Measurement technology

EMAT thickness measurement

Electromagnetic acoustic transducers generate and receive ultrasonic waves through electromagnetic interaction near the material surface, so no liquid acoustic couplant is required. The exact transduction mechanism and material suitability depend on transducer design and material properties.

1440 × 1080 The sensor in contact with a coated steel surface A close-up of the measurement head against real coated steel, with the lift-off visible. A diagram of the EMAT principle may accompany it, but must not replace the photograph. media placeholder

What the method makes possible

Couplant-free measurement.
Reduced preparation requirements in suitable conditions.
Operation through validated coating and lift-off combinations.
A-scan for signal review where the product configuration supports it.

Operating envelope

Current ALTCER validated scope

This is the envelope of the ALTCER configuration, not the limit of EMAT as a method. Anything outside it is outside what ALTCER publishes, even where the physics of the method may extend further.

Materials: Exact validated grades and classes — pending Claims & Evidence Registry.
Thickness range: Under stated conditions — pending.
Total lift-off / coating: Pending.
Surface conditions: Pending.
Temperature: Pending.

Limitations

Materials not validated in the current ALTCER configuration are outside the published envelope, even where EMAT as a technology may support other materials or transducer designs.
A measurement is accepted only within validated total lift-off and coating limits.
Curvature, heavy scale, laminations, geometry and other surface or material conditions may reduce signal quality or prevent a valid reading.
A reading rejected by signal-quality criteria is recorded as not accepted. It is never converted into a thickness value for reporting.

Calibration and verification

Calibration and verification wording is derived from the actual procedure: a calibration certificate, a reference-block check or a field verification is described precisely for what it covers.

A calibration record for an instrument is not certification of the whole aerial system. ALTCER does not present it as one.

Standards context

ASTM E1816 may be cited as a method reference where appropriate. Other documents — API 653, EEMUA 159, ISO or EN standards — are named only where their relationship to the actual inspection scope is documented. Application context is not the same thing as product compliance.

How EMAT measurement works, what it is validated for, and where it does not apply. Demo content. Structure only – every figure and claim on this staging site is invented.

Where the method is implemented

960 × 640 Colibri360, real hardware in operation The actual product, photographed in use. No studio render, no CGI. media placeholder

Colibri360

Drone-mounted EMAT thickness gauge with the sensor on a rotary mast, for measuring metal structures without scaffolding or rope access.

2 – 60 mm Measurable thickness — S355, mill scale, lift-off up to 2 mm, 20 °C
0.08 mm Measurement accuracy — S355 reference block, lift-off 1 mm, 20 °C
3 mm Validated lift-off — Coated carbon steel, coating up to 3 mm

Colibri360 details

960 × 640 EMALTUS, real hardware in operation The actual product, photographed in use. No studio render, no CGI. media placeholder

EMALTUS

EMAT measurement module for integration into a third-party aerial platform, delivered with a defined integration envelope and responsibility split.

1.4 kg Module mass — Sensor, mast and controller
22 – 26 V Input voltage — DC, platform supplied
90 W Peak power — During acquisition

EMALTUS details

Ask whether your material is in the envelope

Send the grade, the coating and the surface condition. The answer states the conditions, or says it is outside what is validated.

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