Brand: Dakota NDT

Dakota CMX2-DL Corrosion Thickness Gauge

Name: Dakota CMX2-DL Corrosion Thickness Gauge – Datasheet & Quote
Brand: Dakota NDT

Description

Overview

The Dakota CMX2-DL (Part Number: Z-172-0005) is an ultrasonic thickness gauge that combines the ruggedness of the CMX series with A-Scan waveform display. Seven Star LLC supplies it to engineers and inspectors who need more than a numerical reading. The real-time A-Scan lets operators verify the pulse-echo signals visually, confirming that readings come from the actual back wall rather than internal inclusions or pitted surfaces.

Housed in a precision-machined, gasket-sealed aluminum enclosure, the Dakota CMX2-DL is built for the harshest industrial environments. The “DL” designation indicates a sophisticated internal data logger that enables the storage of large-scale inspection data. The Dakota CMX2-DL is uniquely capable of measuring material thickness through thick industrial coatings without the need for grinding or surface preparation, making it the most efficient solution for asset integrity management in the oil, gas, and maritime sectors.

Measurement Principle

The gauge uses dual-element ultrasonic transducers and calculates material thickness at a selectable display resolution of 0.01 mm or 0.001 mm. In Pulse-Echo (P-E) mode it measures the total time of flight of the ultrasonic pulse. On coated surfaces it switches to Echo-Echo (E-E) mode, using the time between two successive back-wall echoes to exclude the coating from the measurement.

Its main technical advantage is the A-Scan, a graphical view of the ultrasonic wave’s time and amplitude. From the waveform an inspector can identify signal attenuation, judge the couplant bond and distinguish real corrosion from material laminations, which gives high confidence in the recorded thickness data.

Engineering Design and Construction

The CMX2-DL (Z-172-0005) is built for long-term field reliability. Its extruded aluminium body absorbs significant impact and shields the internal electronics from electromagnetic interference (EMI). It has a 1/8 VGA grayscale display of 240 x 160 pixels with a 2.4 x 1.8 in (62 x 45.7 mm) viewable area and EL backlighting selectable between on, off and automatic, together with adjustable gain and range settings, so the operator can tune the A-Scan view for clear signals regardless of material or lighting.

Heavy-duty Lemo 00 connectors keep the signal clean between the gauge and the transducer. The device runs on three AA cells, giving approximately 35 hours of continuous grayscale field use on alkaline or NI-MH batteries, with USB-C line power available when connected to a PC or mains outlet. The sealed membrane keypad is designed for high-repetition use and keeps out dust, water and industrial oils, and the published operating range is -10°C to 60°C (14 to 140°F).

Measurement Modes of the Dakota CMX2-DL

Six distinct measurement modes give the Dakota CMX2-DL the flexibility to handle painted, bare, and hot surfaces without changing instruments. Coating Off mode runs conventional Pulse-Echo (P-E) for pit and flaw detection from 0.63 mm to 30.48 m. Coating On mode (PECT) reports the material and the coating simultaneously, resolving coating layers from 0.01 to 2.54 mm. Pulse-Echo Temperature Compensation (PETP) applies automatic correction for the velocity shift that occurs when steel is measured above ambient temperature, which is the practical difference between a usable and a misleading reading on live process lines.

For painted assets, Thru-Paint Echo-Echo (E-E) measures 2.54 to 152.4 mm of substrate while ignoring the coating entirely, and Thru-Paint Verify (E-EV) cross-checks that result against a second echo pair before it is logged. Coating Only mode (CT) reports film thickness alone from 0.0127 to 2.54 mm. All six run on a 100 MHz DSP platform using FPGA technology with dual square-wave pulsers, dual receivers, adjustable damping from 50 to 1500 ohms, and linear time-dependent gain with adjustable slope, so the Dakota CMX2-DL can be tuned to attenuative or coarse-grained materials rather than simply rejecting them.

