Olympus 38DL Ultrasonic Thickness Gauge

38DL PLUS: Zero & Calibrate a Dual Probe

38DL PLUS Echo to Echo vs.Thru-Coat

38DL PLUS Product Overview

Transducer Gage Type Mode Thickness Sound Speed Range
Aluminum (sheet)
M202 STD 3 0.3 – 12 mm 6320 m/s
Aluminum (plate)
M109 STD 1 1.25 – 375 mm 6320 m/s
Brass, bronze
M109 HP 1 1.25 – 35 mm 4430 m/s
M1036 STD 1 1.25 – 50 mm 4430 m/s
M109 STD 1 1 – 25 mm 4430 m/s
Copper (sheet)
M202 STD 3 0.2 – 8 mm 4660 m/s
Copper (plate)
M109 STD 1 0.75 – 25 mm 4660 m/ sMay be anisotropic (sound velocity can vary with orientation).
Iron, cast
M1036 STD 1 2.0 – 35 mm 3500 m/s soft 5600 m/s hard
M109 STD 1 1 – 20 mm 3500 m/s soft 5600 m/s hard
Steel, carbon (sheet)
M202 STD 3 0.3 – 10 mm 5890 m/s
M109 STD 1 1.25 – 250 mm 5890 m/s
D7906 STD 1 1 – 50 mm 5890 m/s
Steel Stainless
M109 STD 1 1.25 – 50 mm 5740 m/s
M202 STD 3 0.3 – 10 mm 5740 m/s
D7906 STD 1 1 – 50 mm 5740 m/s
Titanium
M202 STD 3 0.3 – 12 mm 6100 m/s
Acrylic and similar hard plastics
M109 STD 1 0.75 – 50 mm 2730 m/s
M202 STD 2 0.5 – 12.0 mm 2730 m/s
Polyamide
M109 STD 1 0.75 – 35 mm 2200 m/s
M202 STD 2 0.5 – 12.0 mm 2200 m/s
Polyethyene, low density
M1036 HP 1 2 – 75 mm 2080 m/s
M109 STD 1 0.75 – 50 mm 2080 m/s
M202 STD 2 0.5 – 10.0 mm 2080 m/s
Polyethyene, high density
M1036 HP 1 2 – 75 mm 2460 m/s
M109 STD 1 0.75 – 50 mm 2460 m/s
Ceramic, high density
M109 STD 1 1.5 – 75 mm 5631 m/s
M202 STD 3 0.3 – 12 mm 5631 m/s
Composite, fiber epoxy
M2008 HP spec. 4 – 100 mm 3070 m/s
M1036 HP 1 2 – 50 mm 3070 m/s
M109 STD 1 0.75 – 50 mm 3070 m/s
M202 STD 2 0.5 – 12.0 mm 3070 m/s
Fiberglass
M2008 HP spec. 4 – 75 mm 2740 m/s
M1036 HP 1 2 – 25 mm 2740 m/s
M109 HP 1 1 – 15 mm 2740 m/s
Rubber
M1036 STD 1 1.25 – 20 mm 1610 m/s (1480~2300 m/sec)
M109 STD 1 1 -- 10 mm 1610 m/s (1480~2300 m/sec)
M1036 HP 1 2 – 35 mm 1610 m/s (1480~2300 m/sec)
Polystyrene
M109 STD 1 0.75 – 50 mm 2340 m/s
M202 STD 2 0.5 – 12.0 mm 2340 m/s
Teflon
M1036 HP 1 1.25 – 35 mm 1350 m/s
  HP 1 1 – 25 mm 1350 m/s

Thickness Gauge Tutorial

Ultrasonic thickness gauging is a widely used non-destructive technique for measuring the thickness of a material from one side. Just about anything made out of metal, plastic, composite, ceramic, glass, fibreglass, or rubber can be measured. This tutorial provides a basic introduction to the theory and practice of ultrasonic thickness gauging, for both newcomers and more experienced users who would like a review. It covers basic ultrasonic theory, how ultrasonic gages work and how they are used, and covers a number of specific gage applications. Additional reference information including a glossary can be found in the Appendix.

A range of Application Notes covering different coatings can be found here.