Transducer Range Charts

Generalized Material - Transducer Range Charts

Ultrasonic Thickness Gauge Tutorial

The tables in this section list some typical materials and thickness ranges that can be measured with ultrasonic gauges, using specific transducers and appropriate instrument setups. These tables are intended only as a general guideline and list only some of the most common applications for metals and plastics. There are many more possibilities. If you need information regarding a specific thickness measurement that is not listed here, please contact Olympus.

All thickness ranges are approximate. The actual measurement range in a given case will always depend on instrument setup as well as specific material properties such as part geometry, surface condition, and microstructure. Material is assumed to be at ambient temperature. In all materials, attenuation increases with temperature, so at elevated temperatures the maximum measureable thickness will normally be lower, especially in plastics.

(1) English units

Notes: All thickness ranges are approximate. The actual measurement range in a given case will always depend on instrument setup as well as specific material properties such as part geometry, surface condition, and microstructure. The maximum thickness in plastics in Mode 1 measurements will vary depending on the type of plastic, so only a minimum is listed. These charts cover only some of the most common transducers and measurement situations. There are many other possibilities. For details, please contact Olympus.

Transducer
(frequency,
diameter, type)

Measurement
Mode

Range (metal)

Range (plastic)

20 MHz, 0.125 in.
contact

0.020 in. –1.5 in.

0.008 in. minimum

10 MHz, 0.25 in.
contact

0.030 in. –10 in.

0.010 in. minimum

5 MHz, 0.5 in.
contact

0.050 in. –20 in.

0.025 in. minimum

2.25 MHz, 0.5
contact

0.080 in. –20 in.

0.050 in. minimum

1 MHz, 1 in.
contact

0.150 in. –25 in.

0.100 in. minimum

0.5 MHz, 1 in.

0.250 in. –25 in.

0.200 in. minimum

20 MHz, 0.125 in.
delay line

0.010 in. –0.400 in.

0.005 in. - 0.200 in.

20 MHz, 0.125 in.
delay line

0.008 in. –0.200 in.

10 MHz, 0.25 in.
delay line

0.020 in. –0.750 in.

0.012 in. –0.250 in.

10 MHz, 0.25 in.
delay line

0.010 in. –0.500 in.

5 MHz, 0.5 in.
delay line

0.050 in. –1.00 in.

0.040 in. –0.500 in.

5 MHz, 0.5 in.
delay line

0.050 in. –0.500 in.

2.25 MHz, 0.5 in.
delay line

0.080 in. –1.00 in.

0.060 in. –0.500 in.

2.25 MHz, 0.5 in.
delay line

0.060 in. –0.500 in.

10 MHz, 0.3 in.
dual

dual

0.020 in. –1.00 in.

5 MHz, 0.4 in.
dual

dual

0.040 in. –20 in.

2 MHz, 1.0 in.
dual

dual

0.150 in. –25 in.

(2) Metric units

Transducer
(frequency,
diameter, type)

Measurement
Mode

Range (metal)

Range (plastic)

20 MHz, 3 mm
contact

0.5–40 mm

0.2 mm
minimum

10 MHz, 6.25 mm
contact

0.75–250 mm

0.25 mm
minimum

5 MHz, 12.5 mm
contact

1.25–500 mm

0.6 mm
minimum

2.25 MHz, 12.5 mm
contact

2.0–500 mm

1.25 mm
minimum

1 MHz, 25 mm
contact

3.75–650 mm

2.5 mm
minimum

0.5 MHz, 25 mm
contact

6.0–650 mm

5.0 mm
minimum

20 MHz, 3 mm
delay line

0.25–10.0 mm

0.125–5.0 mm

20 MHz, 3 mm
delay line

0.2–5.0 mm

10 MHz, 6.25 mm
delay line

0.5–20 mm

0.3–6.25 mm

10 MHz, 6.25 mm
delay line

0.25–12.5 mm

5 MHz, 12.5 mm
delay line

1.25–25.0 mm

1.0–12.5 mm

5 MHz, 12.5 mm
delay line

1.25–12.5 mm

2.25 MHz, 12.5 mm
delay line

2.0–25.0 mm

1.5–25.0 mm

2.25 MHz, 12.5 mm
delay line

1.5–12.5 mm

10 MHz, 7 mm
dual

dual

0.5–25.0 mm

5 MHz, 10 mm
dual

dual

1.0–500 mm

2 MHz, 25 mm
dual

dual

3.75–635 mm

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