GO Switch Training Agenda

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Leverless Limit Switches

Reliability Durabilityin the most
demandingplant conditions
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GO Switch Training Agenda

• Why GO Switch is special
• Competition overview
• GO Switch products
• Square
• Round
• Power
• Where to sell them

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Our experience

• Factory Automation
• Automotive
• Cement
• Diecasting
• Steel
• Tire Rubber
• Tool Die

• Process Automation
• Biotech
• Chemical
• Food Beverage
• Hydrocarbon
• Mining
• Oil Gas
• Petrochemical
• Power
• Pulp Paper
• Water/Wastewater

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GO Switch product lineA variety of shapes,
sizes, and sensing ranges to fit most applications

• Square

10 Series Long Range
20 Series Side Sensing
30 Series End Sensing
35 Series Valve Position Sensor
80 Series DPDT
Round
71 72 3/8 dia.
73 74 5/8 dia.
75, 76 77 Long Threads
7G 7I DPDT
7L LPS BriteLite LEDs
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GO Switch product lineA variety of shapes,
sizes, and sensing ranges to fit most applications
Specialty
7A Pneumatic
SubSea Submersible to 20,000 ft.
N7 P7 Nuclear Qualified
Defender Turbine Valve Monitoring Systems
Hi-Temp to3500F/4000F
Cylinder Position Sensors
7D-7F Stroke-to-GO Probe lengths to 2.062
standard Custom lengths to 5 3,000psi pressure
rating 3600 adjustable
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GO SwitchCommon Features

• Standard temperature -40oF to 221oF
• Repeatability 0.002
• Response time 8 ms
• Dry contact
• Consume no power to operate
• No voltage drop or leakage current
• Can wire AC or DC, NO or NC
• Highest volt/current rating on the market for
  prox switch
• Simple device - Intrinsically Safe

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GO SwitchCommon Features

• Permanent magnets -1 every 100 years
• Options galore
• Stainless Steel, Epoxy, Exotic
• SPDT, DPDT, Quick Disconnect
• Explosion Proof, Hi Temp, SubSea
• Target Magnets increase sensing range
• Date coded for trace ability

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GO SwitchCommon Features

• Heavy duty dry contacts
• Excellent for both high and low loads
• Vibration resistant, high contact pressure
• Self-cleaning with wiping action
• Contact ratings are for resistive loads
• Inductive loads app 1/2 published ratings

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CompetitionTechnologies

• Mechanical Lever arm linked to the switch
  mechanism
• Solid State Electrically created magnetic field
  measures change in magnetic field to trip switch
• Reed Glass encapsulated switch mechanism
  tripped by a magnetic target
• GO is a hybrid technology that combines the
  advantages of each of the above with none of
  their drawbacks

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CompetitionLimit Switch

• A Limit Switch is an electrical mechanical device
  that that provides an electrical signal through a
  set of contacts.
• When the object to be sensed comes in contact
  with an actuator, this mechanical motion closes
  (makes) or opens (breaks) a set of contacts
• Limit Switches are often applied because
• They do not require external power
• Have a very wide voltage and current range
• Do not have leakage current
• Have a higher temperature range than solid state
  sensors
• Disadvantages
• Require contact with object to be sensed
• Limited sensing distance
• Mechanical wear

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CompetitionMechanical Limit Switches

• Lever arms bend, break and wear
• Some require up to 32 in lbs to operate
• GO is proximity - no contact, wear, torque
• Multiple moving parts to fail
• Lever arms, rollers, springs, gears
• GO has only one moving part - no metal to metal
  contact making it move
• Hole(s) with gaskets invite moisture and dust
• GO is completely potted and sealed

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CompetitionMechanical Limit Switches

• Moisture problems are common
• Contact chamber not potted
• Gasket dries, cracks, and fails
• GO is completely potted and sealed
• Repeatability is poor - lever stroke varies
• GO is repeatable to 0.002 for life
• Maintenance headache
• GO is maintenance free

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CompetitionProximity Switches

• Traditional prox switches are solid state
  devices. They use inductive sensing technology
  to detect the presence of absence of a metallic
  target
• Many shapes and sizes
• Square, rectangular, cylindrical, puck, etc
• Can be very small
• Works better in tough environments as compared to
  Photoelectrics and Limit Switches
• Low cost