Key Features of Dakota CMX2-DL

Real-Time A-Scan Visualization: The Dakota CMX2-DL offers rectified and RF waveform views for signal verification.
Echo-Echo Thru-Paint Technology: Measure the true remaining metal thickness through coatings without grinding, with Echo-Echo covering 2.54 to 152.4 mm of material and Pulse-Echo Coating mode reporting coating thickness from 0.01 to 2.54 mm on the Dakota CMX2-DL.
Comprehensive Data Logging: The Dakota CMX2-DL provides 4 GB of internal memory with grid (alpha-numeric) and sequential auto-identifier log formats, plus bitmap screen capture, for full audit traceability.
Automatic Gain Control (AGC): The Dakota CMX2-DL automatically optimizes the signal strength for different material types.
Rugged Aluminum Enclosure: Extruded aluminium body with gasket-sealed, nickel-plated aluminium end caps, built for offshore and heavy industrial use.
Multi-Probe Compatibility: The Dakota CMX2-DL is compatible with a wide array of single and dual-element transducers from 1 to 20 MHz in contact, matching-layer, delay-line, and pencil configurations.

Industrial Applications

The Dakota CMX2-DL (Z-172-0005) is the primary choice for critical B2B inspection tasks, including:

Offshore Platform Inspection: Monitoring structural members and risers through heavy marine coatings.
Refinery Pressure Vessels: Accurate wall loss assessment in high-temperature process equipment using the Dakota CMX2-DL.
Subsea Pipeline Integrity: Detecting internal pitting and erosion in oil and gas transport infrastructure.
Aerospace Material Testing: Verifying the thickness of high-value alloy components with A-Scan verification.
Chemical Storage Tanks: Rapidly mapping the corrosion profile of painted tank floors and walls.

Across the Sultanate of Oman and the wider GCC, the Dakota CMX2-DL is deployed on exactly the assets where corrosion under insulation and coating build-up defeat simpler gauges: crude and gas gathering lines in the interior fields, storage tank shells and floors at Sohar and Duqm, seawater intake and brine headers on RO desalination trains, and jetty and loading-arm structures exposed to Gulf humidity and salt aerosol. Its Temperature Compensation mode is particularly relevant to plants that cannot take a line out of service for inspection, while B-Scan time-based cross-section view at 10 to 200 readings per second allows an inspector to profile a run of pipe rather than collect isolated spot readings. As the officially authorized partner for Dakota NDT, Seven Star LLC distributes, calibrates, and supports the CMX2-DL throughout Oman and the GCC, including the Sohar and Salalah economic zones.

Technical Specifications

Variable	Specification
Manufacturer	Dakota NDT
Model	Dakota CMX2-DL
Part Number	Z-172-0005
A-Scan Display	Rectified and RF Waveform Modes
Measurement Modes	Pulse-Echo (P-E) & Echo-Echo (E-E)
Thru-Paint Range	2.54 to 152.4 mm (0.100 to 6.0 in), Echo-Echo mode
Standard Range	0.63 mm to 30.48 m (0.025 to 100 ft), Pulse-Echo mode
Resolution	±0.01 mm (0.001 in) or ±0.001 mm (0.0001 in), selectable
Calibration	Single and two-point calibration for material and coating; factory calibration traceable to NIST & MIL-STD-45662A
Velocity Range	309.88 to 18,542 m/s (0.0122 to 0.7300 in/µs)
Gain Control	110 dB range, manual or automatic gain control (AGC)
Memory Capacity	4 GB internal memory
Display Update Rate	25 Hz grayscale screen refresh; 250 Hz pulse repetition frequency
Transducer Connection	Dual Lemo 00 Connectors
Case Material	Extruded Aluminum (Gasket Sealed)
Keypad	Membrane switch pad with twelve tactile-feedback keys
Battery Life	Approx. 35 hours grayscale (alkaline / NI-MH); 10 hours (NiCad)
Weight	383 g (13.5 oz) with batteries
Dimensions	63.5 × 165 × 31.5 mm (2.5 × 6.5 × 1.24 in)
Operating Temperature	-10°C to 60°C (14 to 140°F)
Warranty	2-year limited manufacturer warranty
Processing Platform	100 MHz DSP with FPGA technology, dual channels
Pulser / Receiver	Dual square wave pulsers; dual receivers, adjustable damping 50–1500 ohms
Timing	Precision TCXO with single-shot 100 MHz 8-bit low-power digitizer
Display	1/8 VGA grayscale, 240 × 160 px, 62 × 45.7 mm viewable, EL backlit
B-Scan	Time-based cross-section view, 10 to 200 readings per second
Transducer Types	Single / dual element, 1 to 20 MHz; contact, matching layer, delay line, pencil
Data Output	USB-C 1.1 direct PC connectivity with Windows interface software
Log Formats	Grid (alpha-numeric) or sequential (auto identifier); TIF screen capture
Power	Three AA cells (alkaline, NiCad, or NI-MH) or USB-C line power

