The Dakota CMX series comprises three models for ultrasonic thickness and corrosion measurement, with A-Scan, datalogger and Echo-Echo ThruPaint for inspection on painted surfaces.
- Three models : From entry level to professional
- A-Scan : Display of the measured waveform
- Echo-Echo ThruPaint : Measurement through paint and coatings
- Built-in datalogger : Storage of up to 100,000 readings
- Extended range : From 0.75 to 500 mm
- 0.01 mm resolution : Precision on metallic materials
- EN 14127 compliant : European standard for corrosion inspection
The Dakota CMX series is a complete family of ultrasonic thickness gauges designed for corrosion monitoring in industry. Three models — CMX1-DL, CMX2-DL and CMX3-DL — cover different operational needs, from basic inspection through to advanced analysis with colour A-Scan and B-Scan display.
Distinctive features include Echo-Echo ThruPaint mode for measuring through paint without removing the coating, a built-in datalogger for full traceability of inspections, an extended measurement range from 0.75 to 500 mm and automatic calibration of sound velocity. Compatible with Dakota dual-element probes from 2 to 10 MHz for a wide range of applications.
Ultrasonic instruments with A-scan and B-scan
Ideale per la manutenzione preventiva di serbatoi, tubazioni, scambiatori di calore e strutture metalliche sottoposte a corrosione. Strumenti di misura accurata e ripetibile indicati per i contesti Oil & Gas, petrolchimico, navale e aeronautico. Disponibili presso RODER SRL, distributore ufficiale Dakota NDT, con taratura, riparazione e supporto tecnico dedicato.
The Dakota CMX series represents Dakota NDT’s professional level for corrosion thickness measurement with A-Scan and advanced measurement modes for coated surfaces. Available in three models (CMX1-DL, CMX2-DL, CMX3-DL), this range is designed for professional inspectors who work on difficult materials, interpret the ultrasonic waveform and need to document inspection campaigns in refineries, petrochemical plants, storage tanks and critical infrastructure in a structured way.
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The three models in the CMX series
- Dakota CMX1-DL (P/N Z-171-0005): base model with five measurement modes, graphic display, data logger up to 4 GB, scan mode at 250 readings/sec. Without A-Scan.
- Dakota CMX2-DL (P/N Z-172-0005): adds a monochrome A-Scan (VGA greyscale 240×160, 2.4×1.8″), 3 independent gates (start/stop/width/threshold), 110 dB gain range, 50 V boost/cut pulser.
- Dakota CMX3-DL (P/N Z-187-0005): colour version of the CMX2-DL with 60 Hz colour A-Scan, rotatable portrait and landscape views for maximum display area.
All three models share the same hardware architecture and the same core functionality: the A-Scan is the fundamental difference between the CMX1-DL (without) and the CMX2-DL / CMX3-DL (with).
When to choose a CMX gauge
- Corrosion inspection in refineries and petrochemicals with structured API 570 procedures
- Mapping of storage tanks to API 653 with complete documentation and A-Scan archiving
- Difficult materials (cast iron, coarse-grained alloys, composites): the A-Scan is essential for validating readings
- Corrosion under complex coating: PETP, CT and PECT modes cover every scenario
- Inspection with forensic documentation: waveform and screenshots archived as evidence
- Prove-up of simple flaw detection with angle beam probes (available on CMX2-DL/CMX3-DL)
- Asset integrity management with complex trend analysis
The five measurement modes
The CMX series stands out for its five measurement modes dedicated to handling coatings and temperature variation:
- PE (Pulse-Echo): standard for pit & flaw detection on bare material, PE range 0.63 – 1219.2 mm
- EE (Echo-Echo / ThruPaint™): measurement of the metal ignoring coatings up to 2 mm, range 2.54 – 152.4 mm
- EEV (Echo-Echo-Verify / Triple-Echo): accuracy verification with an additional echo, range 1.27 – 25.4 mm
- PETP (Pulse-Echo Temperature Compensation): compensates for temperature variation of the part during measurement, range 0.63 – 1219.2 mm
- CT (Coating Only): measures coating thickness only, range 0.01 – 2.54 mm
- PECT (Pulse-Echo Coating Through): measures coating and metal simultaneously in a single reading
Download documentazione
Official Dakota NDT technical documentation. Files open in a new tab.