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CompetitionInductive Proximity Sensors

• Solid state - consumes power to operate
• GO is dry contact - consumes no power
• Two piece construction is fragile
• GO is one piece stainless or brass
• Must stock 4 models for AC, DC, NO, NC
• GO - one model does it all
• Not explosion proof
• GO is Class I Div I all groups

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CompetitionInductive Proximity Sensors

• IS barrier brand sensitive
• GO is simple device - use any barrier
• GO hermetic seal is Non-Incendive
• Temperature sensitive - sensing varies
• GO to 400oF with stable sensing
• Many wiring precautions
• GO handles high loads - no voltage drop or
  current leakage - series or parallel

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CompetitionReed Switches

• A Reed Switch consists of two magnetic contacts
  when approached by a target magnet, attract each
  other and close a circuit.
• Contacts are contained in a gas filled glass tube
• Can be packaged in many different sized
  enclosures
• Designed to switch lower currents and can not
  handle high current loads

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CompetitionReed Switches

• Switch mechanism often unreliable
• GO is proven to 100s of millions of cycles
• Susceptible to vibration and bounce
• GO contact pressure is much greater
• Glass tube hermetic seal is fragile
• GO herm seal is virtually unbreakable
• Require magnet to operate
• GO needs only ferrous metal

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GO SwitchSquare - 10/20 Series

• The original Leverless Limit Switch
• Invented in 1950s by CR Marcum
• Workhorse of the industry
• Same operating principle today
• Simple but very clever
• Materials upgraded through the years

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10/20 Series - How it Works
Operated When a ferrous target enters the sensing
area of the switch, it diverts flux lines from
the armature to create a magnetic dominance on
the opposite side. As a result, the armature
snaps to its operated position, closing the other
contact circuit. When the target is removed the
armature snaps back to its original, unoperated
position.
Unoperated On the sensing side of the switch, one
magnet is positioned closer to the armature,
creating a dominant magnetic flux field which
draws the armature down to its unoperated
position, closing a contact circuit.
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A look inside
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GO SwitchSquare - 10/20 Series

• Two magnet design
• Magnetic bias with see-saw armature
• 3/8 Side, 9/16 Extend (10), 3 3/16 Max
• SPDT, DMDB, Latching
• 10A/120Vac, 3A/24Vdc
• Silver cadmium oxide, gold flashed
• Hi Temp to 350oF (10)
• UL, CSA, FM, SAA, MSHA
• 5 conduit positions

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80 Series - How it Works
Unoperated The armature is positioned off-center
of the magnet, creating a dominant magnetic flux
field on the sensing end of the switch which
draws the armature down to its unoperated
position, closing a contact circuit.
Operated When a ferrous target enters the sensing
area of the switch, it diverts flux lines from
the armature to create a magnetic dominance on
the opposite side. As a result, the armature
snaps to its operated position, closing the other
contact circuit. When the target is removed the
armature snaps back to its original, unoperated
position.
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A look inside

• 7. Brass, stainless steel or copper housing
  withstands physical abuse, moisture, and
  corrosives.8. Conduit outlet on bottom of
  housing for versatile installation.9. Multiple
  wiring options
• Terminal Block
• Lead Wires
• Cable
• Quick Disconnect
• 10. Consumes no power to operate and has no
  current leakage or voltage drop.

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GO SwitchSquare - 80 Series

• One magnet design
• Magnetic bias with see-saw armature
• 1/4 End Sensing, 3 1/2 Max
• SPDT, DPDT
• 10 amp/120Vac, 3 amp/24Vdc
• Silver cadmium oxide, gold flashed
• UL, CSA, FM, SAA
• 2 conduit position

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GO SwitchSquare - 35 Series

• One magnet design
• Magnetic bias with see-saw armature
• SPDT
• 4 amp/120Vac, 3 amp/24Vdc
• Hermetic seal

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70 Series - How it Works
Operated When a ferrous target enters the sensing
area of the switch, it attracts the primary
magnet, which pulls the connecting rod forward.
As a result, the common contact snaps to its
operated position, closing the other contact
circuit. When the target is removed the common
contact snaps back to its original, unoperated
position.
Unoperated The center magnet simultaneously
attracts the primary magnet and repels the bias
magnet, pushing the connecting rod backward. As a
result, the common contact rests in its
unoperated position, closing a contact circuit.
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A look inside
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GO SwitchRound - 70 Series

