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Eddy Current
Our online guide to instrument guides.

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On This Page
I - Hocking Instruments
Autosigma 3000
Autosigma 2000
Phasec D60
Phasec 1.1 SD
Phasec 2200
II - Hocking Probes
III - Hocking Wheelscan IV - Automatic Eddy Current Aircraft Wheel Inspection
More Pages
Ultrasonic Gauges
Coating Gauges
Ultrasonic Calibration Blocks
Flaw Detectors
Eddy Current
Ultrasonic Flaw Detectors
Ultrasonic Calibration Blocks
Dye Penetrants
Magnetic Particle Testers
Predictive Maintenance
Ultrasonic Leak Testers
Vibration Products
Surface Roughness Detectors
Metal Identification
Portable Spectrographs
Bargain Instruments
Reconditioned, demo, new
I - Hocking Instruments
Autosigma 3000
The New AUTOSIGMA 3000 is a small, simple-to-use instrument that offers full size instrument performance and user preferred features, in a small handheld package. The AUTOSIGMA 3000 has the quality, dependability, and durability that you expect from HOCKING NDT instruments.

Capabilities Include:
  • Automatic Lift-off Compensation (up to 0.020 inches of coating).
  • Simple Menu Structure
  • High Shielded Probes Minimize Edge Effect.
  • Temperature Corrected Readings
  • Field Exchangeable Probes
  • Two Frequency Operation
  • 0.8 to 110% IACS Conductivity Range
  • RS-232 Serial Interface
  • Internal Datalogger Memory (DL version only)
AutoSigma 2000
The AUTOSIGMA 2000 is an electrical conductivity meter that can quickly and easily sort non-magnetic metals and detect changes in material grade or heat treatment. The AUTOSIGMA 2000 is a full function portable instrument with simple operation, automatic calibration, alarms, data collection, and RS-232 communication.

Capabilities Include:

  • Wide conductivity range
  • (0.8% to 110% IACS).
  • Measurement accuracy to 0.1% IACS.
  • Readings are temperature corrected to 20° C.
  • Automatic lift-off compensation to 0.030".
  • Simple two step procedure for calibration and lift-off compensation.
  • Six large, self-explanatory keys control all functions.
  • Select the model to satisfy your application requirements.
  • Probes are shielded to minimize edge effect.
  • Probes contain an integral thermistor for temperature measurement.
  • Straight and right-angle probes available.
  • Operates on NiCad/Alkaline batteries with built in charger.
  • Operates up to 10 hours on three readily available "C" size alkaline batteries.
  • Rugged weatherproof case and sealed membrane keypad protect internal electronics.
Phasec D60
The Phasec D60 is a lightweight, portable, battery powered eddy current instrument designed to handle the rigors of tube inspection. Dual frequency inspection allows automatic mixing out of unwanted signals (such as tube support plates) at the touch of a button. By recording and playing back signals on the Phasec D-60, inspection setups can be optimized before you start, making sure you always achieve the best possible results.
Phasec 1.1 SD
The PHASEC 1.1 SD delivers a standard of performance and power with reliability and unrivalled ease of use. The PHASEC 1.1 SD has the quality, dependability, and durability that you expect from HOCKING NDT instruments built into them.
Phasec 2200
The New PHASEC 2200 is a small, Simple-to-Use, instrument that offers big Eddy Current performance and user preferred features. The PHASEC 2200 has the quality, dependability, and durability that you expect from HOCKING NDT instruments.

Capabilities Inlcude:

