Measurement Modes Explained

Ergonomic, rugged, accurate and easy to use, the Elcometer MTG & PTG range of ultrasonic Material and Precision thickness gauges is ideal for measuring and recording material thickness from just 0.2mm (0.008") to 500mm (20").



The MTG & PTG range of ultrasonic thickness gauges have been designed specifically to make them easy to use, calibrate, take readings and create inspection reports.


Both the MTG & PTG range have a measurement accuracy of ±1% across its full range.
Accurate and repeatable readings can be taken on smooth, rough and curved, coated or uncoated surfaces. The stability indicator provides a visual indication of both the strength and reliability of the ultrasonic signal.


Whilst the MTG2 and MTG4 have a set measurement repetition rate of 4Hz (4 readings per second), the MTG6, PTG6, MTG8 & PTG8 have user selectable measurement rates of 4, 8 and 16 Hz (4, 8 or 16 readings per second). 


The MTG6, MTG8 & PTG8 have data-logging functionality. The MTG6 can store up to 1,500 readings in a single batch whilst the MTG8 & PTG8 store up to 100,000 readings in up to 1,000 sequential or grid type batches, with alpha-numeric batch naming. Compatible with ElcoMaster® and ElcoMaster® Mobile App, data can be downloaded via USB or Bluetooth® direct to PC, iOS* or Android™ mobile devices for instant report generation.


With a scratch and solvent resistant display, sealed, heavy duty and impact resistant design - dust and waterproof equivalent to IP54 - the MTG and PTG range is suitable for use in the harshest of environments.


*Compatible with iPod, iPhone and iPad.




The Elcometer NDT MTG & PTG range has a number of  measurement modes available to help the user establish the most accurate thickness value.

The modes available vary between models but normally increase as the model number increases.



  Pulsed - Echo Mode (P-E):
Ideal for pit and flaw detection, the total thickness from the base of the transducer to the material density boundary (typically the back-wall) is measured.
  Echo - Echo ThruPaint™ Mode (E-E):
Sometimes known as ThruPaint™ mode, the coating thickness is ignored and the material thickness from the top surface of the material to the material density boundary (typically the back wall) is measured. To use Echo-Echo ThruPaint™ mode, a high damped, coating thickness transducer is required.
  Interface Echo (I-E):
A highly accurate measurement mode, Interface Echo displays the total thickness from the top surface to the material density boundary.
  Plastic Mode (PLAS):
A mode specifically used for measuring very thin plastics. A special graphite delay line accessory is required for this mode.
  Velocity Mode (VM):
Velocity mode measures the speed of sound of materials and is ideal for determining the homogeneity of a material/alloy and the correct velocity of a material for calibration.