For more on PECT mode: What PECT mode is and when it is essential in corrosion measurement. For the Echo-Echo ThruPaint™ comparison: Echo-Echo and ThruPaint™: measuring thickness through paint and coatings.
Caratteristiche principali
A-Scan and waveform analysis
On the CMX2-DL and CMX3-DL the A-Scan comes with:
- Rectified view (full wave, half wave) for the classic flaw detection display
- RF view (Radio Frequency, complete waveform) for fine analysis
- Pulse Repetition Frequency 250 Hz for rapid refresh
- A-Scan refresh rate: 25 Hz monochrome (CMX2-DL), 60 Hz colour (CMX3-DL)
- 3 independent gates with start, stop, width and threshold parameters
- 110 dB gain range for maximum flexibility
- Adjustable damping (50-1500 ohm) for noisy materials
- Pulser boost/cut at a selectable 50 V (range 100-200 V)
- TDG (Time Dependent Gain) built into the transducer table for attenuating materials
- A-Scan portrait/landscape rotation (CMX3-DL only)
Gain control
- AGC (Automatic Gain Control) automatic
- Manual gain with 110 dB range
- 5-position gain selector (CMX1-DL) in 12 dB steps
Data logger 4 GB
- Internal memory: 4 GB
- Log formats: Grid (alphanumeric), Sequential (auto identifier)
- Screen capture: bitmap capture for rapid documentation (.tif format)
- OBSTRUCT entry for inaccessible locations
- 64 programmable user setups, transferable to and from PC
- A-Scan archiving with every reading (CMX2-DL / CMX3-DL)
- Timestamp automatico
Measurement speed
- Manual measurement: 8 readings/sec
- Scan mode CMX1-DL: 250 readings/sec
- Scan mode CMX2-DL / CMX3-DL: 50 readings/sec (with A-Scan active)
- Scan bar display: 33 Hz
- B-Scan display speed: variable 10-200 readings/sec
Calibrazione e allarmi
- Automatic probe calibration (auto probe zero)
- Auto transducer recognition: automatic recognition of the connected transducer
- Auto temperature compensation
- Calibrazione a 1 punto e 2 punti
- Calibration on velocity and on known thickness
- Preset materials, widely configurable
- Visual and audible alarms with Hi/Lo thresholds
- Differential mode and minimal thickness alarm
Specifiche tecniche complete
| Parametro | CMX1-DL | CMX2-DL | CMX3-DL |
|---|---|---|---|
| A-Scan | — | VGA grayscale 240×160 | A-Scan colore |
| A-Scan refresh | — | 25 Hz | 60 Hz |
| Rotazione A-Scan | — | — | Portrait + Landscape |
| Scan mode | 250 letture/sec | 50 letture/sec | 50 letture/sec |
| PE/EE/EEV/PETP/CT/PECT modes | ✓ | ✓ | ✓ |
| Gate indipendenti | — | 3 (start/stop/width/threshold) | 3 (start/stop/width/threshold) |
| Gain range | 60 dB (5-step 12 dB) | 110 dB | 110 dB |
| AGC | ✓ | ✓ | ✓ |
| Data logger | 4 GB | 4 GB | 4 GB |
| Setup utente | 64 | 64 | 64 |
| B-Scan | ✓ | ✓ | ✓ |
| Output | USB-C | USB-C | USB-C |
| Measurement range (all models) | PE 0,63-1219,2 mm / PETP 0,63-1219,2 mm / EE 2,54-152,4 mm / EEV 1,27-25,4 mm / CT 0,01-2,54 mm / PECT 0,63-1219,2 mm (metallo) + 0,01-2,54 mm (rivestimento) |
| Unit | mm o pollici |
| Display CMX1-DL | High-contrast LCD with backlight, 60 Hz |
| Display CMX2-DL | VGA grayscale 240×160 (2,4 × 1,8″) |
| Display CMX3-DL | VGA colore leggibile alla luce diretta, 60 Hz |
| Display modes | Readings, B-Scan, B-Scan + readings, Scan bar, A-Scan (CMX2/3), Large Digits |
| Custodia | Extruded aluminium with nickel-plated end caps sealed with a gasket |
| Peso | 383 g (13.5 oz) with batteries |
| Dimensioni | 165 × 63,5 × 31,5 mm (6,5 × 2,5 × 1,24″) |
