SigmaCheck2 Eddy Current (ECT) Conductivity Meter

The SigmaCheck2 Eddy Current (ECT) Conductivity Meter is designed to provide the user with fast and accurate conductivity measurements at a reasonable price.

The SigmaCheck2 EC Conductivity Meter is extremely easy to use making it suitable for use by shop inspectors or engineers.

The SigmaCheck2 ET Conductivity meets the requirements for conductivity measurements in the Aircraft manufacture and maintenance fields where conductivity measurements are used to verify proper alloy/temper or detect heat damaged components. The SigmaCheck2 Eddy Current Conductivity Meter is also useful to determine the purity of precious metals (counterfeit detection) such as gold bullion and coins.

  • Material verification/sorting
  • Heat treatment verification
  • Heat or fire damage investigation
  • Lightning damage investigation
  • Determining material purity/composition
  • Material ageing assessment
  • Measuring phosphor content of Cu Alloys
  • Monitoring of deposition process for non ferrous material on a non-ferrous substrate
  • Monitoring the condition of highly stressed parts
  • Forged/plated material detection

The SigmaCheck2 EC Conductivity Meter has a large, color, LCD display that is easily seen in all lighting conditions.

The SigmaCheck2 is easy to hand-hold due a sculpted housing designed to fit in your hand and a convenient size and weight; only ¾ of a pound (350g) and measuring less than 6 ½” tall x 3 ¼” wide x 1” thick (163 x 80 x 25mm). A removable, silicon rubber boot is included to protect the instrument in rough environments. The standard Probe has been designed to comfortably fit the hand of the user.

The SigmaCheck2 ET Conductivity Meter has a standard operating frequency of 60 kHz and auxiliary frequencies of: 120, 240, 480 and optional 960kHz can be selected when necessary for testing thin materials with the standard probe.

  • Field Exchangeable Probes via SD Card
  • True USB PC Connectivity for remote control and data logging.
  • The USB Connection allows easy charging of the Instrument without having to swap the batteries.

Inspection Technology 

Eddy Current. 

Operating Frequencies 

60 kHz, 120 kHz, 240 kHz, 480 kHz. Option of 960 kHz. 

Conductivity Range 

0.5 % IACS to 110 % IACS, 0.28-64 MS/m 


Probe must be in thermal equilibrium with test material, and instrument and probe stabilized prior to testing Minimum 15-minute warm up time for stabilisation. At 20°C: 0-20% IACS: ± 0.05 IACS At 20°C: >20% IACS ± 0.25% of readout

Display Resolution 

Up to 3 decimal places 

Lift Off 

13 mm probe compensated to 0.020” (0.5mm) 7 mm probe compensated to 0.010” (0.25 mm) 

Temperature Measurement 

In-probe sensor (accurate to 0.5 °C). Range 0 °C to + 50 °C 

Automatic Temperature Compensation 

Conductivity measurements are corrected to the 20°C value. 

Environmental Range 

0 to 95% relative humidity, 0°C to + 50°C for reliable operation 


2.8” (70mm) 320 x 240 pixels colour display. LCD with selectable backlight. 

Construction & Storage 

High impact, splash-proof, moulded UL94-5VA flame-retardant ABS case. Protective rubber boot to protect the unit, probes, probe cable, operator manual on USB, and removable stand. 

Conductivity Standards 

On top of unit. Removable for value verification, and when attached ensures thermal equilibrium. 


2 x 1.5 V AA NiMH Batteries, Approx up to 9 hrs life. Recommended rechargeable batteries: Panasonic Eneloop Pro, 1.2 V min.2500 mAh or equivalent) Can also use non-rechargeable AA cells


163mm (6,4”) x 80mm (3.1”) x 25mm (1.0”)


350g (0.77 pounds) including batteries 

Data Logger Memory 

Removable 2GB micro SD Card allowing over 1 million readings to be stored. 

PC Connectivity 

USB port for charger and PC communications 


13mm diameter for 60 kHz to 480 kHz 8mm probe operates at 60 kHz to 480 kHz Probes are interchangeable with simple operator resetting procedure. Probes are field exchangeable and do not require return to manufacturer for calibration.


A range of conductivity reference standards traceable to US and European standards are available for in field use. Up to five can be mounted on an aluminium anodised Setting Reference Blocks Holder (Part number: ASIG003)

Standard SigmaCheck Kit:



Kit, SigmaCheck2, Conductivity Meter Including:


Accessory, Dual Conductivity Reference Standrds, Nominal Values 8.5% and 101% IACS


Accessory, Instrument Stand


Accessory, Hard Peli 1400 Case with custom shaped foam inserts


Probe, Conductivity, Dia 13.00mm, Straight, Lemo 5-Way


Accessory, Lead, 5-Way Lemo to 5-Way, Lemo, 1.5m


Probe, Conductivity, Dia 8.00mm, Straight, Lemo 5-Way


ATBC Conductivity Test Block

We offer the following reference blocks;

    • ETher Product Number


      Value Range %IACS

      Value Range MSm



      (99.9 - 102.5)

      (57.9 - 59.5)


      Aluminium Alloy, 1200-H4

      (57.2 - 60.5)

      (33.2 - 35.1)


      Aluminium Alloy, 6082-T6

      (43.8 - 49.0)

      (25.4 -28.4)


      Aluminium Alloy, 6061-T4

      (40.3 - 43.8)

      (23.4 -25.4)


      Aluminium Alloy, 2014A-T6

      (37.4 - 40.3)

      (21.7 - 23.4)


      Aluminium Alloy, 2014A-T4

      (34.7 - 37.4)

      (20.1 -23.4)


      Aluminium Alloy, 7075-T6

      (30.0 - 34.1)

      (17.4 -19.8)


      Aluminium Alloy, 5083

      (26.6 - 30.0)

      (15.4 - 17.4)


      Brass, CZ 121

      (23.3 - 26.6)

      (13.5 - 15.4)


      Phosphor Bronze


      (7.5 - 10.4)


      Nickel Silver, LC1291

      (9.0 - 9.9)

      (5.2 - 5.7)


      Stainless Steel, 303 S

      (2.1 - 2.5)

      (1.2 - 1.4)


      Titanium, 6AL-4V

      (1.0 - 1.1)

      (0.6 -0.7)

    and a convenient holder (ASIG003) which will hold five blocks as well as providing a location to secure a SigmaCheck Top Block.

  • ASIG003- Test block holder

  • If you have any questions regarding the SigmaCheck2 Conductivity Meter, please feel free to contact a member of the team at