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Industrial Solutions
Thickness and Flaw Inspection Solutions

38DL PLUS

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Home/ Products/ Thickness and Flaw Inspection Solutions/ Thickness Gauges/ 38DL PLUS
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  • Overview
  • Specifications
  • Software Features
  • 38-Link™ Wireless Adaptor
  • Transducers
  • Applications
  • Resources

Overview

360 View 38DL PLUS® Ultrasonic Thickness Gauge:
Advanced Features, Simple Operation, Rugged, Reliable

The 38DL PLUS is an innovative instrument that signals a new era in ultrasonic thickness gauging. Ideally suited for almost every ultrasonic thickness application, this handheld thickness gauge is fully compatible with a full line of dual and single element transducers. The versatile 38DL PLUS can be used in applications ranging from wall thinning measurements of internally corroded pipes with dual element probes to very precise thickness measurements of thin or multilayer materials with single element transducers.

The 38DL PLUS comes standard with many powerful but easy-to-use measurement features and a host of application-specific software options. Its sealed case is designed to meet IP67 requirements to withstand the rigors of very wet or dusty environments. The color transflective VGA display provides superior readability from bright sunlight to complete darkness. It features a simple, ergonomic keypad that can be operated with the left or right hand for easy access to all functions.


Key Features

  • Dual and single element transducer compatibility
  • Wide thickness range: 0.08 mm (0.003 in.) to 635 mm (25 in.) depending on material and transducer selection
  • Corrosion thickness gaging with dual element transducers
  • THRU-COAT® and Echo-to-Echo measurements on painted and coated surfaces
  • Internal Oxide/Scale software option
  • Standard resolution of 0.01 mm or 0.001 in. for all transducers
  • High Resolution software option of 0.001 mm or 0.0001 in. with single element transducers 2.25 MHz to 30 MHz
  • Multilayer software option for measurements of up to four layers simultaneously
  • High Penetration software option for attenuating materials such as fiberglass, rubber and thick casting
  • Thickness, Velocity, and time-of-flight measurements
  • Differential mode and Reduction Rate mode
  • Time-based B-scan mode; 10,000 reviewable readings per scan
  • Olympus High Dynamic Gain technology with digital filters
  • V-Path Builder for custom V-path compensation
  • Designed for EN15317

What Makes This Thickness Gauge Different From Others?

The 38DL PLUS is designed to meet the challenges of demanding applications and built to withstand tough conditions in the field and on the production floor. Whether you work in very wet or dusty conditions, cold or hot climates, or bright or dark areas, the 38DL PLUS can handle any inspection job. Need an instrument tough enough to tolerate shocks, drops, and rough handling? The 38DL PLUS with its protective rubber boot and designed for IP67 rating is your answer.


Built for Tough Environments

  • Compact, weighs only 0.814 kg (1.80 lb)
  • Rugged, designed for IP67
  • Explosive Atmosphere: Safe operation as defined by Class I, Division 2, Group D, as found in the National Fire Protection Association Code (NFPA 70), Article 500, and tested using MIL-STD-810F, Method 511.4, Procedure I.
  • Shock tested using MIL-STD-810F, Method 516.5, Procedure I, 6 cycles each axis, 15 g, 11 msec Half sine.
  • Vibration tested using MIL-STD-810F, Method 514.5, Procedure I, Annex C, Figure 6, general exposure: 1 hour each axis.
  • Wide operating temperature range
  • Protective rubber boot with gauge stand
  • Color transflective VGA display with indoor and outdoor color settings for superior clarity
38DL PLUS Thickness Gage

Designed for Easy Operation

  • Simple keypad for right hand/left hand operation
  • Easy operator interface with direct access to all functions
  • Internal and External MicroSD memory card storage
  • USB and RS-232 communication ports
  • Alphanumeric data logger with 475,000 thickness readings or 20,000 waveforms
  • VGA output to connect to computer or monitor
  • Default/Custom dual element transducer setups
  • Default/Custom single element transducer setups
  • Password protected function allows locking of instrument features

Outdoor display setting, A-scan mode


Indoor display setting, B-scan mode

38-Link™ Wireless Communication Adaptor

The optional 38-Link wireless adaptor enables any existing 38DL PLUS thickness gauge to send and receive data using Bluetooth® or wireless LAN*.

