Ultrasonic Thickness

Ultrasonic thickness gauges are used to measure the thickness of materials which include steel, stainless steel, cast iron, glass, and plastics (including PVCs). Their key use is in detecting uniformity and flaws in material thickness including checking the extent of corrosion in metals.

These gauges can be set to and then measure the velocity or sound of specific types of materials. Some instruments will measure basic types of metals, some instruments will measure with coatings, and will include the coating in the measurement; others will eliminate the coating itself - the gauges are clever enough to measure the thickness and eliminate the 1-2mm of coating that could be on the structure.

Being able to measure the thickness of a given material is particularly important when testing for corrosion in products that are continuously exposed to the elements - for example, light poles, ships, reinforcing-bar in concrete, and just about every kind of pipe.

Here's a summary of the features of some of our most popular gauges:

General Purpose & Corrosion Gauges

Lanyu TM210A
An economical digital ultrasonic thickness gauge which provides both single point readings and a scan/storage mode allowing you to record the scan of your material.
View the Lanyu TM210A product details...

Dakota Ultrasonics MX-3
The MX-3 is a digital ultrasonic thickness gauge. Make single measurements or scan your material and the instrument will lock onto the thinnest point scanned.
View Dakota MX-3product details...

Defelsko Positector UTG
You have a choice of the standard model which is a digital ultrasonic thickness gauge or the advanced model which also provides full A & B scan features.
View the Defelsko Positector UTG product details...

Dakota Ultrasonics MMX-7
Select either large digit mode or B-scan display mode. Also has a “through paint” mode. Has an internal data logger which stores a total of 12,000 readings and B-scans with 64 customer definable setups. Allows you to take readings on a one foot square grid, say, on a 10 x 10 tank, setup 10 columns and 10 rows.
View the Dakota MMX-7 product details...

Dakota Ultrasonics MVX A/B Scan
Full digital ultrasonic thickness gauge, A-scan and B-scan capabilities. Shows waveforms echoes & defects. Can customise your setup like the MMX-7; has an internal data logger which stores a total of 12,000 readings and waveforms with A-scans and B-scans in multiple files with 64 customer definable setups. High power unit and allows user to fine tune for use in more difficult applications.
View the Dakota MVX product details...

Dakota Ultrasonics CMX B Scan
Has all the features of the MMX with the added facility of being able to operate as a coating thickness gauge in coating only mode. High power, auto probe recognition and auto zeros.
View the Dakota CMX product details...

Precision Gauges

Dakota Ultrasonics PX-7 Thin materials
The PX-7 is a basic high precision digital ultrasonic thickness gauge. Accurately measures thin materials from 0.15mm to 25mm. Works at a higher frequency
View the Dakota PX-7 product details...

Dakota Ultrasonics PVX B Scan
A high precision digital ultrasonic thickness gauge which also has B-scan capability. For aerospace industry. High Precision which makes it great for sheet metal work, small diameter areas, turbine and inspection
View the Dakota PVX product details...

Velocity / Nodularity

Dakota Ultrasonics VX
The VX is an ultrasonic velocity gauge and is often used for nodularity testing of material like cast iron. The VX displays the speed of sound (velocity) through the material giving an indication of its consistency. It is used in reverse to normal ultrasonic testing, enter a known thickness to measure density. Eg a cast must be a certain density (velocity) to ensure required strength. This isn’t a material thickness gauge.
View the Dakota VX product details...

 

Notes:

  1. The digital ultrasonic thickness gauge measures a thickness and displays the result as a digital measurement.
    a screenshot from a digital ultrasonic thickness gauge 
     
  2. A-scan allows you to see the detail of a single reading rather than a single number. You can see the complete return signal which helps you verify that the correct echo is being measured and avoid false thin measurements which may be caused by multiple material layers or dirty steel.
    a screenshot from and ultrasonic thickness gauge showing an A-Scan 
     
  3. B Scan is like a fish finder on a boat which draws a picture of the back surface of the material as you scan it allowing you to quickly identify pitting and erosion.
    a screenshot from and ultrasonic thickness gauge showing a B-Scan 

  

Some notes on our two most popular ultrasonic thickness gauges


We keep 2 of the basic units in stock, the Lanyu TM210A and the Dakota MX-3.

Lanyu TM210A is manufactured in China and suits most customers who want a basic ultrasonic. Unit is supplied with a 5mhz probe (transducer). Very popular with steel fabricators, tank manufacturer’s and concrete pumpers who need to test steel and cast iron tubes and elbows. Measurement range is 0.75 to 300mm.

Dakota MX-3 is manufactured in the USA and suits most customers who also want a basic ultrasonic. Unit is supplied with a choice of either a 1mhz, 5mhz or 7.5mhz probe transducer). Very popular, as has a slightly better resolution than the TM210. Measurement is range 0.63 to 500mm.

  • 1.0mhz probe measures plastic up to 30mm
  • 5.0mhz probe measures most materials, including thin plastic.
  • 7.5mhz probe measure high tensile steel. Commonly referred to as the Exxon Specification.


Selection from our range of more advanced models, summarised above, can be quite challenging. Call us on 02 4954 3900 (+61 2 4954 3900) and we'll help you select the right ultrasonic thickness gauge for your needs.

 

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