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Measure Material Thickness from One Side — Even Through Existing Coatings
The Elcometer MTG4 Ultrasonic Material Thickness Gauge provides non-destructive thickness measurement when only one side of a component is accessible. Using ultrasonic technology, it can measure a wide range of materials including steel, stainless steel, aluminium, cast iron, plastics, glass, epoxies, and ceramics, making it suitable for corrosion assessment, maintenance inspection, and general material thickness testing.
A major advantage of the MTG4 over basic ultrasonic gauges is its Echo-Echo ThruPaint™ mode. With a compatible coating-thickness transducer, the gauge can ignore the applied coating and determine the thickness of the underlying material without removing the paint. This can save considerable preparation time when inspecting coated tanks, pipes, structures, and equipment.
Measure When Only One Side Is Accessible
Ultrasonic thickness measurement does not require access to the opposite side of the component. The transducer sends an ultrasonic pulse through the material and measures the returning echo from the material boundary, allowing wall thickness to be determined without cutting or dismantling the component.
Measure Through Paint with Echo-Echo ThruPaint™
In Echo-Echo ThruPaint™ (EE) mode, the MTG4 measures the substrate while excluding the coating from the displayed thickness. This is particularly useful for inspecting painted steel and other coated components where removing the coating solely to obtain a thickness reading would be undesirable. A compatible damped coating-thickness transducer is required for this mode.
Pulse-Echo Mode for Corrosion and Flaw Inspection
Pulse-Echo (PE) mode measures from the transducer contact surface to the material’s back wall. It is well suited to general wall-thickness inspection and detecting areas where corrosion, pitting, erosion, or material loss may have reduced the original thickness.
Wide 0.63–500mm Measurement Range
In Pulse-Echo mode, the MTG4 has a nominal measurement range of 0.63–500mm (0.025–19.999in), depending on the material and transducer selected. Pulse-Echo accuracy is ±0.1mm from 0.63–19.99mm and ±0.5% from 20–500mm.
39 Pre-Set Material Velocities
Because ultrasonic measurement depends on the speed of sound through the material, correct material selection is essential. The MTG4 simplifies setup with 39 factory-programmed material options, including commonly inspected materials such as aluminium, steel, stainless steel, cast iron, Plexiglas, PVC, polystyrene, and polyurethane.
1-Point Calibration for Known Materials
When an uncoated sample of the material with a known thickness is available, the MTG4 can be calibrated using its 1-point calibration function. This allows the gauge to be matched more closely to the actual material being inspected rather than relying solely on a generic factory material setting.
Velocity Mode for Unknown Materials
The MTG4 also provides Velocity Mode with a range of 1,250–10,000m/s (0.0492–0.3937in/µs). When the thickness of a sample is known, this function can be used to determine its ultrasonic velocity, helping establish the appropriate setting for subsequent measurements of the same material.
USB Data Transfer to ElcoMaster®
Individual measurements can be transferred by USB to ElcoMaster® software for further analysis and inclusion with other coating and inspection data. This provides a practical route from field measurement to documented inspection reporting without requiring a more advanced data-logging gauge.
Choose the Correct Transducer for the Application
The transducer has a major influence on ultrasonic measurement performance. Elcometer offers different dual-element transducers for particular materials, thickness ranges, geometries, and measurement modes. The MTG4-TXC package includes a 5MHz ¼-inch right-angle dual-element transducer, while alternative compatible transducers can be selected for specialized applications.
Designed for Recognized Ultrasonic Thickness Standards
The Elcometer MTG series supports ultrasonic material thickness measurements performed in accordance with recognized standards including ASTM E797, EN 14127, and EN 15317.
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.
Delay Lines
Each gauge is supplied with 9mm and 12mm acrylic delay lines suitable for measuring on steel, aluminum and titanium.
If measuring on thin plastics using Plastic Mode (PLAS), a graphite delay line must be used. These are available to purchase as optional accessories.Part NumberDescriptionT92016528Acrylic Delay Line; 1/4 Dia x 9mmT92016529Acrylic Delay Line; 1/4 Dia x 12mmT92023853-4Graphite Delay Line; 1/4 Dia x 3/16″All transducers are supplied with a calibration certificate
HD—Highly damped Transducer
CT—Damped Coating Thickness Transducer
S—–Standard undamped Transducer
STANDARDS MTG: ASTM E797, EN 14127, EN15317STANDARDS PTG: EN14127, EN15317
Measure Material Thickness from One Side — Even Through Existing Coatings
The Elcometer MTG4 Ultrasonic Material Thickness Gauge provides non-destructive thickness measurement when only one side of a component is accessible. Using ultrasonic technology, it can measure a wide range of materials including steel, stainless steel, aluminium, cast iron, plastics, glass, epoxies, and ceramics, making it suitable for corrosion assessment, maintenance inspection, and general material thickness testing.