The 38-Link adaptor provides three powerful wireless communication capabilities:

  • Wireless communication to the Olympus Scientific Cloud™ (OSC) and the Inspection Project Manager (IPM) app, which allows you to more effectively manage your inspections and much more
  • Bluetooth communication to the Olympus Link mobile app or other compatible third-party applications
  • Bluetooth communication to the optional Link-Wedge software to directly send thickness readings into an active Windows® program on your Windows 10 PC

For more details, see the 38-Link page, or download the 38-Link brochure.

*Wireless LAN and Bluetooth dongle availability depends on your region. Contact your local Olympus sales representative for more information.


Data Logger and PC Interface

The 38DL PLUS has a full-featured internal bidirectional alphanumeric data logger that is designed to easily collect and transfer thickness readings and waveform data.

  • Internal memory of 475,000 thickness readings or 20,000 waveforms with thickness readings
  • 32 Character File name
  • 20 Character ID# (TML#)
  • 9 file formats: Incremental, Sequential, Sequential with custom point, 2-D Grid, 2-D Grid with custom point, 3-D Grid, 3-D custom, Boiler, and Manual
  • The ability to store up to 4 comments (notes) per ID# (TML)
  • Stores comments (notes) at an ID# or to a Range of ID#'s
  • Internal and External MicroSD memory cards
  • File copy with the ability to copy files between Internal/External MicroSD memory cards
  • Standard USB and RS-232 communication
  • Two-way transfer of both single and dual element transducer setups
  • Onboard statistical report
  • Onboard DB Grid View with three programmable colors
  • GageView™ interface program can communicate with the 38DL PLUS using the USB, RS-232 ports, and can read and write to a MicroSD memory card.
  • Direct export of internal files to MicroSD memory card in Excel compatible CSV (comma-separated values) format
38DL PLUS Ultrasonic Thickness Gage side view

GageView™

  • The GageView interface program, a Windows-based application, collects, creates, prints, and manages data from the 38DL PLUS.
  • Creates datasets and surveys
  • Stored data editing
  • View dataset and survey files; including thickness readings, gauge setup values, and transducer setup values
  • Download and upload thickness surveys to and from the gauges
  • Export surveys to spreadsheets and other programs
  • Collecting snapshot screens
  • Printing reports such as Thickness, Setup Table, Statistics, and Color Grid
  • Upgrading operating software
  • Download and upload single and dual element transducer setup files
  • B-scan review

Onboard DB Grid View with three programmable colors

Standard Package

38DL PLUS digital ultrasonic thickness gauge, AC or battery, 50 Hz to 60 Hz
Kits available with standard dual element transducers

  • Charger/AC adapter (100 VAC, 115 VAC, 230 VAC)
  • Internal data logger
  • GageView interface program
  • Test block and couplant
  • USB cable
  • Rubber protective boot with gauge stand and neck strap
  • User's manual
  • Two-year limited warranty

Measurement features: THRU-COAT, Thru-Paint Echo-to-Echo, EMAT compatibility, Min./Max. mode, two alarm modes, differential mode, B-scan, Application Auto-Recall, temperature compensation, Average/Min. mode

