38DL-PLUS

Thickness Measurements on Internally Corroded Metals

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

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.

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.