A major advantage of the MTG4 over basic ultrasonic gauges is its Echo-Echo ThruPaint™ mode. With a compatible coating-thickness transducer, the gauge can ignore the applied coating and determine the thickness of the underlying material without removing the paint. This can save considerable preparation time when inspecting coated tanks, pipes, structures, and equipment.
Measure When Only One Side Is Accessible
Ultrasonic thickness measurement does not require access to the opposite side of the component. The transducer sends an ultrasonic pulse through the material and measures the returning echo from the material boundary, allowing wall thickness to be determined without cutting or dismantling the component.
Measure Through Paint with Echo-Echo ThruPaint™
In Echo-Echo ThruPaint™ (EE) mode, the MTG4 measures the substrate while excluding the coating from the displayed thickness. This is particularly useful for inspecting painted steel and other coated components where removing the coating solely to obtain a thickness reading would be undesirable. A compatible damped coating-thickness transducer is required for this mode.
Pulse-Echo Mode for Corrosion and Flaw Inspection
Pulse-Echo (PE) mode measures from the transducer contact surface to the material’s back wall. It is well suited to general wall-thickness inspection and detecting areas where corrosion, pitting, erosion, or material loss may have reduced the original thickness.
Wide 0.63–500mm Measurement Range
In Pulse-Echo mode, the MTG4 has a nominal measurement range of 0.63–500mm (0.025–19.999in), depending on the material and transducer selected. Pulse-Echo accuracy is ±0.1mm from 0.63–19.99mm and ±0.5% from 20–500mm.
39 Pre-Set Material Velocities
Because ultrasonic measurement depends on the speed of sound through the material, correct material selection is essential. The MTG4 simplifies setup with 39 factory-programmed material options, including commonly inspected materials such as aluminium, steel, stainless steel, cast iron, Plexiglas, PVC, polystyrene, and polyurethane.
1-Point Calibration for Known Materials
When an uncoated sample of the material with a known thickness is available, the MTG4 can be calibrated using its 1-point calibration function. This allows the gauge to be matched more closely to the actual material being inspected rather than relying solely on a generic factory material setting.
Velocity Mode for Unknown Materials
The MTG4 also provides Velocity Mode with a range of 1,250–10,000m/s (0.0492–0.3937in/µs). When the thickness of a sample is known, this function can be used to determine its ultrasonic velocity, helping establish the appropriate setting for subsequent measurements of the same material.
USB Data Transfer to ElcoMaster®
Individual measurements can be transferred by USB to ElcoMaster® software for further analysis and inclusion with other coating and inspection data. This provides a practical route from field measurement to documented inspection reporting without requiring a more advanced data-logging gauge.
Choose the Correct Transducer for the Application
The transducer has a major influence on ultrasonic measurement performance. Elcometer offers different dual-element transducers for particular materials, thickness ranges, geometries, and measurement modes. The MTG4-TXC package includes a 5MHz ¼-inch right-angle dual-element transducer, while alternative compatible transducers can be selected for specialized applications.
Designed for Recognized Ultrasonic Thickness Standards
The Elcometer MTG series supports ultrasonic material thickness measurements performed in accordance with recognized standards including ASTM E797, EN 14127, and EN 15317.
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.
Delay Lines
Each gauge is supplied with 9mm and 12mm acrylic delay lines suitable for measuring on steel, aluminum and titanium.
If measuring on thin plastics using Plastic Mode (PLAS), a graphite delay line must be used. These are available to purchase as optional accessories.Part NumberDescriptionT92016528Acrylic Delay Line; 1/4 Dia x 9mmT92016529Acrylic Delay Line; 1/4 Dia x 12mmT92023853-4Graphite Delay Line; 1/4 Dia x 3/16″All transducers are supplied with a calibration certificate
HD—Highly damped Transducer
CT—Damped Coating Thickness Transducer
S—–Standard undamped Transducer
STANDARDS MTG: ASTM E797, EN 14127, EN15317STANDARDS PTG: EN14127, EN15317
