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Condition Monitored / Fault Detected:

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Condition Monitored / Fault Detected
           
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   Electrical Faults / Condition       Instrument or recorder is capable of detecting electrical faults in circuit breakers, switches, relays, transformers, motors, generators, distribution panels, switchgear, switchboards, or electrical systems or circuits for electrical power transmission or distribution. Electrical faults can include short circuits, ground faults, high impedance faults (HIF), phase faults, asymmetric faults, overload conditions, power deficits and power excesses. Arcs, discharges or other electrical faults that can produce an audible or ultrasonic noise (hum or buzz), as well as visible or UV light emission, can be detected by sound microphones, ultrasonic transducers, acoustic emission sensors, or UV sensors. Electrical faults at lower amperage can produce thermal emissions, which can be detected with optical infrared sensors. Many electrical faults can be detected by monitoring circuits for changes in phase current, phase voltage, power direction, current zero sequence, frequency changes, and temperature.  
   Mechanical Faults / Machine Condition       Instrument or recorder is capable of detecting mechanical faults or monitoring the machine condition of rotating mechanical systems or system critical components such as bearings, couplings, shafts, gears, transmission, belts, pulleys, slides, guides, motors, actuators, or other mechanical parts or mechanisms.  Acoustic emission instruments can to monitor conditions and detect changes in mechanical systems. Mechanical components and fault produce specific acoustic or vibrational responses. Changes in the acoustic emission or spectrum can indicate a fault or deteriorating condition. For example, if a break, deformation or other failure occurs, acoustic emission (AE) sensors can detect the burst of high frequency caused by the event. 
   Process Faults / Condition       Instrument or recorder is capable of detecting process faults or monitoring the condition of process systems or critical system components such as valves, pumps, pressure vessels, piping, pipe fittings, tanks, mixers, or other process parts or equipment. Acoustic emission instruments can monitor conditions and detect changes in process systems. For example if a break, leak, blockage, deformation, or other failure occurs, acoustic emission (AE) sensors can detect the burst of high frequency caused by the event. Monitoring acoustic emissions can also access the location and severity. This NDT technique is particularly useful in determining the structural adequacy of tanks and pressure vessels. AE is also used for the detection of faults or leakage in pressure vessels, tanks, and piping systems. Welds and stress corrosion cracking can be monitored on-line with AE techniques. 
   Other       Instrument or recorder is capable of detecting specialized faults beyond the common electrical, mechanical or process faults. 
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Instrument Type / Technology
   Technology:       
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   Acoustic Emission       Acoustic emission instruments are designed to monitor conditions and detect changes in mechanical, electrical and process systems. In electrical power distribution systems, they are used to detect shorting or arcing. In mechanical systems, flaws also provide specific acoustic or vibrational responses. For example, if a break, deformation or other failure occurs, acoustic emission (AE) sensors can detect the burst of high frequency caused by the event. Continuous acoustic emissions are associated with dislocation movement and the resulting strain or deformation. Bursts or short pulses of acoustic emissions signals are produced by micro-yielding, twinning, and crack formation. Melting, phase transformation, thermal stresses, fiber breakage and fiber-matrix debonding in composites also result in acoustic emissions.    Monitoring acoustic emissions can also access the location and severity. This NDT technique is particularly useful in determining the structural adequacy of tanks and pressure vessels.  AE is also used for the detection of faults or leakage in pressure vessels, tanks, and piping systems. Welds and stress corrosion cracking can be monitored on-line with AE techniques. 
   Air / Structure Borne       Air and structure-borne detection methods are used to detect faults in electrical and mechanical system based on the detection of acoustic signals. These signals can be airborne, travel through the air, or reside only within a solid structure or mechanical system.  There are many applications for air or structure-borne ultrasonic detection or inspection methods. Examples include: 
  • Access Door or Hatch Leaks
  • Bearings
  • Chillers, Air Conditioners and Cooling Systems
  • Circuit Breakers, Fuses and Switches
  • Compressed Air Leaks
  • Distillation Columns
  • Electrical Systems (Arcing, Corona or Tracking)
  • Gears and Gear Boxes
  • Heat Exchanger, Boiler, and Condenser Leaks
  • Mechanical Systems
  • Motors
  • Pump Cavitation
  • Specialty Gas Systems
  • Steam Traps
  • Switchgear, Busbar, Busways and Panel boards
  • Tanks, Tubing, Hose and Pipes Leaks
  • Under or Over Lubrication 
  • Vacuum System Leaks
  • Valve Leaks
  • Water Leaks
  • Wind Noise
 
   Eddy Current / Electromagnetic       Eddy current, penetrating radar, and other electromagnetic techniques are used to detect or measure flaws, bond or weld integrity, thickness, and electrical conductivity, and to detect the presence of rebar or metals. Eddy current is the most widely applied electromagnetic NDT technique. This method is also useful in sorting alloys and verifying heat treatment.  Eddy current testing uses an electromagnet to induce an eddy current in a conductive sample. The response of the material to the induced current is sensed. Since the probe does not have to contact the work surface, eddy current testing is useful on rough surfaces or surfaces with wet films or coatings. 
   Optical / Laser       Optical-based NDT instruments use techniques such as laser shearography, magneto-optical methods, and holographic interferometry to detect flaws and residual stress, or to measure thickness. 
   Ultrasonic       Ultrasonic (UT) inspection techniques are used to detect surface and subsurface flaws, or to measure thickness. Beams of high frequency acoustic energy are introduced into the material and subsequently retrieved. Distance calculations are based on the speed of sound through the material under evaluation. The most widely used of all UT techniques is the pulse-echo technique. Flaws are detected and sizes estimated by comparing the amplitude of a reflected echo from an interface (flaw or back surface) with that of a reference interface of known size. 
   Other       Other unlisted nondestructive techniques or technologies. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Form Factor:       
   Your choices are...         
   Bench / Rack / Cabinet       Devices are designed to sit atop a bench or desktop, or be mounted in a rack or cabinet. 
   Portable / Hand Held / Mobile       Devices are portable, hand held, or mobile. 
   Monitoring System       Devices are monitors or monitoring systems used to continuously detect or measure flaws, thickness, or corrosion. 
   Other       Other unlisted or proprietary form factors. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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