Elcometer MTG & PTG Range Ultrasonic Thickness Gauges | Data Sheet

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 0.15mm (0.006") to 500mm (20").

Easy

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.

Accurate

Both the MTG & PTG range have a measurement accuracy of ±1% across its full range of 0.15mm (0.006") PTG up to 500m (20)" MTG. 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.

Efficient

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, PTG6, MTG8 & PTG8 also have high speed scan mode allowing 140+ readings per minute to be taken on large surface areas.

Powerful

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 Apps, data can be downloaded via USB or Bluetooth® direct to PC, iOS* or Android™ mobile devices for instant report generation.

Rugged

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.

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):

Also 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.

Velcocity 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.

The PTG range of Ultrasonic thickness gauges is accurate to ±1% from 0.15mm (0.006") to 25mm (1.00").

The Elcometer MTG & PTG range is easy to use and accurate to ±1%. Offering 4, 8, & 16 Hz, the gauges are fast and incredibly powerful. Dust and waterproof equivalent to IP54, the MTG & PTG range is suitable for use in the harshest of environments.

Data logging versions can store up to 100,000 readings in Scan mode and up to 1,000 Alpha-numeric, Sequential or Grid batches.

MTG2

With automatic transducer recognition which ensures correct probe identification even when the transducer is changed, a measurement rate of 4Hz (4 readings per second) and integral zero disc ensuring maximum accuracy of ±1%, the MTG2 is ideal for taking basic thickness measurements.

The MTG2 is supplied complete with 5MHz, ¼” transducer and is pre-calibrated for measuring on steel only with a thickness range of up to 500mm (20”) in Pulsed-Echo (P-E) mode.

Compatible with ElcoMaster™ software, individual readings can be downloaded via USB to PC or similar device for further analysis.

MTG4

With a choice of calibration options and measurement modes, the MTG4 is ideal for taking readings on a wide range of coated and uncoated materials.

As well as all the features of the MTG2, the MTG4 has two calibration options. Using an uncoated sample of test material of a known thickness, the gauge can be calibrated using 1-Point calibration. Alternatively, the user can select one of 39 pre-set materials stored within the gauge including; aluminium, steel, stainless steel, cast iron, plexiglass, PVC, polystyrene and polyurethane.

The gauges have all the features and functionality necessary to measure material thickness and velocity on virtually any material in a wide range of applications.

Echo-Echo ThruPaintTM (E-E) measurement mode enables readings to be taken on coated materials with a thickness range up to 25.4mm (1”). In Echo-Echo ThruPaint™ mode, the coating thickness is ignored and the material thickness from the top surface of the material to the material density boundary is displayed.

Compatible with ElcoMaster™ software, individual readings can be downloaded via USB to PC or similar device for further analysis.

MTG6

With a choice of calibration options, measurement modes – including high speed scan mode, display options and datalogging, the MTG6 is ideal for taking readings on a wide range of coated and uncoated materials and downloading data for further analysis and reporting.

As well as all the features of the MTG2 & MTG4, the MTG6 has additional calibration options; 2-Point, Velocity and known Thickness Value.

The MTG6 offers Velocity Mode (VM) which is ideal for determining the homogeneity of a material/alloy and the correct velocity of a material for calibration.

Using Scan Mode, readings can be taken at a rate of 16Hz (16 readings per second) over a large surface area. When the transducer is lifted off the surface, the average, lowest and highest thickness value is displayed making scan mode ideal for checking a sample’s overall uniformity.

With a user definable display, users can choose to view readings, statistical information, bar graph - an analogue representation of the current reading together with the highest (Hi) , lowest (Lo); and average (x), reading or a run chart; a trend graph of the last 20 readings.

The MTG6 has a single batch gauge memory and can store up to 1,500 readings. Compatible with both ElcoMaster™ and ElcoMaster™ Mobile Apps, readings can be downloaded via USB or Bluetooth® to PC, iOS or Android™ devices for further analysis and reporting.

MTG8

The MTG8 is the top of the range gauge with all the features and functionality necessary for measuring material thickness and velocity on virtually any material and for a wide range of applications.

As well as all the features of the MTG2, MTG4 and MTG6, the MTG8 allows users to store into memory up to three calibrations. Once saved the user can select a calibration memory without the need to re-calibrate the gauge, ideal for users who are measuring a variety of materials or thicknesses. Using the gauge’s alpha-numeric function, calibration memories can be re-named to suit the calibration setting.

The MTG8 has user definable upper and lower limits with audible and visual pass/fail warnings. Limits can be set for individual readings or for each batch. If a measurement is taken which falls outside set limits, the reading value and the limit icon turn red, the red LED flashes and the alarm beeps providing immediate indication of problem areas.

The MTG8 has Differential Mode; once a user defined nominal thickness value is set, the gauge displays the measured thickness together with the variation from the set nominal value thus indicating areas of the material which are thinner or thicker than expected.

The MTG8 offers B-Scan, a time based, cross sectional 2 dimensional graphical view of the material under test, ideal for relative depth analysis. The zoom of the B-Scan reading can either be set to automatic or can be defined by the user to focus on areas of interest.

