72DL PLUS


    72DL PLUS Ultrasonic Thickness Gauge


    72DL PLUS™ Ultrasonic Thickness Gauge
    High-Speed, High-Frequency, High-Precision Measurements


    The Olympus 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 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 Software 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 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

    72DL PLUS Features at a Glance


    Rugged: designed for IP65

    Large, clear screen: 177.8 mm (7 in.) high-resolution touch screen WVGA display

    Versatile layouts: A-Scan, B-Scan, A/B-Scan, Trend, and Zoom measurement layouts provide an accurate picture of thickness changes

    Customizable: Standard Frequency model and High-Frequency model—with or without the Multilayer Measurement Software option

    Long battery life: up to 8 continuous hours

    Efficient data management: internal data logging and PC Interface Application speed up data collection and review

    Connected: supports wireless LAN and Bluetooth®

    Cloud enabled: wireless connection to the Olympus Scientific Cloud™ (OSC) and compatible OSC apps

    Easy application setup: create custom applications to reduce device setup time for routine inspections

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

    Wide viewing angle for outstanding visibility in most ambient conditions

    177.8 mm (7 in.), full color touch screen provides access to the setup and measurement layouts

    Guided configuration makes it easy to change the settings based on your needs

    An Ultrasonic Thickness Gauge Built for Industrial Environments
    Designed for IP65 to protect against dust and moisture
    Drop tested (MIL-STD-810G) to protect against falls and reduce the need for costly repairs
    Takes reliable measurements in a wide operating temperature range of –10°C to 50°C (14°F to 122°F)
    Portable for the production floor, weighing 2.1 kg (4.6 lb)
    Easy to control from the touch screen, key controls, and adjustment knob

    Can be used indoors and outdoors, on a work surface, or using a four-point chest harness or shoulder strap


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

    The Multilayer Measurement Software 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.

    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.


    Paint thickness gauge for cars and other vehicles
    Accurate automotive paint thickness measurements
    Measure up to 6 paint layers
    Simultaneously display all paint layer measurements at once



    Fast measurements for turbine blade manufacturing
    Turbine blade inspection and repair
    Aircraft window inspection
    Aerospace paint and coatings
    Single and multilayer coating material thickness on composite aircraft
    Measure coatings on composite aircraft radomes
    Aluminum composite panel measurement



    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


    72DL PLUS™ Specifications

    Standard FrequencyHigh Frequency
    Overall Dimensions (W × H × D)238.76 × 172.72 × 86.36 mm (9.4 × 6.8 × 3.4 in.)
    Weight2.08 kg (4.6 lb)
    Power SupplyAC/DC adaptor 24 V, or lithium-ion battery 73 Wh
    Battery Life8 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)
    Display177.8 mm (7 in.) WVGA (800 × 480) PCAP touch, refresh rate 60 Hz
    ResolutionLOW: 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 (0.0008–25 in.)Plastic 0.0127 mm to 25.4 mm (0.0005 in - 1 in)
    Multilayer MeasurementsUp to 6 layers
    Measurement Rates1–3 layers 2 kHz max1–3 layers 1 kHz max
    4–6 layers 1 kHz max4–6 layers 500 Hz max
    CalibrationSingle- or two-point automatic calibration; zero offset and/or velocity manual adjustment; single-point calibration from frozen waveform
    Display LayoutsA-Scan, B-Scan, A/B-Scan, Trend, and Zoom
    Capacity2 GB; ~400,000 thickness readings, 20,000 waveforms
    Frequency Range0.2–30 MHz (-3 dB)20–125 MHz (-3 dB)
    GainAutomatic or Manual (max 100 dB)Automatic or Manual (max 80 dB)
    IP RatingDesigned and tested for IP65: protected against dust and water jets from all directions
    Explosive AtmosphereMIL-STD-810F, Method 511.4, Procedure I
    Shock TestedMIL-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

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