Advanced Handheld Eddy Current Testing

Introducing MIZ®-21C, the most advanced handheld instrument with surface array capabilities. The truly affordable MIZ-21C is ideal for aerospace applications. Its ergonomic design, long battery life and intuitive touchscreen enable the user to inspect more areas faster than ever without fatigue. With features that include depth sizing, fully sealed unit, excellent operating temperature range, up to 10 hours of battery life, large internal storage capacity and more, MIZ-21C maximizes inspection efficiency and value.

Please note that the MIZ-21C is manufactured by Zetec Inc. Although affiliated to Eddyfi Technologies, Zetec Inc. is an independently managed company because of contractual obligations with the US government as a key supplier for classified business. Zetec products are sold by Eddyfi Technologies on behalf of Zetec Inc.


  • Surface Array In A Handheld Instrument

  • Increase Uptime, Wherever You Go

  • Ergonomic Design

  • Intuitive Touchscreen

  • Field Ready

  • Highly Versatile

  • Flexible Connectivity

  • Universal Symbol Buttons & Multi-Language Software


Save time and money

MIZ-21C is a fast, highly portable and cost-effective replacement for Liquid Penetrant Testing (PT) and Magnetic Particle Testing (MT) inspections. The surface array option can reduce inspection time by up to 95% versus pencil probes.

MIZ-21C’s intuitive touchscreen and simple, yet powerful embedded software gets users inspecting in no time, offering quick set-up and hassle-free operation.

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Inspect more areas

The MIZ-21C is designed for user comfort. Its low weight of 1.2 kg (2.6 lbs) makes it ideal for one hand operation. The small form factor enables users to carry the MIZ-21C in any inspection environment, enabling the portability of surface eddy currents to a level never reached before.

Improve flaw detection

MIZ-21C features an industry-leading signal quality for an improved flaw detection capability. When coupled with surface array, users can be confident that MIZ-21C will deliver the most thorough inspection in its class.

Designed for a wide range of applications

MIZ-21C delivers an inspection advantage across numerous inspection applications including:

Depth Sizing for Cracks or Corrosion.

Depth sizing is a critical need in many inspection industries to determine crack depth, the extent of corrosion penetration, or other types of flaw sizing. The MIZ-21C uses depth curves that are established through a calibration process from a standard with known indications. These indications are representative of the flaws that are to be detected. Depth sizing can be done with conventional probes or Surf-X Array probes. Near Surface or Far Surface (ID vs OD) must be defined due to different response. When creating the depth curves, they can be defined by amplitude volts or phase angle and many types of best fit curves are available to select from to give the best results.

Multi-Layer Corrosion Inspection.

Identifying corrosion is one of the most critical and complex aspects of airframe inspections. Changes in skin thickness as well as varying multi-layer structures usually make it difficult to recognize signals. The MIZ-21C has the power to penetrate thick sections. Exceptional signal-to-noise ratio helps inspectors distinguish even a small loss of material. Dual-frequency with mixing nearly eliminates the unwanted signals caused by varying air gaps between layers that can “mask” the signal of interest.

Detecting Cracks Near Fastener Holes.

Pencil probes are an option for detecting small cracks in close proximity to fastener holes. The inspector uses a known crack or notch standard to set up the MIZ-21C signal display. Then, while scanning the test piece, the inspector can estimate the depth and length of surface cracks by comparing the phase and amplitude of the generated eddy current signal to the standard’s signal. A fast, simple option is to use the available surface array capabilities of the MIZ-21C instrument and Surf-X Array probe. This approach can simplify the inspection and complete it in a fraction of the time compared to more traditional methods.

Conductivity and Coating Thickness Measurement.

Use digital conductivity measurements (resistivity) to characterize/sort materials. Directly measure the conductivity of metals and alloys, such as aluminum structures, using dedicated conductivity probes that have a broad operating frequency range. Or measure a nonconductive coating such as paint. The MIZ-21C offers a wide measurement range for both conductivity and thickness.

Available in Three Models

Single Frequency
Dual Frequency
Rotating Scanner
Eddy Current Array
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Zetec MIZ-21C


Dimensions (H × W × D)

267 × 122 × 38 mm (10.5 × 4.8 × 1.5 in)

Weight (including batteries and cover)

1.2 kg (2.6 lb)

Multi-Touch Display

5.7 in (480 x 640 pixels)

Battery Life

Up to 10 hours

Eddy Current Connector

18-Pin Lemo

Eddy Current Array Connector

26-Pin Lemo


USB 2.0, Wi-Fi, Bluetooth


2 axes, Quadrature, Only 1 axis is currently available for surface array applications

Probe Recognition and Setup

Automatic with Zetec ID Chip

Coil Inputs

MIZ-21C-SF: 1, MIZ-21C: 1, MIZ-21C-ARRAY: 3

Frequencies Per Timeslot

MIZ-21C-SF: 1, MIZ-21C: 2, MIZ-21C-ARRAY: 2

Data Channels

MIZ-21C-SF: 32, MIZ-21C: 64, MIZ-21C-ARRAY: 192

Maximum Probe Coils

MIZ-21C-SF: 2, MIZ-21C: 2, MIZ-21C-ARRAY: 32

Frequency Range

5 Hz to 10 MHz

Generator Output

Up to 12 Vpp (19 Vpp for ECA) in 0.1 Volt increments

Injection Modes

Continuous and Super-Multiplex

Receiver Gain

10 to 173 dB

Data Resolution

16 bits

Probe Drive

50 Ohm


Median, High Pass, Low Pass, High Pass 2 (Adjustable CC), Bandpass, Spike, SNR


Adjustable Box, Sector, and Polar, Audio adjustable volume, Headphone support

Conductivity Frequency

60, 120, 240 and 480 kHz

Conductivity Specification

Digital readout in 0.9 to 110 %IACS (0.5 to 70 MS/m), Accuracy within ±0.5% IACS from 0.9% to 65% IACS and within ±1.0% of values over 65%

Non-Conductive Coating Thickness

Can measure non-conductive coating thickness from 0 mm (0 mil) to 2.032 mm (80 mil). Accuracy of 0.025 mm (±0.001 in.) over a 0 mm to 0.64 mm range

Rotating Scanner

MIZ-21C-SF: No, MIZ-21C: Yes, MIZ-21C-ARRAY: Yes Zetec Rotating Scanner, Others

Maximum Data File Size

60 s or 10 meters


English, Spanish, French, German, Chinese, Japanese, Portuguese, Russian


128 GB

Instrument Calibration

Compliant with ISO/IEC 17025:2005, Meets or exceeds manufacturer's requirements


100 to 240 VAC, Auto-Switching


50 to 60 Hz

Output Voltage

15 VDC

Maximum Power

40 W

Operating Temperature

-10°C to 50°C (14°F to 122°F)

Storage Temperature

-20°C to 70°C (-4°F to 158°F) (w/out batteries)

Relative Humidity

95% non-condensing