| Connettori sonda | Dual LEMO 00 heavy-duty |
| Keypad | Sealed membrane with 12 tactile keys, usable with gloves |
| Output dati | USB-C + software DakMaster™ (Windows PC) |
| Temperatura operativa | -10 a 60 °C (14 a 140 °F) |
| Alimentazione | 2 batterie AA |
| Autonomia | Fino a 200 ore operative |
| Taratura | Tracciabile NIST e MIL-STD-45662 |
| Garanzia | Standard 2 anni |
Compatible probes
The CMX series uses Dakota dual element probes with LEMO 00 connectors. A probe appropriate to the application can be selected from the standard kit:
- Dual element 1 MHz (TXC1M00EP-2): highly attenuating materials, heavy wall
- Dual element 2 MHz: cast iron, coarse grain
- Dual element 5 MHz standard (TXC5M00CP-4): general applications
- Dual element 5 MHz HD (TXC5M00CP-10): corroded and irregular surfaces
- Dual element 5 MHz high temperature (TXC5M00CP-8): surfaces up to 343 °C (650 °F)
- Dual element 7.5 and 10 MHz: thin wall, high resolution
- Small diameter probes: tubes and curved geometries
- Single element angle beam probes for flaw detection prove-up (CMX2-DL / CMX3-DL only)
For selection guidance: How to choose the right ultrasonic transducer for each application.
Applicazioni tipiche
Corrosion inspection in refineries (API 570)
The CMX series is the reference for API 570 inspection campaigns on process piping: the A-Scan makes it possible to validate every reading, PECT and ThruPaint™ modes handle anti-corrosion coatings, and the structured data logger documents the CMLs for trend analysis. See Pipeline corrosion inspection: API 570 and Dakota NDT instruments.
Storage tank inspection (API 653)
For the inspection of tank shells and floors under API 653, the 4 GB memory with A-Scan archiving is essential for documenting campaigns on large shells. See Thickness inspection on storage tanks to API 653.
Corrosion under complex coating
PECT mode is unique to the CMX series: simultaneous measurement of metal and coating in a single reading. Ideal for:
- Rivestimenti multistrato (primer + intermedio + finitura)
- Cathodic protection of buried lines (bitumen / polyethylene coating)
- Simultaneous monitoring of paint integrity and remaining metal thickness
- Serbatoi rivestiti internamente in resina epossidica
Materiali difficili
Cast irons, duplex alloys, coarse-grained steels and metal composites present attenuation and grain noise that make standard measurement difficult. The A-Scan on the CMX2-DL / CMX3-DL makes it possible to distinguish real echoes from noise. For technical strategies: How to improve results on difficult materials with an ultrasonic gauge.
Prove-up of simple flaw detection
The CMX2-DL and CMX3-DL support single element angle beam probes for basic flaw detection prove-up: an economical alternative to a dedicated flaw detector when only occasional checks are required. For complete weld inspection see the Dakota FX70-DL.
Modello CMX1-DL vs CMX2-DL vs CMX3-DL
- CMX1-DL: for those who do not need A-Scan but want all the advanced measurement modes, fast scan mode and a complete data logger
- CMX2-DL: adds monochrome A-Scan and independent gates, optimal for most professional cases
- CMX3-DL: 60 Hz colour A-Scan with portrait/landscape rotation, preferred by professionals who work extensively on waveform analysis
For those looking for the top of the range with higher performance, see the Dakota CMX10-DL.