• The global choice on linear control valves
• 20 years of industry success
• Several look like it, none perform like it
• Unmatched durability and reliability
• 73-13528-A2 General Purpose73-13526-A2 Class I
  Div II73-13523-A2 Class I Div I

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GO SwitchRound - 70 Series

• Three magnet design
• Magnetic bias creates magnetic spring
• .100 End Sensing, 0.350 Max
• SPDT, DPDT
• 4A/120VAC, 3A/24VDC - Industry Best
• Silver palladium contacts
• Sawtooth configuration
• Hi Temp to 400oF
• UL, CSA, FM, CENELEC, SAA
• 3/8, 5/8, 3/4 diameter std sizes

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GO SwitchRound - 70 Series

• Single piece construction
• Stainless steel barstock
• Prevents moisture intrusion
• Hermetic seals and DPDT contacts available on
  7G,7H 7I
• More expensive than solid state - if they are
  working well, walk away - if not working, were in

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Cylinder Position Sensor Stroke-To-GO

• Cylinder Position Sensor
• Solid Stainless Steel
• Competition has plastic or ceramic sensing face
• 3,000 psi working and 12,000 psi burst41 Safety
  Factor
• Bi-color LED indicates position
• 360o adjustable head

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Stroke-To-GO - How it Works
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A look inside
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GO SwitchApplications

• Explosive Areas
• Mechanical often increases size of switch
• Solid State not available
• GO Switch leads with global approvals
• UL, CSA, FM, CENELEC, SAA,MSHA
• Class I Div I all groups
• Zone 0, Zone 1, Zone 2
• ATEX Certified (Selected 70 Series Models)

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GO SwitchApplications

• Hostile Conditions
• Caustic chemicals
• Corrosive liquids - salt water
• Coal, coke, cement, or other dust
• High pressure wash down, steam leaks
• GO Switch is the choice
• Stainless steel housings
• Epoxy/Exotic coatings

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GO SwitchApplications

• Temperature Extremes
• Mechanical -20oF to 250oF
• Solid State 0oF to 158oF
• Reed Switch -40oF to 220oF
• GO Switch -40oF to 400oF
• Cold NASA -200oF, Syncrude -122oF
• Heat only GO can go above 250oF

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GO SwitchApplications

• Underwater Applications
• Mechanical not a chanceSolid State not
  realisticallyReed Switch rely on a reed
  underwater?
• GO Switch is often the only real solution
  Depths to 21,277 feet sea water Valves, locks,
  sleuth gates, military SubSea connector on
  10/20, 70, 80

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GO SwitchApplications

• Unusual Applications
• Short stroke globe valves
• Valve stem b/t QT valve and actuator
• Safety showers
• Security areas
• Wherever reliability is critical
• GO Switch has so many models that there is always
  a solution

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GO SwitchPower Products - Defender

• Turbine Trip Valve Position Monitor
• Westinghouse turbines 100 Mega Watts
• Drop-in replacement
• One Defender per valve
• 8-18 trip valves per turbine
• Throttle
• Governor
• Reheat
• Reheat Stop
• Intercept

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Before
After
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GO SwitchPower Products - NuProx

• Nuclear Qualified Proximity Switch
• CANDU Qualified for containment
• 1/3 the size of Namco
• Eliminates torque to operate
• SPDT
• 1 amp _at_ 48Vdc

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GO SwitchWhere to Sell Them

• Power Generation
• Refining
• Oil Gas
• Chemical
• Pulp Paper
• Food Beverage
• Pharmaceutical
• Water Wastewater
• Off Shore

• Automotive
• Tire Rubber
• Mining
• Railroad
• Cement
• Steel Aluminum
• Glass
• Transportation

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GO SwitchWhere to Sell Them
Hot
Dirty
Wet
Cold
Corrosive
Abusive
Explosive
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www.goswitch.com
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GO Switch FastTrack DeliveryStandard items most
likely to be in stock
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Leverless Limit Switches

Reliability Durabilityin the most
demandingplant conditions