72DL PLUS Ultrasonic Thickness Gauge

The 72DL PLUS™ ultrasonic thickness gauge delivers precision thickness measurements at high speed in a portable, easy-to-use device. With fast scanning, advanced algorithms, and our lowest-ever minimum thickness capability, you can confidently measure the thickness of very thin layers in the most challenging manufacturing applications.

72DL PLUS Ultrasonic Thickness Gauge

High-Speed, High-Frequency, High-Precision Measurements

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The 72DL PLUS™ ultrasonic thickness gauge delivers precision thickness measurements at high speed in a portable, easy-to-use device. With fast scanning, advanced algorithms, and our lowest-ever minimum thickness capability, you can confidently measure the thickness of very thin layers in the most challenging manufacturing applications.

72DL PLUS thickness gauges are available in standard frequency and high-frequency models. The high-frequency model can measure ultra-thin materials, including multilayer paint, plastics, metals, and coatings, and the Multilayer Measurement feature can simultaneously display the thickness of up to six independent layers. All 72DL PLUS models have the features to perform fast, accurate thickness measurements:

  • Digital filters enable an excellent signal-to-noise ratio to accurately measure the thickness of noisy materials (e.g., fiberglass)
  • High-resolution touch screen is easy to use and see from various angles
  • PC interface application integrates your workflow, inspection management, alerts, and data analysis so you can continuously improve your product quality

72DL PLUS Features at a Glance

Confidently Control Your Thickness Inspection Process

We’ve made precision ultrasonic thickness gauging easier with smart tools so you can set up, perform, and analyze your inspections faster and with more confidence.

Intuitive User Interface with an Easy-to-View, Large Screen

Precision Ultrasonic Thickness Gauge Built for Industrial Environments

Measure the Thickness of Up to Six Layers for Multilayer Coatings, Paint, Plastics, and Other Materials

Paint thickness gauge

The Multilayer Measurement feature offers multilayer thickness measurements of up to six layers. Measurement settings for each layer—including material, velocity, target thickness ranges, and alarm thresholds—are easily accessible through the configuration workflow and touch-screen controls.

Read our blog post

Workflow

Streamlined Thickness Data Collection and Processing

All 72DL PLUS™ models have built-in datalogging with up to 2 GB of data storage, along with convenient onboard file management features.

Easy Application Setup for Routine Thickness Measurements

For routine applications on simple or complex parts, store and recall settings in the My Applications menu to simplify the device setup process. This reduces manual selection and setting adjustments before each inspection, enabling efficiency and confidence in the measurement quality.

The My Applications menu makes it easy to create custom applications right from the gauge:

  • Predefined configurations for single layer, multilayer, barrier, and reduction rate
  • Menu guides you through each process step, from choosing the configuration for an inspection to setting up the transducer, material, alarms and alarm conditions, measurement mode, and the part map
  • Applications are easy to recall—just turn on the gauge and the instrument shows the My Applications menu as the startup screen

For added flexibility, the PC Interface Application can also be used to create applications and send the files to different gauges on the production floor or across facilities.

Olympus ultrasonic thickness gauge user interface

Get to Work Fast with Standardized Inspection Guidance

With the interactive custom template, inspectors can do their job faster and without stress by following standardized inspection guidance on the gauge. Supervisors can have more security that a job is done right by intelligently monitoring the quality and progress of ongoing thickness inspections.

Track and Visualize Thickness Changes with Versatile Measurement Layouts

All 72DL PLUS models include five measurement layouts, so thickness changes on a test material can be accurately tracked and visualized.

A-Scan: Ultrasonic a-scan

A-Scan

B-Scan: Ultrasonic b-scan

B-Scan

Ultrasonic a-scan b-scan

A/B-Scan

Trend: Trend display for ultrasonic thickness measurements

Trend

Zoom: Zoom display for ultrasonic thickness measurements

Zoom

Improve Product Quality with Inspection Data Management and Analytics

Collect more inspection data to better control product quality. The PC interface application offers data creation, management, sharing, and analysis tools to empower data-driven decisions on the manufacturing production floor. Monitor thickness trends, spot quality issues, and generate reports to help maintain consistent product quality and improve processes.

Applications

Fast Precision Thickness Gauging for Many Applications

The 72DL PLUS™ instrument can be used as a paint thickness gauge, coating thickness gauge, or material thickness gauge. No matter the application, the gauge delivers reliable, lab-quality measurements at high speed to maximize productivity and throughput on the production floor.