Scope of supply
- CMX1-DL / CMX2-DL / CMX3-DL gauge (depending on the model chosen)
- Sonda dual element selezionabile
- Ultrasonic couplant gel
- Manuale operativo
- Plastic carrying case
- NIST-traceable calibration certificate
- Batterie AA
- Software DakMaster™ (Windows PC)
- Cavo dati USB-C
Normative e certificazioni
- Factory calibration traceable to NIST and MIL-STD-45662A
- CE Declaration of Conformity
- ASTM E797, EN 14127, EN 15317: compatible with standard ultrasonic measurement procedures
Domande frequenti
Compared with the ZX-3, the CMX1-DL adds the data logger (4 GB vs none), the advanced measurement modes (PETP, CT, PECT), the 60 dB gain range (vs a limited range), 64 user setups and scan mode at 250 readings/sec. For more detail: Dakota ZX-3 vs CMX1-DL: when the basic corrosion gauge is not enough.
Yes. The CMX2-DL and CMX3-DL display the A-Scan in every mode: it is useful on bare materials too, for validating readings, identifying intermediate reflectors and checking signal quality.
Dakota states up to 200 hours of operating life with 2 standard AA batteries, the highest in its class. Intensive use of the colour A-Scan on the CMX3-DL reduces battery life slightly.
Yes. The CMX series supports alphanumeric grid batching (identifying each CML by row/column coordinates) and sequential batching with auto-identifier. Both are managed in DakMaster™ for structured reporting.
For quotations, demonstrations and advice on choosing the CMX model best suited to Your procedures, contact our technical office.
Dakota MX2-DL, CMX2-DL, CMX3-DL
DAKOTANDT MX2 – STRUMENTO
| Part Number | Description |
|---|---|
| Z-149-0000 | MX2-DL A & B Scan Corrosion Gauges PE/EE |
DAKOTANDT CMX2 & CMX3 – INSTRUMENTS
| Part Number | Description |
|---|---|
| Z-172-0000 | CMX2-DL 1 – 20MHz Dual & Single Contact, High Temp & Coating, A&B Scan Corrosion Gauge – PE/EE/CT |
| Z-187-0000 | CMX3-DL 1 – 20MHz Dual & Single Contact, High Temp & Coating, A&B Scan Corrosion Gauge – Colour – PE/EE/CT |
SPARE PARTS / ACCESSORIES (MX2 / CMX2 / CMX3)
| Part Number | Description |
|---|---|
| F-149-0001 | MX/PMX/CMX/MVX/PVX/MMX Gauge Series Instrument Case: Nylon |
| A-149-6002 | MX/PMX/CMX/MVX/PVX/MMX Gauge Series Instrument Case: Rubber |
| A-100-6003 | MX/PMX/CMX/MVX/PVX/MMX Gauge Series Plastic Transit Case |
| N-003-0330 | USB-C to USB TYPE A 3′ Data Cable – V2.0 Gauges |
DUAL TRANSDUCERS (MX2 / CMX2 / CMX3)
| Part Number | Type | Frequency | Diameter | Connector |
|---|---|---|---|---|
| T-104-0000 | Dual Element – Standard | 1 MHz | 1/2″ | Potted (Side) |
| T-102-1000 | Dual Element – Standard | 2.25 MHz | 1/4″ | Potted (Side) |
| T-104-1000 | Dual Element – Standard | 2.25 MHz | 1/2″ | Potted (Side) |
| T-101-2700 | Dual Element – Hi-Damped / EE | 5 MHz | 3/16″ | Potted (Side) |
| T-102-2700 | Dual Element – Hi-Damped / EE | 5 MHz | 1/4″ | Potted (Side) |
| T-104-2700 | Dual Element – Hi-Damped / EE | 5 MHz | 1/2″ | Potted (Side) |
| T-101-3700 | Dual Element – Hi-Damped / EE | 7.5 MHz | 3/16″ | Potted (Side) |
