary Shaft Encoder

  Approvals:
   

• Monitor Speed, Distance, Direction, Belt Slip, Stop Condition

  CSA - USA & Canada ATEX - Europe  CE - Europe
   

• 304 or 316 Stainless Steel Construction

 
   

• Totally Self Contained (No Guards Required)

 
   

• 1 to 1,000 Pulses Per Revolution

 
   

• Intrinsically Safe Version Available

 
     
           
 
           
  Rotech Encoder - Aluminum  

Rotech Rotary Shaft Encoder - Aluminum

   
         
   

• Heavy Duty Rotary Shaft Encoder

  Approvals:
   

• Monitor Speed, Distance, Direction, Belt Slip, Stop Condition

  CSA - USA & Canada ATEX - Europe  CE - Europe
   

• Cast Aluminum Construction

 
   

• Totally Self Contained (No Guards Required)

 
   

• 1 to 1,000 Pulses Per Revolution

 
   

• Intrinsically Safe Version Available

 
     
           
 
           
  Rotech Encoder - Polypropylene  

Rotech Rotary Shaft Encoder - Polypropylene

   
         
   

• Economical Rotary Shaft Encoder

  Approvals:
   

• Monitor Speed, Distance, Direction, Belt Slip, Stop Condition

  CSA - USA & Canada ATEX - Europe  CE - Europe
   

• Polypropylene Construction

 
   

• Totally Self Contained (No Guards Required)

 
   

• 1 to 1,000 Pulses Per Revolution

 
   

• Intrinsically Safe Version Available

 
     
           
 
           
  WDA Motion Alignment Sensor  

WDA Motion Alignment Sensor

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• Magnetic Proximity Belt Speed and Belt Alignment Sensor

  Approvals:
   

• Detects Moving Steel Ferrous Targets

  CSA - USA & Canada ATEX - Europe  CE - EuropeIECEx
   

• Adjustable Sensing Range of 1 to 3 Inches

 
   

• Not Affected by Material Build Up

 
   

• Stainless Steel Construction

 
   

• High Temperature Version Available

 
     
           
 
           
  Heavy Duty Whirligig  

Whirligig® - Heavy Duty

   
         
   

• Fully Guarded Target for Easy Mounting of Motion Sensors

  Approvals:
   

• Heavy Duty - Stainless Steel Construction

  CSA - USA & Canada ATEX - Europe  CE - Europe
   

• Twin Sealed Stainless Steel Bearing

 
   

• Easy Installation - Only Requires 5/8" UNC Tapped Hole in the

 
   

  Machines Shaft