Specifications

Measurements > Dual element transducer measurement mode Time interval from a precision delay after the excitation pulse to the first echo
Measurements > THRU-COAT® measurement Measurement of true metal and coating thicknesses with a single back-wall echo (with D7906-SM and D7908 transducers)
Measurements > Thru-Paint Echo-to-Echo Time interval between two successive back-wall echoes to eliminate paint or coating thickness
Measurements > Single element transducer measurement modes Mode 1: Time interval between the excitation pulse and the first back-wall echo
Mode 2: Time interval between the delay line echo and the first back-wall echo (with delay or immersion transducers)
Mode 3: Time interval between successive back-wall echoes following the first interface echo after the excitation pulse (with delay line or immersion transducers)
Oxide: optional
Multilayer mode: optional
Measurements > Thickness range 0.080 mm to 635.00 mm (0.003 in. to 25.000 in.) depending on material, transducer surface conditions, temperature, and selected configuration
Measurements > Material velocity range 0.508 mm/μs to 13.998 mm/μs (0.020 in./μs to 0.551 in./μs)
Measurements > Resolution (selectable) Low: 0.1 mm (0.01 in.)
Standard: 0.01 mm (0.001 in.)
High Resolution (optional): 0.001 mm (0.0001 in.)
Measurements > Transducer frequency range Standard: 2.0 MHz to 30 MHz (-3 dB)
High Penetration (optional): 0.50 MHz to 30 MHz (-3 dB)
General > Operating temperature range -10 °C to 50 °C (14 °F to 122 °F)
General > Keypad Sealed, color-coded keypad with tactile and audible feedback
General > Case Impact-resistant and water-resistant, gasketed case with sealed connectors. Designed for IP67.
General > Dimensions (W x H x D) Overall: 125 mm x 211 mm x 46 mm (4.92 in. x 8.31 in. x 1.82 in.)
General > Weight 0.814 kg (1.80 lb)
General > Power supply AC/DC adaptor, 24 V; lithium-ion battery 23.760 Wh; or 4 AA auxiliary batteries
General > Battery life, lithium-ion Operating time: minimum 12.6 h, 14 h typical, 14.7 h maximum Fast charge: 2 h to 3 h
General > Standards Designed for EN15317
Display > Color transflective VGA display Liquid crystal display, display area 56.16 mm x 74.88 mm (2.2 in. x 2.95 in.)
Display > Rectification Full wave, RF, half-wave positive, or half-wave negative
Inputs/Outputs > USB 1.0 client
Inputs/Outputs > RS-232 Yes
Inputs/Outputs > Memory card Maximum capacity: 2 GB External microSD memory card
Inputs/Outputs > Video output VGA output standard
Internal Data logger > Data logger The 38DL PLUS identifies, stores, recalls, clears, and transmits thickness readings, waveform images, and gauge configuration information through the standard RS-232 serial port or USB port.
Internal Data logger > Capacity 475,000 thickness measurements or 20,000 waveforms with thickness measurements
Internal Data logger > File names, IDs, and comments 32-character file names and 20-character alphanumeric location codes with four comments per location
Internal Data logger > File structures Nine standard or custom application-specific file structures
Internal Data logger > Reports On-gauge reporting of summary with statistics, Min./Max. with locations, Min. review, file comparison, and alarm report

Software Options

38DLP-OXIDE (U8147014): Code-activated Internal Oxide measurement software
38DLP-HR (U8147015): Code-activated High Resolution measurement software
38DLP-MM (U8147016): Code-activated Multilayer measurement software
38DLP-HP (U8147017): Code-activated High Penetration (low frequency) measurement software
38DLP-EBSCAN (U8147018): Encoded B-scan software

Optional Accessories

38DLP/EW (U8778348): Three-year warranty
1/2XA/E110 (U8767104): Filter adaptor for E110-SB EMAT transducer
38-9F6 (U8840167): RS-232 cable
38-C-USB-IP67 (U8800998): USB cable for IP67 sealed operation
38DLP/RFS (U8780288):Foot switch, factory installed
HPV/C (U8780124): Digital caliper for thickness input for velocity measurements
38DLP-V-CC (U8840172): Cable for digital caliper
EPLTC-C-VGA-6 (U8840035):VGA output cable
MICROSD-ADP-2GB (U8779307): 2 GB External microSD memory card
BSCAN-ENC (U8779522): Encoded B-scan buggy
38DL--ENC-CBC-10 (U8840168): 10 ft encoder cable

Software Features

Thickness Measurements on Internally Corroded Metals38DLP corrosion pipe probe

One of the major applications of the 38DL PLUS is measuring the remaining thickness of pipes, tubes, tanks, pressure vessels, hulls, and other structures affected by corrosion or erosion. Dual element transducers are most commonly used for these applications.