The MTG8 can store 100,000 readings in up to 1,000 sequential or grid type batches. Using grid batching, readings are stored in a spreadsheet type format. The Obst feature, allows the user to record an obstruction within the grid.

Compatible with ElcoMaster™, PC & Mobile Apps, readings can be downloaded via USB or Bluetooth® to PC, iOS or Android™ devices for further analysis and reporting.

PTG6

When precision is key, the PTG6 has a measurement range of 0.15mm(0.006”) to 25mm (1.000”) with ±1% accuracy, across three measurement modes, Echo-Echo ThruPaint™, Interface Echo (I-E) and Plastic Mode (PLAS). This gauge allows users to take measurements with pinpoint accuracy.

The PTG series of ultrasonic precision thickness gauges have ThruPaint™ technology allowing the accurate measurement of the thickness of extremely thin substrates.

The PTG6 has a number of calibration options. Using an uncoated sample of test material of a known thickness, the gauge can be calibrated using 1-Point calibration. Alternatively, the user can select one of 39 pre-set materials stored within the gauge including; aluminium, steel, stainless steel, cast iron, plexiglass, PVC, polystyrene and polyurethane.

The PTG6 also offers the additional calibration options of 2-Point & Velocity.

Compatible with ElcoMaster™ software, individual readings can be downloaded via USB to PC or similar device for further analysis.

PTG8

The PTG8 is the top of the range gauge with all the features and functionality necessary for measuring, with precision, material thickness on virtually any material.

With a user definable display, users can choose to view readings, statistical information, bar graph together with the highest (Hi); lowest (Lo); and average (x); reading or a run chart; a trend graph of the last 20 readings.

In Scan Mode, readings can be taken at a rate of 16Hz (16 readings per second) over a large surface area. When the transducer is lifted off the surface, the average, lowest and highest thickness values are displayed.

The PTG8 allows users to store into memory up to three calibrations. Once saved the user can select a calibration without the need to re-calibrate the gauge, ideal for users who are measuring a variety of materials or thicknesses.

Using the gauge’s alpha-numeric function, calibration memories can be re-named to suit the calibration setting.

The PTG8 has user definable upper and lower limits with audible and visual pass/fail warnings. Limits can be set for individual readings or for each batch. If a measurement is taken which falls outside set limits, the reading value and the limit icon turns red, the red LED flashes and the alarm beeps.

The PTG8 has Differential Mode; once a user defined nominal thickness value is set, the gauge displays the measured thickness together with the variation from the set nominal value thus indicating areas of the material which are thinner or thicker than expected.

The PTG8 offers B-Scan, a time based, cross sectional 2 dimensional graphical view of the material under test, ideal for relative depth analysis. The zoom of the B-Scan reading can either be set to automatic or can be defined by the user to focus on areas of interest.

The PTG8 can store 100,000 readings in up to 1,000 sequential or grid type batches. Using grid batching, readings are stored in a spreadsheet type format. The Obst feature, allows the user to record an obstruction within the grid.

Compatible with ElcoMaster™, PC & Mobile Apps, readings can be downloaded via USB or Bluetooth® to PC, iOS or Android™ devices for further analysis and reporting.

Model Comparision

1 Internet connection required
2 The Elcometer MTG & PTG range is extendable within 60 days from date of purchase, free of charge to two years via www.elcometer.com
3 User selectable default setting in scan mode is 16 Hz
4 Dependent on the material being measured and the transducer being used
5 Whichever is the greater
6 See page 22 for lists of preset materials
7 MTG supplied with 5MHz 1/4" right angle transducer, PTG supplied with 15MHz 1/4"Microdot right angle single element transducer
8 Supplied with Alkaline, Lithium and rechargable can be used with the gauges, continuous use at 1 reading per second
STANDARDS MTG: ASTM E797, EN 14127, EN15317
STANDARDS PTG: EN14127, EN15317

What connection does it have?
Potted: The transducer is strongly secured to the cable at the factory.
Microdot: The transducer is attached using two small screw type connectors, enabling replacement of the cable in case of accidental damage or wear.
All transducers are intelligent; when connected to the MTG or PTG range the gauge instantly recognizes what transducer has been attached to the gauge.
Selecting the right transducer for your application is essential to maximize performance.

Transducers

Elcometer NDT offer a state-of-the-art range of Ultrasonic Gauge transducers

Choosing the right frequency and diameter

High frequency transducers are ideal for precision measurement because the pulse they emit is highly focused, reducing the risk of return echoes outside of the measurement area. The high frequency and shorter wavelength also lends itself to measuring thin materials.

Low frequency transducers are designed for materials that absorb sound like plastics or composites. The pulse penetrates deeply into the material ensuring a strong return echo and therefore a measurement. This high penetration also means that they are suitable for high material thicknesses.

Larger diameter probes feature larger crystals which transmit and receive the sound wave. A large crystal transmitter will produce a larger sound wave and a larger receiving crystal will be more sensitive.

As a result, larger transducers tend to have better penetration characteristics than the smaller types. If this extended range is not required, the smaller transducers can be placed more precisely and in hard to reach areas such as narrow grooves in a material.