SigmaCheck 2 Eddy Current Conductivity Meter

The Ether NDE SigmaCheck 2 Eddy Current Conductivity Meter is designed to give accurate conductivity measurements while offering the user the very best in reliability, usability, technology and cost-effectiveness. The SigmaCheck 2 is extremely user friendly and can just as easily be operated by a semi-skilled Operator as by Experts.

The SigmaCheck 2 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. It is also useful to determine the purity of precious metals or whether they are counterfeit. It is equally at home in the Aerospace, Metals Processing, Casting, Maintenance and Quality Assurance industries as well as appealing to Heat Treatment Specialists.

Product Update – The SigmaCheck2 (KISIG001A) has been upgraded to the SigmaCheck2 (KISIG001B). The new SigmaCheck2 has an updated probe map design, upgraded PCB Board, increased battery life with NEW built-in lithium ion battery, and an improved setup calibration block design. (12/2023)

We pride ourselves in providing fast deliveries. However inventory changes rapidly and on occasion some items may not be in stock. If you require an expedited shipment, please contact us via e-mail or call our office to confirm availability of an item. *Nominal lead times vary by product.

Product Information

The SigmaCheck 2 complies with the requirements of the following inspection procedures:

  • Boeing BAC5651
  • Airbus AITM 6-6004
  • ASTM E1004
  • AMS2658
  • BS EN 2004
  • MIL-STD-1537
  • Bell Helicopter BPS 4453

Key Features

  • Built-in Lithium Ion Battery
  • User programmable display
  • 2GB of data storage. Able to store over one million data points
  • Uploaded data can be viewed using MS Excel
  • Intelligent charger via Micro USB Port
  • Multiple languages available – English, French, German, Spanish.
  • Excellent resistance to “edge effect”
  • Rapid Display of Conductivity Results
  • Battery life up to 12 hrs.
  • Firmware can be upgraded in field
  • Different probes may be configured by loading the appropriate probe map from SD Card
  • Real-time clock for time and date so that readings can be “time stamped”
  • Real-time PC control via USB or optional RS232 link


  • Material verification / sorting
  • Heat treatment verification
  • Heat or fire damage investigation
  • Lightning damage investigation
  • Material aging 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 verification
  • Non-conductive coating thickness measurement
  • Determining the purity / composition of materials i.e. gold bullion and coins
  • Aircraft structures e.g. Paint thickness measurement
  • Assessment of aging of alloys


ETher NDE SigmaCheck2 Specifications
Conductivity Range 0.5% IACS to 110% IACS, 0.28 – 64 MS/m
Operating Frequencies 60kHz, 120kHz, 240kHz, 480kHz. Option of 960kHz
Accuracy Probe must be in thermal equilibrium with test material and instrument and probe stabilized prior to testing.
Minimum 15-minute warm up time for stabilization
At 68°F / 20°C: 0 – 20% IACS: ± 0.05 IACS
At 68°F / 20°C: >20% IACS ± 0.25% of readout
Display Resolution Up to 3 decimal places
Lift Off 13mm probe compensated to 0.020″ (0.5mm); 8mm probe compensated to 0.010″ (0.25mm)
Temperature Measurement In-probe sensor (accurate to 32.9°F / 0.5°C)
Range 32°F – 122°F / 0°C – 50°C
Automatic Temperature Compensation Conductivity measurements are corrected to the 68°F / 20°C value
Environmental Range 0 to 95% relative humidity, 32°F – 122°F / 0° – 50°C for reliable operation
Display 2.8″ (70mm), 320 x 240 pixels color display. LCD with selectable backlight
Construction & Storage High impact, splash-proof, molded 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.
Power 1 internal rechargeable battery, 3.635 V, Lithium Ion, 3.5Ah.
Over 12 hours battery life at 60kHz, 50% screen brightness.
Size (L x W x H) 6.4″ x 3.1″ x 1.0″ / 163 x 80 x 25 mm
Weight 0.79 lbs. / 358g. including batteries and dual reference block
Data Logger Removable 32GB micro SD Card allowing over 2 million readings to be stored
PC Connectivity Micro USB port for charger and PC communications
Languages Multiple languages available e.g. English, German, French & Spanish