Overview

39DL PLUS™ Ultrasonic Thickness Gauge

Faster Thickness Results

Streamline your ultrasonic thickness inspection process with one fast, connected, and reliable handheld gauge. The 39DL PLUS™ gauge works as a precision or corrosion thickness gauge for demanding applications.

With world-class ultrasonic capability, fast scanning speeds up to a 60 Hz update rate, and fully integrated wireless connectivity, our flagship handheld thickness gauge delivers results you can trust in a seamless workflow.

Connected: Integrated Wi-Fi®, Bluetooth®, USB, RS-232, and a removable microSD card*
Fast: Scan for minimal thickness areas at a 2 times faster display update rate**
Versatile: Tackle multiple thickness applications with our full line of dual and single element transducers

*Wi-Fi^® and Bluetooth^® are pending certification in some regions. Contact your local Evident representative for details on their availability.
**Up to 60 Hz versus 30 Hz on the predecessor model and comparable handheld thickness gauges.

Affordable Part Scanning

With breakthrough scanning speeds, the 39DL PLUS instrument offers an industry-leading* 60 Hz update rate for handheld thickness gauges.

Works as an affordable alternative for inspection codes that require a 60 Hz display update rate for scanning; get the scanning speed of a flaw detector with the ease of use of a thickness gauge
Find thin spots more easily when scanning for minimal thickness areas on pipes and other assets affected by corrosion

*As of June 2024.

One Thickness Gauge for Multiple Applications

Take advantage of powerful measurement features and a suite of application-specific software options for your current and future requirements.

Wide thickness range: 0.08 mm (0.003 in.) to 635 mm (25 in.) depending on material and transducer selection
Corrosion thickness gauging with dual element transducers
High Resolution software option of 0.001 mm or 0.0001 in. with single element transducers from 2.25 MHz to 30 MHz
THRU-COAT™ technology and echo-to-echo measurements to measure through painted and coated surfaces
Internal Oxide/Scale software option for boiler tube and internal oxide measurements
Multilayer software option to measure up to four layers simultaneously
High Penetration software option for attenuating materials such as fiberglass, rubber, and thick castings

Standard resolution: 0.01 mm or 0.001 in. for all transducers
Thickness, velocity, and time-of-flight measurements
Differential mode and reduction rate mode to track thickness variation and its percentage from a preset value
Time-based B-scan mode: 10,000 reviewable readings per scan
High Dynamic Gain technology with digital filters optimizes the starting gain setting based on calibration
V-Path Builder for custom V-path compensation in corrosion applications
Designed for EN15317 compliance
Compatible with all probes and accessories supported on the predecessor model

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	0.08 mm to 635 mm (0.003 in. to 25 in.) depending on material, transducer surface conditions, temperature, and selected configuration
Measurements	Material velocity range	0.508 mm/μs to 13.998 mm/μs (0.02 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 × 211 mm × 46 mm (4.92 in. × 8.31 in. × 1.82 in.)
General	Weight	0.83 kg (1.83 lb)
General	Power supply	AC/DC adapter, 24 V; lithium-ion battery 23.760 Wh; or 4 AA auxiliary batteries
General	Battery life, lithium-ion	Operating time: typically 8 hours Fast charge: 2 to 3 hours
General	Standards	Designed for EN15317
General	Explosive Atmosphere	Testing using MIL-STD-810H, Section 511.7, Procedure I
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	USB 3.0
Inputs/Outputs	RS-232	Yes
Inputs/Outputs	Memory card	Maximum capacity: 32 GB external microSD memory card
Inputs/Outputs	Video output	VGA output standard
Wireless Communication	Wi-Fi®	Integrated
Wireless Communication	Bluetooth®	Integrated
Internal Data logger	Data logger	The 39DL 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	792,832 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

Home/ Products/ Thickness Gauges/ 39DL PLUS

Thickness and Flaw Inspection Solutions 39DL PLUS

Redirecting

Thickness and Flaw Inspection Solutions
39DL PLUS