  • Automatic Probe Recognition for standard D79X series dual element transducers
  • Ten custom dual element transducer setups
  • Optimized default gain during calibration for dual element transducer
  • V-Path Builder for custom V-path compensation
  • Calibration Doubling warning when echo doubling may occur during calibration
  • THRU-COAT® and Echo-to-Echo measurements on painted and coated surfaces
  • High temperature measurements; up to 500 °C (932 °F)
  • Boiler tube and Internal Oxide measurements (optional) with M2017 or M2091 single element transducers
  • EMAT transducer (E110-SB) for no-couplant measurements of boiler tubes with external oxide/scale buildup

encoded scanner b-scan screen

Optional Encoded B-Scan

This powerful optional feature allows the 38DL PLUS to be connected to a linear encoded scanner to generate encoded B-scans. The 38DL PLUS will capture and store the distance traveled information along with corresponding thickness readings. The waveform at the minimum thickness is also captured. The user can select the distance between measurements and select between bidirectional and unidirectional modes. Up to 10,000 thickness readings can be stored in a single B-scan.


thrucoat probe screen

Thru-Coat® Technology

A single back-wall echo is used to measure true metal thickness. You can display the metal and coating thicknesses, each adjusted for their correct material sound velocities. There is no need to remove paint and coatings from surfaces. THRU-COAT measurements use the D7906-SM, D7906-RM, and D7908 dual element transducers.


Temperature Compensation

Variations in material temperature affect sound velocity and accuracy of thickness measurements. The temperature compensation feature allows you to manually enter the calibration block's temperature and the current (high) temperature at the measurement points. The 38DL PLUS automatically displays the temperature-corrected thickness.


Optional Oxide/Scale Measurement

38DL PLUS uses advanced algorithms to measure the thickness of oxide/scale buildups inside boiler tubes. The gauge simultaneously displays the metal thickness of the boiler tube and the thickness of the oxide layer. Knowing the thickness of the oxide/scale helps predict tube life. We recommend using M2017 or M2091 transducers in this application.


V-Path Builder

This new and patented feature allows you to build a custom V-Path compensation curve for almost any dual element transducer. These curves can be saved and recalled along with custom setups for most dual element transducers.

You simply calibrate and enter the known thickness with a minimum of 3 and up to 10 calibration points, and the instrument will create the V-path.


Automatic Probe Recognition

All standard dual element transducers feature Automatic Probe Recognition, which automatically recalls a default V-path correction for each specific transducer.


Thickness Measurements on Plastics, Metals, Composites, Glass, Rubber, Ceramics

When using single element transducers, you can make accurate thickness measurements on metals, plastics, composites, glass, ceramics, and other materials. These transducers are available in a wide range of frequencies, diameters, and connector styles. The High Resolution software option allows you to make very precise measurements at a resolution of 0.0001 in. or 0.001 mm.


 
  • Standard resolution of 0.01 mm (0.001 in.) for all transducers
  • High Resolution software option can display measurements up to 0.001 mm (0.0001 in.) for single element transducers from 2.25 MHz to 30 MHz
  • High Penetration software option for measurements on attenuating materials such as fiberglass, rubber, and thick castings
  • Multilayer software option for individual thickness measurements of up to four layers simultaneously
  • Thickness, Velocity, or time-of-flight measurements
  • Application Auto-Recall with default and custom setups to simplify thickness measurements


High Penetration Software Option

This option allows you to use low frequency single element transducers (as low as 0.5 MHz) to measure thick or sound attenuating materials such as rubber, fiberglass, castings, and composites.
 


Multilayer Software Option

This software option calculates and simultaneously displays thickness measurements of up to four individual layers.

It also displays total thickness of selected layers. Typical applications include thickness of barrier layers in plastic fuel tanks, bottle preforms, and soft contact lenses.

38-Link™ Wireless Adaptor

Simplified Data Transfer and Management

Ultrasonic thickness gauge inspections can be time consuming—thousands of individual measurements recorded in the field and painstakingly compiled into data management software. And if these readings are recorded by hand, inaccuracies can lead to longer equipment shutdowns and added time and costs for owner-operators.

