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PR-82 Sonic Thickness Gauge
Click images to enlarge.
Standard Range: 0.040 to 6.00 in / 1.00 to 150.00 mm
Range in Cast Steel & AL: 0.040 to 1.50 in / 1.00 to 38.00 mm

The PR-82 is the first affordable Sonic Tester, utilizing state-of-the-art digital technology to produce fast and accurate readings. It requires no special training to operate.

Unlike calipers, the PR-82 will measure where there is access to only one side. This makes it valuable when measuring roll cage thickness, cylinder walls (before and after boring) and heads during porting.

The PR-82 measures in two modes. The first mode takes a measurement at the point you place the probe. The second is the Scan mode, which is helpful when measuring cylinder walls and roll cages. Place the probe at the bottom of the cylinder and drag it to the top, the gauge will display the thinnest reading measured.

The PR-82 is a lightweight, rugged tool that is resistant to water and oil. Other features include a backlit LCD and a bar graph to indicate signal stability. The 5 year warranty indicates how we feel about the quality of the PR-82. The PR-82 can go where you go, to do the work you do, saving you time and money, making fast, accurate measurements.

PR-82 Sonic Thickness Gauge


  • Four readings per second for single point measurements or 16 per second in SCAN mode.
  • Resolution of 0.001 inch (0.01 mm)
  • Large, back-lit LCD display retains last reading
  • Simple operator controls virtually eliminate training
  • Special-purpose probes are offered for a variety of applications
  • Switch-selected units for inches or mm
  • CE Certified
  • Includes NIST Calibration Certificate

Transducer and Probe Information

For Engine Blocks (Cylinders & Decks)
One probe is usually good for use on both Cast Aluminum and Cast Iron Engine Blocks. The 2 inch radius allows the probe to measure the concave surface inside cylinders. The radius is gentle enough that the same probe can also be used to measure on the flat surfaces "decks" on the block. This one probe will work for over 90% of Cast Aluminum or Cast Iron Blocks.

> 0.500"/5MHz with 2 inch radius
> this is the standard probe supplied with PR-82

*In instances where the above probe does not work, or if the block is made from a very old Aluminum Cast Aluminum, an alternate probe should be specified p/n T-104-4120 (0.500"-10MHz), also supplied with a 2" radius.

For Heads (Ports)
Probe selection depends upon type of material; cast iron or cast aluminum. This probe has a 0.55" radius and is supplied with either a 1 inch wand or 9 inch wand, depending upon user preference.

Cast Iron
> 0.250"/5MHz with 0.55" Radius
with 1 inch wand T-162-2110
with 9 inch wand T-132-2110

Cast Aluminum
> 0.250/10MHz with 0.55" Radius
with 1 inch wand T-162-4110
with 9 inch wand T-132-4110

For Chassis Tubing
This would be used by chassis builders as well as sanctioning bodies (i.e. NHRA, ARCA, etc.). One probe is normally suitable for any application, assuming they do not want "thru-paint" capability.

> 3/16"-10MHz flat bottom (no radius)

Related Products

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- Store up to 64 custom setups. Factory setups available for common applications.
CF12 Sound Safe Ultrasonic Couplant
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Coupling Fluid
- Temp Range: 0 - 200 °F, -18 - 93 °C
TICC-M Protective Holder for Most TI Series Gauges, F-112-0005
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Protective Holder for Ultrasonic Gauges
- Constructed from heavy duty Cordura Nylon
- Built-in belt loop

Complete Kit

The PR-82 is supplied as a complete kit with the gauge, probe, 4 oz. bottle of coupling fluid, 2 AA batteries, NIST Calibration Certificate, and Operating Instruction Manual - all in a foam-fitted carrying case.


RangeStandard Range: 0.040 to 6.00 in / 1.00 to 150.00 mm
Range Cast Steel & AL: 0.040 to 1.50 in / 1.00 to 38.00 mm
Resolution:.001 inches (0.01mm)
Velocity Range:.0492 to .3936 in./ms
1250 to 9999 meters/sec
Units:English & Metric (inch or mm)
Transducer Types:Dual Element (1 to 10 MHz).
Power Source:Two 1.5V alkaline or 1.2V NiCad AA cells.
Battery Life:Typically operates for 200 hours on alkaline and 130 hours on NiCad.
Auto Power off:if idle 5 min
Display:Multi-function 4.5 digit liquid crystal display with 0.500 inch numerals, backlit for use in poor light conditions
Keyboard:Sealed membrane that is resistant to both water and petroleum products.
Case:Extruded aluminum body with nickel-plated aluminum end caps (gasket sealed).
Operating Temperature:-20 to 120F (-20 to 50C)
Weigth, net:10 ounces
Dimensions:2.5 W x 4.5 H x 1.24 D inches
Warranty:5 year limited
Certification:CE Approved, Factory calibration traceable to national standards


Buy Now

Item Description Price
PR-82 Ultrasonic Thickness Gauge Replaced by PR-9
3/16" diameter, 5 MHz Low Profile dual element transducer
1/4" diameter, 5.0 MHz, dual element transducer, Side In, Potted
1/4" diameter, 5 MHz dual element transducer with .6" Radius and 1" wand
1/4" diameter, 5 MHz dual element transducer with .6" Radius and 9" wand
1/2" diameter, 5 MHz dual element transducer with 2" Radius
3/16" diameter, 10 MHz, dual element transducer, Side in, Potted
1/4" diameter, 10 MHz Low Profile Dual Element Transducer with .6" Radius and 1" wand
1/4" diameter, 10 MHz Low Profile Dual Element Transducer with .6" Radius and 9" wand
1/2" diameter, 10 MHz Dual Element Transducer with 2" Radius
SoundSafe Coupling Fluid - 12 oz / 354 ml - NSN: 6635-01-553-0559
Protective Holder for Most TI Series Gauges, F-112-0005
In stock
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Lead Time Varies, Please contact us for availability.