38DL PLUS™ Ultrasonic Thickness Gage for Tough Environments

Olympus’ 38DL PLUS ultrasonic thickness gage is an advanced handheld instrument fully compatible with a complete line of dual and single element transducers.

The ultrasonic thickness gage can be used in applications from wall thinning measurements of internally corroded pipes using dual element probes to highly accurate thickness measurements of multilayer or thin materials using single element transducers.

The 38DL PLUS thickness gage comes with many robust, user-friendly measurement features, as well as a range of application-specific software options. Its sealed case is built to meet IP67 requirements to endure very dusty or wet environments.

The color transflective VGA display offers excellent readability from bright sunlight to total darkness. It features an easy-to-use, ergonomic keypad that users can operate with their left or right hand for easy access to all functions.

Key Features

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

What Makes This Thickness Gage Different from Others?

The 38DL PLUS ultrasonic thickness gage can overcome the challenges of tough applications and endure harsh conditions on site and on the production floor. Inspectors can use it in wet or dusty environments, hot or cold climates, and bright or dark areas.

Thanks to its protective rubber boot and IP67-rated design, the 38DL PLUS thickness gage is ideal for inspectors who need a sturdy instrument that can withstand drops, shocks, and rough handling.

Built for Tough Environments

  • Wide operating temperature range
  • Compact, weighs just 0.814 kg (1.80 lb)
  • Shock tested using MIL-STD-810F, Method 516.5, Procedure I, 6 cycles each axis, 15 g, 11 msec half sine
  • 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
  • Vibration tested using MIL-STD-810F, Method 514.5, Procedure I, Annex C, Figure 6, standard exposure: 1 hour each axis
  • Color transflective VGA display with outdoor and indoor color settings for excellent clarity
  • Protective rubber boot with gage stand

robust Thickness Gage

Image Credit: Olympus Scientific Solutions Americas NDT

Designed for Easy Operation

  • User-friendly interface with direct access to every function
  • Simple keypad for left or right hand operation
  • VGA output to connect to a computer or monitor
  • Internal and external microSD memory card storage
  • Alphanumeric data logger with 475,000 thickness readings or 20,000 waveforms
  • Password-protected function enables locking of instrument features
  • USB and RS-232 communication ports
  • Default/custom single element transducer arrangements
  • Default/custom dual element transducer arrangements

Outdoor display setting, A-scan mode.

Outdoor display setting, A-scan mode. Image Credit: Olympus Scientific Solutions 

Indoor display setting, B-scan mode.

Indoor display setting, B-scan mode. Image Credit: Olympus Scientific Solutions 

38-Link™ Wireless Communication Adaptor

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

The 38-Link adaptor offers three robust wireless communication capabilities:

  • Bluetooth communication to the Olympus Link mobile app or other compatible third-party applications
  • Wireless communication to the Olympus Scientific Cloud™ (OSC)
  • Bluetooth communication to the optional Link-Wedge software to directly send thickness readings into an active Windows® program on a Windows 10 PC

*Regional availability for the wireless LAN and Bluetooth dongle. Contact an Olympus sales representative for more information.

robust thickness gage

Image Credit: Olympus Scientific Solutions Americas NDT

Data Logger and PC Interface

The 38DL PLUS thickness gage comes with a full-featured internal bidirectional alphanumeric data logger that can easily gather and transmit thickness readings and waveform data.

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

Data Logger and PC Interface

Image Credit: Olympus Scientific Solutions 

GageView Interface Program

  • The GageView interface program is a Windows-based application that can gather, create, print, and manage data from the 38DL PLUS thickness gage
  • Create surveys and datasets
  • View dataset and survey files, such as gage setup values, thickness readings, and transducer setup values
  • Stored data editing
  • Download and upload thickness surveys to and from gages
  • Collect snapshot screens
  • Export surveys to spreadsheets and other programs
  • Print reports, such as Thickness, Statistics, Setup Table, and Color Grid
  • B-scan review
  • Download and upload single and dual element transducer setup files
  • Upgrade operating software

Data Logger and PC Interface

Image Credit: Olympus Scientific Solutions Americas NDT

Standard Package

The standard package includes a 38DL PLUS digital ultrasonic thickness gage with AC or battery, working in the 50 to 60 Hz range.

Kits available with standard dual element transducers.

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

Measurement Features: Thru-Paint Echo-to-Echo, THRU-COAT, two alarm modes, EMAT compatibility, minimum/maximum mode, differential mode, B-scan, temperature compensation, application auto-recall, average/minimum mode.

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