Request a Quote for Dakota CMX2-DL Corrosion Thickness Gauge

Seven Star LLC is your official authorized partner for the Dakota CMX2-DL Corrosion Thickness Gauge. We provide comprehensive technical training, calibration support, and rapid RFQ processing for the Z-172-0005. Contact our engineering sales team today for a formal quotation or to request the complete Dakota CMX2-DL technical datasheet.

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About brand

Ultrasonic thickness gauging is the core of Dakota NDT, the Scotts Valley, USA maker that many inspectors still know as Dakota Ultrasonics. Its instruments measure remaining wall on corroded pipe and vessels, check precision parts, find flaws in welds and monitor bolt elongation. Seven Star LLC is the Dakota NDT agency for Oman and the GCC. We list Dakota corrosion and precision thickness gauges, flaw detectors, transducers, delay line tips and calibration blocks, and supply them with the manufacturer's documentation.

Dakota NDT product families

Corrosion thickness gauges form the largest group: the CMX10-DL with full waveform capture, the CMX, CX and ZX series and the MX2-DL. For thin or tight-tolerance material Dakota builds the precision line, made up of the PZX1-DL, the PCX8-DL and the PMX series. The RX8-DL sonic tester, the PMX4-DL and the R9 sit in the specialty group. Flaw detection is handled by the handheld FX71-DL and the bench-top FX81-DL, and bolt tension by the BT1-DL, the BT2-DL and the MultiMax remote monitoring system. Dual element transducers pair with corrosion gauges, single element and delay line probes with precision gauges. DakMaster and DakView software take care of data transfer and reporting.

Where Dakota ultrasonic thickness gauges are used

Typical jobs are wall-loss surveys on pipelines, tanks, boiler tubes and pressure vessels in oil and gas plants and power stations, thickness checks on machined, drawn or molded parts, weld inspection in fabrication shops, and bolted joints on flanges and turbines where clamp load matters more than torque.

Ordering Dakota gauges and probes: what we need

A useful inquiry names the gauge model, the material, its expected thickness span, the surface temperature and whether the surface is coated. For transducers send the frequency, element diameter, connector type and the gauge the probe will be used with. For calibration blocks give the material and the step sizes you need. If you already own a Dakota instrument, a photo of its label and of the current probe lets us check the match against the manufacturer's documentation.

Frequently Asked Questions

What is the benefit of the A-Scan feature in the Dakota CMX2-DL?

The A-Scan feature in the Dakota CMX2-DL allows the inspector to see the actual ultrasonic waveform. This helps verify that the thickness reading is coming from the back wall of the material and not from noise, pitting, or internal flaws, providing a much higher level of data reliability than numeric-only gauges.

How does the Dakota CMX2-DL handle measurement through paint?

Using the Echo-Echo mode, the Dakota CMX2-DL identifies the time between the first and second echoes from the back wall of the metal. Since both echoes have traveled through the coating twice, the Dakota CMX2-DL can mathematically eliminate the coating's thickness and provide the true metal measurement.

Can the Dakota CMX2-DL store the actual waveforms in its memory?

Yes, the Dakota CMX2-DL is equipped with a DL (Data Logger) that not only stores the numerical thickness reading but can also capture the associated A-Scan waveform for each measurement. This is essential for professional inspection reports and audit trails.

Is the Dakota CMX2-DL (Z-172-0005) suitable for low-temperature environments?

The Dakota CMX2-DL is designed to operate in temperatures as low as -30°C. Its high-contrast LCD and rugged aluminum casing make it ideal for cold weather inspections in northern climates or cryogenic storage facilities.

What software is used to manage data from the Dakota CMX2-DL?

The Dakota CMX2-DL utilizes the Dakota NDT specialized software suite, which allows for the rapid transfer of stored readings and waveforms to a PC. The software enables engineers to create grid-based corrosion maps and professional NDT reports.

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