| T-102-3700 | Dual Element – Hi-Damped / EE | 7.5 MHz | 1/4″ | Potted (Side) |
| T-042-2700 | Dual Element – Hi Temp 340°C/650°F / HD / EE | 5 MHz | 1/4″ | Potted (Top) |
DUAL TRANSDUCERS – Specialist plastics / painted materials (CMX2 / CMX3)
| Part Number | Type | Frequency | Diameter | Connector |
|---|---|---|---|---|
| T-101-2900 | Dual Element – Coating Thickness (CT) | 5 MHz | 3/16″ | Potted (Side) |
| T-102-2900 | Dual Element – Coating Thickness (CT) | 5 MHz | 1/4″ | Potted (Side) |
| T-104-2900 | Dual Element – Coating Thickness (CT) | 5 MHz | 1/2″ | Potted (Side) |
| T-101-3900 | Dual Element – Coating Thickness (CT) | 7.5 MHz | 3/16″ | Potted (Side) |
| T-102-3900 | Dual Element – Coating Thickness (CT) | 7.5 MHz | 1/4″ | Potted (Side) |
SINGLE FINGER TIP TRANSDUCERS (CMX2 / CMX3)
| Part Number | Type | Frequency | Diameter | Connector |
|---|---|---|---|---|
| T-4023-1855 | Single Element – Finger Tip Contact | 2.25 MHz | 1/4″ | Microdot (Side) |
| T-4023-2855 | Single Element – Finger Tip Contact | 5 MHz | 1/4″ | Microdot (Side) |
| T-4043-2855 | Single Element – Finger Tip Contact | 5 MHz | 1/2″ | Microdot (Side) |
| T-4023-4855 | Single Element – Finger Tip Contact | 10 MHz | 1/4″ | Microdot (Side) |
| T-5903-2875 | Single Element – Finger Tip Slim Line | 5 MHz | 1/8″ | Microdot (Top) |
| T-5903-4875 | Single Element – Finger Tip Slim Line | 10 MHz | 1/8″ | Microdot (Top) |
TRANSDUCER CABLES
| Part Number | Description |
|---|---|
| N-104-0020 | Transducer Cable: 1.2m (4′) Single Lemo 00 to Microdot |
COUPLANT ULTRASONICO
| Part Number | Description |
|---|---|
| T92015701 | Ultrasonic Couplant, 120ml/4fl oz |
| T92015701-5 | Ultrasonic Couplant, 120ml/4fl oz, Pack of 5 Bottles |
| T92024034-7 | Ultrasonic Couplant, 300ml (10fl oz) |
| T92024034-8 | Ultrasonic Couplant, 500ml (17fl oz) |
| T92024034-9 | Ultrasonic Couplant – Hi-Temp (370°C/700°F); 60ml (2fl oz) |
| T92024034-10 | Ultrasonic Couplant – Hi-Temp (370°C/700°F); 60ml (2fl oz), Pack of 2 |
CALIBRATION BLOCKS
| Part Number | Description |
|---|---|
| X-000-0001 | Calibration Block: 5 Step; 0.1 – 0.5″; 4340 Steel |
| X-000-0002 | Calibration Block: 4 Step; 0.25 – 1.0″; 4340 Steel |
| X-000-0022 | Calibration Block: 5 Step; 2.5 – 12.5mm; 1018 Steel |
| X-000-0021 | Calibration Block: 4 Step; 6.25 – 25mm; 1018 Steel |
| X-000-0005 | Calibration Block Carry Case |
Further information and contacts
Systems division and sensor integration partner : www.roder.it
More information about RODER SRL : about us
Contact for general information : info@roder.it
Contact for information about these products : info@roder.it
The information contained on this web page is provided for information purposes only. Although it has been compiled with the utmost care, it does not constitute a contractual offer or a binding commitment to supply. It may contain transcription, translation or typographical errors. For precise and up-to-date information, please contact our company directly.
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