NDT 815 MVX Thickness Gauge

Specifications NDT 815 Thickness Gauge


  • Weight: 13.5 ounces (with batteries).
  • Size: 2.5 W x 6.5 H x 1.24 D inches (63.5 W x 165 H x 31.5 D mm).
  • Operating Temperature: -14° to 140°F (-10° to 60°C).
  • Keyboard: Membrane switch with twelve tactile keys.
  • Case: Extruded aluminum body with nickel-plated aluminum end caps (gasket sealed).
  • Data Output: Bi-directional RS232 serial port. Windows® PC interface software.
  • Display: 1/8 in. VGA grayscale display (240 x 160 pixels). Viewable area 2.4 x 1.8 in. (62 x 45.7mm).
  • EL backlit (on/off/auto).


  • Measurement Modes: Pulse-Echo (flaws, pits) and Echo-Echo (thru-paint)
  • Pulser: Square wave pulser with adjustable pulse width (spike, thin, wide).
  • Receiver: Manual or AGC gain control with 40dB range, depending on mode selected.
  • Timing: 20 MHz with ultra low power 8 bit digitizer.

Power Source

  • Three 1.5V alkaline or 1.2V NiCad AA cells. Typically operates for 150 hours on alkaline and 100 hours on NiCad (charger not included.)
  • Auto power off if idle 5 min. Battery status icon.


  • Range in Pulse-Echo Mode: (Pit&Flaw Detection) measures from 0.025 to 9.999 inches
  • (0.63 to 254 millimeters).
  • Range in Echo-Echo Mode: (Thru Paint & Coatings) measures from 0.10 to 4.00 inches
  • (2.54 to 102 millimeters).
  • Range will vary +/- depending on the thickness of coating.
  • Resolution: +/- .001 inches (0.01 mm)
  • Velocity Range: .0492 to .3936 in./ms 1250 to 9999 meters/sec
  • Calibration: Single and Two point calibration option, or selection of basic material types.
  • Units: English & Metric


  • A-Scan Rectified +/- (flaw view) RF (full waveform view)
  • B-Scan Cross sectional view. Display speed of 15 secs per screen.
  • Large Digits Standard thickness view. Digit Height: 0.400 in (10mm).
  • Scan Bar 6 readings per second. Viewable in B-Scan and Large Digit views.
  • Repeatability Bar Graph Bar graph indicates stability of reading

Data Logger

  • 12,000 pages of memory (alpha numeric storage).
  • Page contents: 1 reading and 1 waveform per page.
  • OBSTRUCT to indicate inaccessible locations.
  • Memory: 16 megabit non-volatile ram.


  • Transducer Types: Dual Element (1 to 10 MHz).
  • Locking quick disconnect “ 00” LEMO connectors. Standard 4 foot cable.
  • Custom transducers and cable lengths available for special applications.

Additional Information

  • The NDT 815 MVX Thickness Gauge is equipped with multiple viewing options to provide users with a complete set of inspection tools: (RF waveform, +/- Rectified waveform, Time based B-Scan, and Large Digits).
  • The adjustable square wave pulser provides the flexibility necessary for both high resolution and penetration requirements.
  • The A-Scan rectified mode is commonly used for detecting flaws/pits in pulse-echo mode and measuring thru-paint and coatings in echo-echo mode.
  • The time-based B-Scan feature of the NDT 815 displays a cross section of the test material. It is commonly used to display the profile of the bottom surface of the test material.
  • Built-in AGC gain control for thru-paint measurements in multi-mode operation.
  • Prove up flaw detection capability when using the optional single to dual transducer adapter cable along with an angle beam transdcuer and wedge assembly.
  • The variety of calibration options is just one more example of NDT 815’s overall versatility.
  • The NDT 815 has the ability to store up to 64 custom user-defined setups. All factory setups can be selected, edited and saved to any setup location.
  • The NDT 815 is equipped with an alpha-numeric data logger to provide increased versatility for those custom reporting needs.
  • The built-in transducer types offer increased linearity between transducers.
  • The high speed scan feature speeds up the inspection process by making 32 measurements per second. Remove transducer from the test material and display the minimum measurement scanned.
  • Use the visual alarm to set hi and lo limits for applications requiring specific tolerances. If the actual thickness value is above or below the limits, a red light is illuminated.
  • Use the find feature to locate the detection point, while automatically adjusting the display to bring the signal into view.
  • Complete with Windows® based software and interface cable for transferring data to & from a PC.
  • 2 year limited warranty

Standard Kit Contents the NDT 815 instrument, 1/4″ diameter x 5.0 MHz dual element transducer on 4 foot long cable, (3) size AA Alkaline Batteries, 4 oz. plastic bottle of Ultrasonic Couplant, Operation Manual, Serial Interface Cable, Data Management Software, Hard-shell Carrying Case and Certificate of Calibration.

Click for NDT-815 Overview .pdf flyer
Click for NDT-815 Manual .pdf version


Made in the USA