Dakota NDT CMX Advanced Thickness Gauges

High Performance Multi-Mode Material & Coating Thickness Measurements

How Pulse Echo Mode Works

1. Couplant 3. Testing Material

How Echo-Echo Mode Works

1. Couplant 2. Coating 3. Test Material

How Pulse Echo + Coating Mode Works

1. Couplant 2. Coating 3. Testing Material

All 3 measuring modes featured in all CMX instruments

CMX High Performance Material & Coating Thickness Gauges with advanced Thru-Coating Capability

Dakota CMX instruments have both basic modes - Pulse-Echo (P-E, 0-1st echo) and Echo-Echo (E-E, Thru-Coating), as well as PECT mode and other additional modes depending on the specific gauge. Includes 2 Year Limited Warranty.

Features:

CMX1 / CMX1-DL: Digital and B-Scan Display
CMX2-DL: Digital and B-Scan Display, PLUS A-Scan
CMX3-DL: Digital and B-Scan Display, A-Scan, PLUS high speed color display

CMX1 / CMX1-DL (Formerly CMX/CMX-DL)

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Displays:
B-Scan
Large Digits

Measuring Modes:
Pulse-Echo (P-E) mode
Echo-Echo (E-E) mode
Echo-Echo-Verify (E-EV) mode
Pulse-Echo-Coating (PECT) mode
Pulse-Echo Temperature Compensated (PETP) Mode
Coating Only (CT) mode

Options:
Data Logger (DL)

CMX2-DL / CMX3-DL (Formerly CMX DL+/CMX DL+C)

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Displays:
A-Scan or High Speed Color A-Scan
B-Scan
Large Digits

Measuring Modes:
Pulse-Echo (P-E) mode
Echo-Echo (E-E) mode
Echo-Echo-Verify (E-EV) mode
Pulse-Echo-Coating (PECT) mode
Pulse-Echo Temperature Compensated (PETP) Mode
Coating Only (CT) mode

Features:
Data Logger (DL)

CMX Series Measurement Modes

Pulse-Echo-Coating (PECT) Mode - Coating On

Measures Thru-Coating, detects pitting and measures when Echo-Echo (E-E) mode fails. PECT is a unique method that provides the benefits of Pulse-Echo (P-E) and Echo-Echo (E-). Measure coated material without errors caused by the coating while being able to measure on materials with corroded and pitted back-walls.

CMX2-DL PECT Mode CMX2-DL A-Scan PECT CMX Digital Display

Echo-Echo-Verify (E-EV) Mode

The Echo-Echo-Verify (E-EV) mode measures between 3 reflections. Similar to Echo-Echo (E-E) mode, this technique is commonly used to eliminate errors from surfaces with multiple-layers of coatings. The primary benefit of this mode is that it compares the 2nd and 3rd echoes to verify that a peak jump has not occurred in order to provide an additional level of confidence in the measurement.

CMX2-DL E-EV Mode A-Scan CMX E-EV Digital Display CMX2-DL E-EV A-Scan

Pulse-Echo Temperature Compensated (PETP) Mode - Temp Comp

The Velocity of the probes delay-lines changes as they heat up and cool down, creating a Zero Point error. PETP mode automatically corrects this problem creating a constant zero that eliminates the need for frequent Probe Zeroing.

CMX2-DL PETP A-Scan CMX2-DL PETP Digital Display CMX2-DL PETP Mode

Coating-Only (CT) Mode

Coating-Only (CT) Mode is a custom hybrid combination mode using special techniques to effectively measure the thickness of coatings.

CMX CT Mode

Display Modes

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A-Scan Display

A-Scan shows the signal that is being measured.

Strong Back Wall Echo and Multiple Echo

B-Scan Display

B-Scan graphs a series of measurements. This results in a profile view that is helpful to understand if the material has a single or series of pits, general corrosion, inclusion or lamination.

Consistent Back Wall Echo

Digital Display

The CMX Series' digital display is simple, direct reading, and can add min/max.

Digital Display with Min & Max

A-Scan vs. B-Scan Measurements

A-Scan		B-Scan
Pitted material will show a signal coming before the Back-Wall Echo and a diminished or non-existent the Back Wall Echo, depth measurement will be inconsistent and vary point to point		B-Scan showing various irregular thicknesses
An inclusion will show a signal coming before the Back Wall Echo but the Back Wall Echo is unaffected.		B-Scan shows inclusions at consistent depth (plateau)
A lamination usually at mid-wall and of consistent depth		B-Scan showing a plateau of considerable length