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ZX3 Ultrasonic Thickness Gauge

Ultrasonic Material Thickness Gauge

The ZX3 is a professional ultrasonic material thickness gauge providing extreme flexibility & accuracy to field calibrate to a variety of materials & corrosion of all metals, ceramics, glass and most rigid plastics. The ZX3 is ideal for manufacturing or R & D departments that test or measure thickness of various material types, without having to revalidate material velocity for calibration allowing fast work.

ZX3 wall thickness gauge measure thickness up to 36 inches (915 mm), depending upon the material and transducer.

The ZX3 thickness gauge is a sturdy & highly accurate general thickness gauge for professional users requiring high accuracy & demanding years of error free performance while requiring only basic thickness measurement of various materials.

Adjustable GAIN in 5 steps to fine tune the gauge for use on challenging materials or applications
> 120 MHz FGPA timing
> 150 volts square wave pulsar

The Dakota ZX3 multi frequency velocity thickness gauge is ideal for measuring thickness or detection of corrosion & pitting in tubes & pipes, tanks, steel plates, boilers, glass & a variety of other manufacturing or maintenance application.

Product Specification

Total Measuring Range

0.025 - 36.000 inches
0.63 - 914.4 mm
(depends on material and transducer/probe type)

Measuring Range

0.040-8.000 inches
1.00-199.9 mm
(with standard transducer T-102-2000)


0.001 inch (0.01 mm)

Measuring Mode

Pulse-Echo (P-E)

Velocity Range

0.0120 to .7300 in/μs. 305 to 18,542 meters/sec


200 Hz

GAIN Adjustment

Adjustable GAIN 5-position (VLOW, LOW, MED, HIGH, VHI), in 3dB steps, 40-52dB

Probe (Standard)

1/4", 5 MHz Dual Element Transducer, actual wearface is 5/8" (17mm), p/n T-102-3300

Probes (optional)

1 to 10 MHz, 3/16" up to 1 inch (custom probes available)

Probe Wearface

PEEK (Polyethylethylkytone)


1.2m (4ft.) waterproof cable with non-polarized, quick-disconnect connectors

LCD Display

Multi-function 7 segment 4.5digit liquid crystal display with 0.500”-digit height. Two 0.125 in14 segment fields for labels and values, and one 7 segment field for labels and values. Additional icons to indicate features and modes

Display Backlight

Backlight is selectable on/off/auto, and selectable brightness (Lo, Med, Hi) options

Display Update Rate

10 Hz (10 updates/sec)

Temp. Limits

-3- to + 75 OC (High temp. proteas available)

Battery Type

2x AA batteries (rechargeable batteries can be used)

Battery Life

45 hours continuous use


308 grams


63.5 x 131.3 x 31.5 mm (2.5" x 5.17" x 1.25")


Probe/cable assembly, 4 oz. bottle of coupling fluid, NIST Calibration Certificate, 2 AA batteries, operating instructions, hard-plastic carrying case.


Extruded aluminum body with nickel-plated aluminum end caps (gasket sealed)

Housing Rating



NIST Traceable and MIL-STD-45662A


Sealed membrane that is resistant to both water and petroleum products
Seven or eight tactile-feedback keys

To Lock Settings

With gauge powered off, press and hold the "+" key while powering on the gauge
The LOCK icon will be illuminated on the Display

To unlock Settings

With gauge powered off, press and hold the "-" key while powering on the gauge
The LOCK icon will turn off


  • Resolution of 0.001 inch (0.01 mm)
  • Switch-selected units for inches or mm
  • User-selected Manual or Auto Zero of Transducer
  • User can select from 8 preset materials as well as program 2 custom material velocities
  • Calibrate to a sample of known thickness which automatically calculates the optimal acoustic velocity
  • 2-Point Calibration to optimize linearity over a wide measurement range, automatically calculates the optimal acoustic velocity
  • Scan mode, 100 readings/sec. Probe is slid over a large measuring area, the minimum thickness during the "scan" will be displayed
  • Special-purpose probes are offered for a variety of applications (1 to 10 MHz)
  • The extruded aluminum housing is impact-resistant and environmentally sealed (IP 65), water & dust proof.
    to provide trouble-free operation under the toughest field conditions
  • For underwater surveying, an optional 50 ft (15 meter) underwater probe/cable is available
  • High visibility LCD Display is readable in all lighting conditions and temps as low as 22 °F (-30 °C)
  • LCD shows Thickness Value, Velocity Setting, Gain Setting, Stability & Battery Indicators, Scan Mode, Zero and units
  • Operates on two (2) AA Batteries - 45 hours continuous operation
  • Selectable Backlight ON/OFF/AUTO
Frequently Asked Questions (3 answered questions)
Ultrasonic thickness measurements depend on measuring the length of time it takes for sound to travel through the material being tested.

Person name: Asian

from 0.63 to 914.4 mm. However, the actual measuring range is dependant on the trasnducer used.

Person name: Asian

Calibration is easily done with the probe zero method in Pulse-echo mode

Person name: Asian

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