Ultrasonic Thickness Gauges

Non-Destructive Ultrasonic Wall & Material Thickness Gauges

ABQ Industrial offers a comprehensive catalog of Ultrasonic Thickness Gauges (UTGs) from industry-leading manufacturers Dakota, Checkline, and ElektroPhysik. Engineered for rapid, non-destructive thickness measurement when access is limited to only one side of a component, our ultrasonic testers accurately measure metals (carbon steel, stainless steel, ductile and cast iron, aluminum, titanium, brass, copper), rigid and thin plastics, glass, ceramics, and composite structures.

To help you select the exact acoustic architecture, transducer frequency, and resolution for your inspection, our catalog is organized into three specialized subcategories: Ultrasonic Corrosion Thickness Gauges, Ultrasonic Precision Thickness Gauges, and Ultrasonic Speciality Thickness Gauges.

Selecting the Right Ultrasonic Thickness Gauge by Application

Choosing between a dual-element corrosion gauge, a single-element precision micrometer, or a specialty sonic tester depends directly on your material's back-wall surface condition, minimum thickness, and geometry:

1. Corrosion, Pitting & Remaining Wall Thickness on Pipes, Tanks & Hulls (0.001" / 0.01 mm Resolution)

When inspecting industrial process piping, boiler tubes, pressure vessels, storage tanks, and marine hulls for internal corrosion pits, erosion, or wall loss, dual-element pitch-catch transducers (1 MHz to 10 MHz) focus sound energy to capture echoes scattered from rough, irregular internal walls:

• Uncoated Metal & Multi-Material Surveys (Pulse-Echo Mode): Use the Dakota Ultrasonics ZX-1, Dakota ZX-3, Dakota ZX-5, or Checkline TI-25MX for ranges from 0.025" to 36.0" (0.63 to 914.4 mm) in steel with 100 Hz high-speed minimum-thickness scanning.


• Painted Structures & Coated Pipelines (Echo-Echo Thru-Paint Mode): Measure true metal thickness right through paint and epoxy coatings up to 0.040"–0.075" thick without scraping paint using the Checkline TI-25MXT, Dakota ZX-6, Dakota ZX-6DL, or ElektroPhysik MiniTest 440.


• Simultaneous Coating + Wall & A-Scan/B-Scan Scope Loggers: Measure coating and metal wall simultaneously with the Checkline TI-CMX and Dakota CMX1-DL, or verify complex echoes with live B-Scan and A-Scan waveforms on the Checkline TI-MMX-SDL, Dakota MX1-DL, Checkline TI-MVX, and Dakota MX2-DL.


• Explore all models in: Ultrasonic Corrosion Thickness Gauges.

2. Thin-Walled Metals, Plastics, Aerospace Skins & Tight Radii (0.0001" / 0.001 mm — 1 µm Resolution)

When inspecting smooth, thin sheet metal (down to 0.006" / 0.15 mm), blow-molded plastic bottles and medical tubing (down to 0.005" / 0.127 mm), aerospace turbine blades, or precision machined parts, single-element delay-line and pencil transducers (5 MHz to 20 MHz) provide 10 times higher resolution than corrosion gauges:

• Digital & Data-Logging Delay-Line Gauges: Choose the Checkline TI-007X, Checkline TI-007DLX, Dakota PZX1 (PZX-7), Dakota PZX1-DL (PZX-7DL), or the Bluetooth color-screen Dakota PCX8-DL.


• A-Scan Scope + 10 MHz Pencil Probe Gauges: Measure inside tight corners, grooves, and complex radii with the Checkline TI-PVX and Dakota PMX2-DL (PVX).


• Explore all models in: Ultrasonic Precision Thickness Gauges.

3. Engine Cylinder Bores, Race Chassis Tubing, Heavy Castings & Pocket Spot Checks

Specialized industrial and motorsport inspection tasks require dedicated probe curvatures, high-penetration pulsers, or pocket-sized portability:

• Engine Block Cylinder Wall & Roll-Cage Sonic Testers: Inspect cast-iron and aluminum cylinder bores for core shift and water-jacket clearance, or certify race car chassis tubing using the Dakota Ultrasonics R9 (PR-9) Sonic Tester and the B-Scan cylinder-mapping Dakota RX8-DL (PR-8V) Sonic Tester.


• High-Penetration Attenuative Castings & Palm-Sized Field Gauges: Penetrate thick fiberglass, rubber, and heavy castings with the 400V tone-burst Dakota PMX4-DL (Z-225-0002), or perform 7 oz pocket-sized spot checks with the Checkline TI-44NA and Checkline TI-45NA.


• Explore all models in: Ultrasonic Speciality Thickness Gauges.

Subcategory Comparison & Selection Matrix

Use the comparison table below to quickly determine which of our three ultrasonic thickness gauge subcategories matches your inspection requirements:

Complete Ecosystem of Ultrasonic Transducers, Calibration Blocks & Couplants

• Replacement & Application-Specific Transducers: Equip your gauge for extreme temperatures (up to 650°F / 343°C), small-diameter boiler tubes (3/16" contact area), coarse-grain castings (500 kHz to 2.25 MHz), or ultra-thin plastics (15 MHz to 20 MHz with graphite tips) in our Thickness Gauge Transducers department.


• NIST-Traceable Calibration Blocks & Ultrasonic Couplants: Verify gauge linearity and velocity calibration with our 4-, 5-, and 8-step Steel, Stainless Steel, and Aluminum Calibration Test Blocks, V-Block probe holders, and high-temp/ambient ultrasonic couplant gels in Wall Thickness Gauge Accessories.