Automotive

Paint thickness gauge for cars and other vehicles

Paint thickness gauge for cars

Aerospace

Precision thickness measurements for turbine blade inspections
Coating and material thickness gauge for aerospace

General Manufacturing

  • Measure thin-walled and small-diameter tubing
    • Plastic and metal tubing
    • Medical tubing and catheter wall thickness
  • Coating thickness gauge for manufacturing
    • Single and multilayer coating material thickness measurements
    • Waterproof and antireflective coatings
    • Dry film thickness
    • Thick and thin film thickness measurements
  • Plastic thickness gauge for manufacturing
    • Multilayer plastic thickness measurement of bottles, trays, and tanks
    • Multilayer plastic food containers
  • Material thickness gauge for manufacturing
    • Multilayer material measurements
    • Silicon wafer thickness
    • Metal sheet and plate thickness
    • Gold foil thickness
    • Adhesive tape thickness
    • Polypropylene packaging thickness
Mil thickness gauge for manufacturing

Choose Your Gauge

Choose the Thickness Gauge Model That Best Suits Your Needs

Choose from standard frequency and high-frequency models with the Multilayer Measurement feature, depending on the application.

Standard frequency model: offers reliable thickness measurements at high speed (2 kHz measurement speeds and a 60 Hz display update for A-scan) using single element transducers with a frequency range of 0.2 to 30 MHz

High-Frequency model: includes all the features of the standard frequency model, as well as up to 125 MHz transducer frequency support for measurement of ultra-thin materials

Multilayer Measurement Feature: simultaneously displays up to six multilayer measurements

Supported Feature or Mode
72DL PLUS
Standard Frequency
72DL PLUS
High Frequency
177.8 mm (7 in.) Touch Screen WVGA Display
X
X
60 Hz Display Update for A-Scan
X
X
Measurement Rate up to 2 kHz
X
X
Calibration, Gain, and Blank Controls on Frozen Waveforms
X
X
Multilayer Measurement
X
X
0.2 to 30 MHz Frequency Range
X

Up to 125 MHz Frequency Range for Ultra-Thin Materials

X

Choose Your Transducers

The 72DL PLUS thickness gauge is compatible with our single element ultrasonic transducers with frequencies up to 125 MHz:

Specifications

72DL PLUS™ Specifications

Standard Frequency
High Frequency
Overall Dimensions (W × H × D)
238.76 × 172.72 × 86.36 mm (9.4 × 6.8 × 3.4 in.)
Weight
2.08 kg (4.6 lb)
Power Supply
AC/DC adapter 24 V, or lithium-ion battery 73 Wh
Battery Life
8 hrs
Battery Storage Temperature
-20°C to 40°C (-4°F to 104°F)
Operating Temperature
-10°C to 50°C (14°F to 122°F)
Display
177.8 mm (7 in.) WVGA (800 × 480) PCAP touch, refresh rate 60 Hz

Resolution

Rowspan=3

LOW: 0.1 mm (0.01 in.)
LOW: 25 μm (1 mil=0.001 in.)
STD: 0.01 mm (0.001 in.)
STD: 2.5 μm (0.1 mil=.0.0001 in.)
HI: 0.001 mm (0.0001 in.)
HI: 0.25 μm (0.01 mil=0.00001 in.)
Thickness Range (dependent on probe frequency, probe type, and material)
Steel 0.20 mm to 635 mm (0.008–25 in.)
Plastic 0.0127 mm to 25.4 mm (0.0005 in - 1 in)
Multilayer Measurements
Up to 6 layers
Measurement Rates
1–3 layers 2 kHz max
1–3 layers 1 kHz max
4–6 layers 1 kHz max
4–6 layers 500 Hz max
Calibration
Single- or two-point automatic calibration; zero offset and/or velocity manual adjustment; single-point calibration from frozen waveform
Display Layouts
A-Scan, B-Scan, A/B-Scan, Trend, Zoom, Template, and A-Scan/Template
Capacity
2 GB; ~400,000 thickness readings, 20,000 waveforms
Frequency Range
0.2–30 MHz (-3 dB)
20–125 MHz (-3 dB)
Gain
Automatic or Manual (max 100 dB)
Automatic or Manual (max 80 dB)
IP Rating
Designed and tested for IP65: protected against dust and water jets from all directions
Explosive Atmosphere
MIL-STD-810F, Method 511.4, Procedure I
Shock Tested
MIL-STD-810F, Method 516.5, Procedure I, 6 cycles each axis, 15 g, 11 ms half sine
Vibration Tested
MIL-STD-810F, Method 514.5, Procedure I, Annex C, Figure 6, general exposure: 1 hour each axis

Resources

Application Notes

Insights

Product Resources