The 38-Link adaptor enables any 38DL PLUS® thickness gage to send and receive data using a Bluetooth® or wireless LAN connection*, simplifying data management and enabling a more efficient workflow. Upgrading is simple—the 38-Link adaptor easily attaches to the gauge’s rubber boot.

*Wireless LAN and Bluetooth dongle availability depends on your region. Contact your local Olympus sales representative for more information.

3 Connection Options

Powerful Fleet Management Tools

encoded scanner b-scan screen

Wirelessly connect to the Olympus Scientific Cloud™ (OSC) and subscribe to the Inspection Project Manager (IPM) app to benefit from:

  • Improved data integrity
  • Fast, reliable data transfers from the inspection site
  • Faster reporting and decision making
  • Improved visibility to project status
  • Remote management and monitoring of projects, jobs, and tasks
  • Improved human and device resource utilization

Send Thickness Data to Your Mobile Phone or Tablet

Use the Olympus Link mobile app and Bluetooth® to send thickness data to your phone or tablet. From your mobile device, share thickness data over text message or email, or save the data as a text file for easy import to a spreadsheet. You can also send data to compatible third-party mobile applications.

Easily Populate Your Thickness Data into Data Entry Programs

Use the optional Link-Wedge software and Bluetooth to send data from your gage to an active Windows® software application. The software can populate data into almost any Windows-based data entry program. The Link-Wedge is only compatible with Windows 10.

Transducers

Transducers for Precision Thickness Gauges

Transducers for Corrosion Thickness Gauges

  • Contact Transducers
  • Delay Line
  • Immersion Transducers
  • Test Blocks & Cables
  • Transducer Wizard
  • Gauge Dual Transducers
  • Cables

Olympus offers a complete selection of transducers, cables, couplants, calibration test blocks, and accessories to meet a wide variety of ultrasonic precision thickness gaging applications.

Applications

38DL PLUS for Precision Thickness

38DL PLUS for Corrosion Inspection

Resources

Application Notes

High-Temperature Ultrasonic Testing
Ultrasonic Testing FAQs
Normal Incidence Shear Wave Transducers
Ultrasonic Detection of Manufacturing Artifacts in New Pipe
Wall Thickness of Plastic Pipe
Thickness of Small Diameter Tubing
Measurement of the Layers in Clad Metal Cookware
Effects of Long Cables in Ultrasonic Testing with Single Element Transducers
Elastic Modulus Measurement
Wall Thickness Gaging in the Blow Molding Industry
Ultrasonic Testing in the Foundry Industry
Iron, Steel, Aluminum, and Non-Ferrous Castings
Wall Thickness Measurement of Cast Engine Blocks and Cylinder Bores
Measuring Thickness of Wax Molds for Precision Castings
Measuring Nodularity in Cast Iron
Thickness Measurements of Fiberglass Plates, Pipes and Storage Tanks
Thickness Measurement of Aerospace Composites
Thickness Gaging of Fiberglass Boat Hulls
Measurement of Fiberglass Gelcoat
Thickness Measurements on Rubber Hoses & Tubing
Thickness Measurements on Rubber Sheets and Coatings
Measuring the Thickness of Rubber Tires
Thickness Testing of Reinforced Rubber Conveyor Belts
Thickness Measurement of Glass
Wall Thickness of Turbine Blades
Thickness Measurements and Flaw Detection of Ceramics
Ultrasonic Measurements of Liquids
Base Curve and Thickness Measurement of Soft Contact Lenses
Measurements of Silicone Coatings on Porcelain High Voltage Insulators
High Temperature Ultrasonic Testing
Thickness Measurement of Multilayer Plastic Food and Beverage Containers
Thickness Measurement of Coextruded Cap Layers
Thickness Measurement of Automobile Fuel Tanks
Thickness Measurements of Polymer Aircraft Windshields
Corrosion Thickness Gauging with Dual Element Transducers
Measuring Internal Oxide Scale in Boiler Tubes
Measuring Metal Thickness Through Paint
Measurement of wall thickness of steam boiler tubes with EMAT transducers
Wall Thickness Measurements of Metal Pipes and Tubes
Ultrasonic Thickness Measurements of Hot Metals
Measuring Wall Thickness of Gun Drilled Metal
Metal Coils Thickness Inspection
Wall Thickness Measurements for Metal Cans, Containers and Enclosures
 Show More