  • Three (3) rotating probe drives are available for the PHASEC2200.   (The Standard Rotating Drive, The NEW MiniDrive, The Incrementing/Indexing Probe Drive)
  • ON-SCREEN CONDUCTIVITY (Digital Conductivity measurements displayed on-screen, in % IACS or Mega-Siemens)
    • Automatic Lift-off configures the instrument phase to optimum angle for detection of surface cracks.
    • Auto-Mix (with manual override) configures the instrument for EASY MIXING.
    • Auto Selected Internal Balance Loads, for use with Absolute type probe.
The QUICKCHECK is a general purpose eddy current flaw detection and metal sorting instrument for both on-site and automated inspection applications. An alphanumeric display allows the user to quickly and easily set the frequency, gain, phase, filters and alarms at the start of a job. The bright LED bargraph ensures accurate, fast, and repeatable signal interpretation. The QUICKCHECK can be combined with simple mechanical fixturing for a low cost inspection system. Operator adjustable alarm settings, multiple instrument syncing capability, and external control of balance, lift-off, and inhibit allow easy QUICKCHECK integration into automated systems.
The MINIPHASEC is a lightweight, compact, phase plane eddy current instrument offering the speed and resolution of a CRT display. The durable design of the MINIPHASEC will give years of dependable performance. The MINIPHASEC offers all the full function phase plane instrument features in a compact design.
II - Hocking Probes
Hocking Probes
Hocking manufacture probes to the highest standard that satisfy demands for eddy current inspection. They can be manufactured to suit specific jobs, such as difficult access, or specific demands for frequency or lift-off performance. Probe types can be loosely grouped into the following types of probe, though different industries may have special probes manufactured
Straight Surface Probes - Shielded

Double shielded probes with a stainless steel shaft and a choice of straight or 90° tip. Metal handle probes have a small handle to allow delicate probe control in areas of restricted access, or for fitting in a probe holder. Acetal (Delrin) handle probes are suitable for general purpose surface inspection work.
Cranked Surface Probes - Shielded

Double shielded probes with a cranked stainless steel shaft and a choice of straight or 90° tip. Metal handle probes have a small handle to allow delicate probe control in areas of restricted access, or for fitting in a probe holder. Acetal (Delrin) handle probes are suitable for general purpose surface inspection work.
Straight Surface  - UnShielded

Unshielded surface probes are lower cost broad field probes which are most effective when used away from edges and sharp changes of geometry. The style shown on this page is used extensively in the Aerospace Industry with Locator, Quickcheck and phase plane instrumentation.
III - Hocking Wheelscan IV
Wheelscan IV -
Automatic Eddy Current Aircraft Wheel Inspection
WheelScan Mk IV is designed to meet the need for fast, automated inspection of aircraft wheels.

Traditionally aircraft wheel inspection has been time-consuming and difficult, with the only opportunity to inspect existing during wheel refurbishment and tyre change. As an inspector you have to be confident that very small flaws will be reliably detected, as failure to do so could be dangerous.

To maintain high safety standards and detect microscopic flaws in a cost-effective manner, inspections have to be automated and take place at speeds the productivity of your wheelshop demands. manual inspection does not offer the combination of speed and accuracy needed, only automatic equipment gives reliable detection at high speed. Hocking eddy current technology enables the detection of cracks on and just below the wheel surface that may be invisible to the naked eye and other non-destructive testing techniques.

Rapid performance and comprehensive coverage WheelScan Mk IV is a high performance fully automated aircraft wheel inspection machine designed to detect cracks and corrosion in wheel half-hubs. It employs eddy current technology through it field-proven WheelScan E instrument and reduces inspection time to approximately two minutes per half-hub, inspecting over 100 half-hubs per day. WheelScan Mk IV can lift wheels weighing up to 200kg (440lb) with diameters up to 830mm (32.6").   WheelScan Mk IV employs a systematic and rapid approach to wheel inspection:

  • Wheel half hub arrives at the machine on the integral conveyor and is raised and rotated on the electrically operated ram. 
  • The operator can set wheel rotation speed and test helix. The probe entry and exit heights are set according to the inspection standard. The RS232 port will allow these settings to be stored and set by a PC. 
  • The probe is automatically calibrated and brought to the half-hub where it tracks the precise profile of the wheel from the programmed start height to the programmed end height. 

The probe sweeps out a helical scan pattern on the wheel surface over the area set by the operator. The test parameters can be varied.  The inspection result is printed out alongside a channel showing the lift-off (paint thickness etc) and calibration records occur before and after the inspection record. 

For a high turnaround, with an extensive reduction in preparation before inspection WheelScan Mk IV measures and records lift-off, which allows the probe to inspect even if it is not in direct contact with the metal. This enables painted wheels to be inspected without stripping.

Details of each inspection are recorded by WheelScan Mk IV's integral two channel chart recorder, providing a hard copy of the results and settings for your service records.

WheelScan Mk IV – the eddy current solution to aircraft wheel inspection.