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CMX Ultrasonic Coating & Wall Thickness Gauge

Made in USA
Dakota CMX Ultrasonic Wall and Coating Thickness Gauge
Click images to enlarge.
The new Dakota CMX v2 measures both coating and wall thickness quickly and accurately—from only one side. In addition, when switched to Pulse-Echo mode, the CMX automatically measures and eliminates the coating from the wall thickness measurement, enabling the user to locate the finest corrosion and pitting—without removing the coating.

Oversized graphic LCD is backlit and features easy to read fonts, graphics and display codes showing all critical settings including Velocity, Operating Mode, Alarms, Scan Mode and more. The backlight can be set to ON (always-on), OFF (always-off) or AUTO (automatically-on when measuring).

Five user-selected operating modes are included:

Coating On: Measures wall thickness using Pulse-Echo. It separately displays wall & coating thickness.

Coating Off: Measures wall thickness using Pulse-Echo. It displays wall thickness only.

Temperature Compensated: Measures wall thickness using Pulse-Echo and automatically adjusts calibration to compensate for changes in material temperature.

Thru-Coat: Measures wall thickness only using Echo-Echo. (coating is NOT included)

Coating Only Mode (CT): (Coating Thickness) Measures from 0.0005 to 0.100 inches (0.013 to 2.540 mm). Range will vary slightly depending on the coating.

New Features in Version 2.0

  • High speed scan 200Hz
  • TDG (Time Dependent Gain)
  • Improved linearity tables (in all measurement modes)
  • 110dB gain range
  • Setups can be backed up or restored using USB connection
  • Screen update rate (25Hz)
  • PRF (pulse repetition frequency 250Hz)
  • Line power available using USB-C to PC or standard power adapter


  • Hardware AGC gain control for multiple echo and thru-paint measurement.
  • Multiple calibration options: One Point, Two Point, or selection from a Material List.
  • 16 factory setups and 48 user-defined setups. User defined setups can be edited for custom applications.
  • CE Certified
  • 2 year limited warranty
  • CMX comes complete with our Windows® PC software for transferring setup / configuration data to and from a PC.
  • Visual and audible alarm with hi and lo limit settings for specific application tolerances.
  • Includes NIST-Traceableb calibration certificate

Measuring Limits

Minimum Radius for Convex Surfaces 0.350" (8.89 mm)
Minimum Radius for Concave Surfaces 3" (76.2 mm)
Minimum Headroom 1" (25.0 mm)
Minimum Sample Diameter 0.150" (3.8 mm)
Minimum Substrate Thickness - F NA
Minimum Substrate Thickness - NFe NA

Complete Kit

The CMX is supplied as a complete kit with the gauge, probe, 4 oz. bottle of coupling fluid, 2 AA batteries, NIST-Traceable Calibration Certificate, operating manual, RS-232 cable and software all in a foam-fitted carrying case.

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Range in Steel:Pulse-Echo Mode: Pit and Flaw detection measures from 0.025 - 9.999inches (0.63 to 254 millimeters)

Echo-Echo Mode: Thru Paint & coatings measures from 0.100 - 4.000 inches (2.54 to 102 mm). Range will vary depending on the thick
Range in Coating Only Mode0.0005" - 0.1000" / Resolution: 0.0001"
(0.013 - 2.540 mm / Resolution: 0.001 mm)
Max Coating0.100" (2.54mm)
Resolution:.001 inches (0.01mm)
Velocity Range:.0492 to .3936 in./ms
1250 to 9999 meters/sec
Units:Inch or mm
Measurement Modes:- Pulse-Echo (corrosion mode)
- Pulse-Echo Coating (Corrosion w/o coating)
- Echo-Echo (thru-paint)
- Temp Comp (auto adjust for material temp)
- Coating Only (Ultrasonic Coating Gauge)
Transducer Types:Dual Element (1 to 10 MHz).
OutputRS-232 for upload/download of setups
Memory capacity:TI-CMX: None
TI-CMXDL: over 200,000 measurements
Power Source:Three 1.5V alkaline or 1.2V NiCad AA cells
Battery Life:Typically operates for 150 hours on alkaline and 100 hours on NiCad
Auto Power off:After 5 minutes of non-use
Display:1/8 in. VGA grayscale display 62 x 45.7mm
Keyboard:Membrane switch with twelve tactile keys
Case:Extruded aluminum body with nickel-plated aluminum end caps (gasket sealed).
Temp. LimitsAmbient: -20 to 120° F (-30 to 50° C)
Material: -0 to 200° F (-20 to 100° C)
Special high temperature model TI-CMX-H is available for 300°F/150°C and optional probes are offered for higher surface temperatures
Weight, net:383 grams
Dimensions:63.5 W x 165 H x 31.5 D mm
Warranty:2 year limited
Certification:CE Approved, Factory calibration traceable to national standards


High Speed Scan Mode & B-Scan Mode

Hi-Speed Scan Mode B-Scan Mode
High Speed Scan Mode B-Scan Mode
Scan Mode measures 64 times per second, displaying the max and min reading measured during the scan interval. Sample rate is 200/sec when coating measurement is off. The B-Scan displays a time based cross section view of test material of the contour of the blind, or underside of a pipe or tank application. the B-Scan view draws at a rate of seven seconds per screen from right to left.

Buy Now

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1/2" diameter, 5.0 MHz dual element transducer, coating thickness capabable, Side in, Potted
1/2" diameter, 3.5 MHz Coating Transducer
1/4" 5Mhz Coating Transducer for Material Temp up to 300 °F (150 °C)
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1/2" 5 Mhz Hi Damp Coating Probe with 50 ft. underwater cable
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SoundSafe Coupling Fluid - 12 oz / 354 ml - NSN: 6635-01-553-0559
High Temp Coupling Fluid 4oz (600 - 780 F / 316 - 404 C)
V-Block Transducer Holder (For 3/16" & 1/4" Transducers only), F-000-7001
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