Videos

Registering the 38-Link on the Olympus Scientific Cloud (OSC) Platform
Measure the Thickness of a Multilayer Aircraft Window
Measure the Thickness of a Rubber Conveyor Belt with Steel Cord Reinforcement Using an M1036 Transducer
Using an M1036 Transducer to Measure the Thickness of a Fabric Cord Rubber Conveyor Belt
Measure the Thickness of Gelcoat on Fiberglass Using an M208 Transducer
Measure Thick Fiberglass Composite Using an M1036 Transducer
Measure Thick Fiberglass Composite Using an M2008 Transducer
Measure Small-Diameter Tubing Using an Immersion Transducer
Making Encoded B-scan Measurements
Saving Custom Transducer Setups
Set Up a Sonopen™ Transducer to Measure Small-Diameter Tubing
Olympus Link Mobile App Quick Start Video
Connecting the 38-Link to a Mobile Hotspot using a PC
38-Link Social Media Video
Introduction to the Olympus 38-Link™
Olympus Link-Wedge Quick Start Video
Connecting the 38-Link to WLAN using a PC
Cast Components in the Foundry Industry
27MG Ultrasonic Thickness Gauge Introductory Video
38DL PLUS_Recall Calibrate Store Single Element Transducer setup
38DL PLUS_Echo to Echo vs.Thru-Coat
38DL PLUS_Zero and Calibrate a Thru-Coat Probe
38DL PLUS_Zero & Calibrate a Dual Probe
38DL PLUS Drop Test
38DL PLUS Product Overview
 Show More

Infographics

38DLP-Encoded B-Scan Infographic
38DL PLUS Ultrasonic Thickness Gage with Temperature Compensation Infographic

Webinars

Advantages of Ultrasonic Thickness Gages over Flaw Detectors for Corrosion Thickness Measurements
Advances in Ultrasonic and Phased Array Methods of Corrosion Detection and Assessment

White Papers

Ultrasonic Transducer Technical Notes (PDF Brochure)
Introduction to Thickness Gaging

Tutorials

Ultrasonic Flaw Detection Tutorial
Internal Oxide Scale Theory and Operation
Thickness Gage Tutorial
 Show More

FAQs

Ultrasonic Testing FAQ

Brochures

38DL PLUS Thickness Gage Accessories
38-Link™ Wireless Adaptor for the 38DL PLUS Thickness Gage
38DL PLUS Thickness Gage
 Show More

Manuals

38-Link Wireless Adaptor Getting Started Guide
38DL PLUS Getting Started
38DL PLUS Basic Operation Manual
38DL PLUS User's Manual
 Show More

Solutions

Metal Industry Inspection Solutions
Wind Turbine Inspection Solutions
Corrosion Inspection Solutions
Composite Inspection Solutions
Measurement Solutions
 Show More

Case Studies

The 38DL PLUS™ Ultrasonic Thickness Gauge Is an Asset to Asset Reliability Inspections

Blog

The 38DL PLUS™ Ultrasonic Thickness Gauge Is an Asset to Asset Reliability Inspections
Cutting the Cord: A Simple Solution for Wireless Thickness Gage Data Transfer
For Goodness Sake—Assuring the Quality of Toys with Thickness Gages
3 Ways We Uncomplicate Corrosion Thickness Gaging Inspection Data Management
2 Challenges of High-Temperature Thickness Gaging and How to Solve Them
How the Echo-to-Echo and THRU-COAT® Techniques Measure Up for Corrosion Inspection
8 Tips to Improve Your High-Temperature Corrosion Thickness Measurements
You Asked and We Listened: New GageView Instructional Videos
A Look at Contact Lens Thickness: How Olympus Helps Manufacturers Keep Lenses in Shape
 Show More
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