Echo Mode Ultrasonic Thickness Gauge Meter OLED Screen Resolution 0.001mm

Echo Mode Ultrasonic Thickness Gauge with OLED Screen and Resolution 0.001mm

Characteristics: 
1. High precision, 0.001mm resolution;
2. Real time A-Scan with adjustable gain, range, blanking etc;
3. Especially fits for ultra-thin work-piece, can accurately and reliably measure down to 0.2 mm;
4. Measure through coatings, e.g. coatings on the substrate, the net thickness of the substrate can be
measured without removing coatings;
5. Unique multiple-wave verify mode, all the thickness values have been checked through 3 to 9 times
of echos, which makes the result more reliable and accurate.

Technical Data:

 
Standard Delivery:

In any ultrasonic gaging application, the choice of gage and transducer will depend on the material to be measured, thickness range, geometry, temperature, accuracy requirements, and any special conditions that may be present. Olympus NDT can provide full details for specific applications. Listed below are the major factors that should be considered.

Material: The type of material and the range of thickness being measured are the most important factors in selecting a gage and transducer. Many common engineering materials including most metals, ceramics, and glass transmit ultrasound very efficiently and can easily be measured across a wide thickness range. Most plastics absorb ultrasonic energy more quickly and thus have a more limited maximum thickness range, but can still be measured easily in most manufacturing situations. Rubber, fiberglass, and many composites can be much more attenuating and often require high penetration gages with pulser/receivers optimized for low frequency operation.

Thickness: Thickness ranges will also dictate the type of gage and transducer that should be selected. In general, thin material are measured at high frequencies and thick or attenuating materials are measured at low frequencies. Delay line transducers are often used on very thin materials, although delay line (and immersion) transducers will have a more restricted maximum measurable thickness due to potential interference from a multiple of the interface echo. In some cases involving broad thickness ranges and/or multiple materials, more than one transducer type may be required.

Geometry: As the surface curvature of a part increases, the coupling efficiency between the transducer and the test piece is reduced, so as radius of curvature decreases the size of the transducer should generally be decreased as well. Measurement on very sharp radiuses, particularly concave curves, may require specially contoured delay line transducers or non-contact immersion transducers for proper sound coupling. Delay line and immersion transducers may also be used for measurement in grooves, cavities and similar areas with restricted access.

Temperature: Common contact transducers can generally be used on surfaces up to approximately 125° F or 50° C. Use of most contact transducers on hotter materials can result in permanent damage due to thermal expansion effects. In such cases, delay line transducers with heat-resistant delay lines, immersion transducers, or high temperature dual element transducers should always be used.

Phase Reversal: There are occasional applications where a material of low acoustic impedance (density multiplied by sound velocity) is bonded to a material of higher acoustic impedance. Typical examples include plastic, rubber, and glass coatings on steel or other metals, and polymer coatings on fiberglass. In these cases the echo from the boundary between the two materials will be phase reversed or inverted with respect to the echo obtained from an air boundary. This condition can normally be accommodated by a simple setup change in the instrument, but if it is not taken into account, readings may be inaccurate.

Accuracy: Many factors affect measurement accuracy in a given application, including proper instrument calibration, uniformity of material sound velocity, sound attenuation and scattering, surface roughness, curvature, poor sound coupling, and backwall non-parallelism. All of these factors should be considered when selected a gage and transducer. With proper calibration, measurements can usually be made to an accuracy of +/- 0.001" or 0.01 mm, and in some cases accuracy can approach 0.0001" or 0.001 mm. Accuracy in a given application can best be determined through the use of reference standards of precisely known thickness. In general, gages using delay line or immersion transducers for Mode 3 measurements are able to determine the thickness of a part most precisely.