NSS How it WorksSensor disc is attached to rotating shaft that is being monitoredSensor disc has magnets in it that creates an alternating magnetic fieldSensor is mounted across from disc and detects magnetic field changes as a frequency
NSS How it WorksThe switch decodes the magnetic frequency signal to calculate a rotation speed in RPMThe switch compares the present speed to that of the set pointSwitch is activated according to set up for under speed, over speed, or no speed
NSSTwo ranges: 10 to 100 RPM and 100 to 5000 RPMSet point can be set anywhere in the rangeSPDT switch rated 5A @ 115 VACTemperature Limits: -40 to 140°F (-40 to 60°C)Comes pre-wired with 12” (30.5 cm) of 18 AWG
Non-Contact vs ContactThe sensor is not connected to the rotating shaft No worries about bearings to wear out No mechanical linkages to wear out or break Easier to install then direct couple types as alignment is not as critical
NSSMMetal housingExplosion-proofUL pendingCan come in kit with disc or with disc separate
NSSPPlastic housingNEMA 4XDisc comes separately
NSS ApplicationsDrive trainsCrushersBelt conveyorsBucket elevatorsExhaust fansScrew conveyorsTail pulleysLooking for belt breaks, slippage, clogs, overloads, failures
Turbine ProtectionApplication: Westinghouse AC Vertical 2900 KW GeneratorProblem: Shaft (300 rpm) for Electric Grid TransferCustomer: Duke Energy – Gaston Shoals, SC
Turbine ProtectionApplication: General Electric 1798 KW AC Vertical GeneratorProblem: Shaft (300 rpm) for Electric Grid TransferCustomer: Duke Energy – Gaston Shoals, SC
Coal Feed – Ratio Metric Conveyor Precise coal feed control to furnace Protect against feeder clogging Protect against machine failure Maintain operational efficiency
Coal & Ash Conveyor Monitoring Belt breakage or slippage detection Conveyor slow-down or stoppage Under/over speed detection
Boiler Feed-Water Pump Protection Protect high service pump shafts from shaft reversal Avoid costly equipment damage caused by reverse water flow Rugged & reliable system Easy installation & set up Cost effective pump protection
Screw ConveyorApplication: Screw Conveyor – Harsh environmentProblem: Detect slow-down or zero speed of conveyorCustomer: Industrial Grain Processor
Rotary AirlockApplication: Rotary air lock – Harsh environmentProblem: Detect slow-down or zero speedCustomer: Industrial application
Industrial MixerApplication: Industrial Mixer – Harsh environmentProblem: Detect slow-down or zero speed
Bucket ElevatorApplication: Grain - Bucket ElevatorProblem: Conveyor slow-down. Prevent possible spark/explosion or product wasteCustomer: Grain/Feed/Ethanol facility
Blower MonitoringApplication: Industrial heat treating machinery – Blower monitoringProblem: If belt breaks or motor stops toxic fumes build up – possible fire hazardCustomer: Industrial heat treating oven OEM and/or end user
Oven Fan & ConveyorApplication: Mesh Belt FurnaceProblem: Conveyor & fan speed detectionCustomer: Surface Combustion – Oven OEM
Heat TreatingApplication: Monitor motor shaft speedProblem: Maintain Consistent conveyor speed and air flowCustomer: Thermal systems – Heat treating/drying
Conveyor SpeedApplication: Municipal Treatment Conveyor Speed monitoringProblem: Speed change can cause material backup and systems damageCustomer: City waster water treatment facility
MixerApplication: Material Processing Mixer - Agitator Speed ControlProblem: Varying material volume requires varying agitation speed SensorCustomer: Mixer/centrifuge OEM & user
Conveyor Protection – Slow Down/Zero Speed•Applications: Grain/Feed, Cement/Aggregate, Mining,Packing, Paper, Textile, etc. •Senses belt slippage, slow-down and/or zero speed •Simple, low-cost machine protection •Provides early warning & prediction maintenance •Increased efficiency, increased productivity, reduced down-time, etc.
Automobile ConveyorApplication: Fixtured chain conveyors for controlling linespeed on automotive assembly lines.Problem: Conveyor over speed (a.k.a. runaway orbreak away speed) can cause chassis collision,possibly causing severe damage and/or injury.
Rock QuarryApplication: Rock quarry and/or cement plantProblem: Conveyor slow-down. Possible spark & Explosion, and or loss of production
QuestionsTo order a free catalog or for more information contact; Dwyer Instruments, Inc., P.O. Box 373, Michigan City, IN., 46361 Telephone: (800) 872-9141 or (219) 879-8000 Fax: (219) 872-9057 Internet address: www.dwyer-inst.com E-mail: firstname.lastname@example.org
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