Dakota PR9 Racing Engine Thickness Gauge

Dakota PR9 Racing Engine Thickness Gauge

Highly accurate thickness gauge specially designed for racing engines

Specially designed for the racing industry

The Dakota PR-9 Racing Engine Thickness Gauge is specially designed for the racing industry, and commonly used to measure the thickness of cylinder walls, head ports, decks, chassis tubing, body panels, and windshields.

An additional benefit is the dual element style of probe with the ability to locate blind surface corrosion or deterioration on the blind surface in the water jacket area prior to boring a cylinder or port. The PR-9 has three material calibration options (single point, two point, and target velocity) for increased accuracy, and cylinder wall mapping software is available for manually creating reports.


How It Works:

Simply drag the probe from the bottom of the cylinder, at a given clock position in the cylinder, up to the deck area to locate the minimum thickness found. Scan can then be switched off and the user can find the exact location of the minimum thickness. The high speed scan feature takes 100 measurements per second to save time when scanning a complete cylinder.

Applications include:

  • Cylinders
  • Chassis
  • Head Ports
  • Body Panels
  • Roll Cages
  • Windshields


Styles (Dual Element) - Dimensional Perspective

*Note: Custom sizes available upon request

3/16" Standard Version - Chassis Tubing / Sanctioning
3/16" Low Profile Version
1/4" Standard Version


1/4" Low Profile Version - Head Ports 1" Wand
1/4" Low Profile Version - Head Ports 9" Wand
1/2" Cylinder Walls Version - Block

Protective Case Options

PN: UT-DU-F-302-0001

PN: UT-DU-A-302-6002

Note: The PR-9 replaces the previous PR-8 Series Racing Gauges.

To learn more about the PR-82 Automotive Thickness Gauge, click here:

Learn More About the PR-82

Technical Specifications

PR9 Specifications

PR9 Specifications
Weight 11 ounces (w/ batteries)
Dimensions 2.5"W x 1.24"L x 5.17"H (2.5 x 31.5 x 131.3 mm)
Operating Temperature -22 to 167F (-30 to 75C)
Case Extruded aluminum body with nickel-plated aluminum end caps (gasket sealed)
Sealed membrane that is resistant to both water and petroleum products
Nine tactile-feedback keys
Dual element (transmit and receive)
1 to 10 MHz frequency range
Locking quick disconnect Lemo connectors
4 foot cable
Custom transducers available for special applications
Power Source
Two 1.5V alkaline, 1.2V NiCad, or 1.5V Lithium AA cells
Typically operates for 45 hours on alkaline and 23 hours on NiCad
Low battery indicator on display, auto shut-off after 5 minutes of inactivity
Multi-function 7 segment 4.5 digit liquid crystal display with 0.500 in digit height. Two 0.125 in14 segment fields for labels and values, and one 7 segment field for labels and values. Additional icons to indicate features and modes
Backlight is selectable on/off/auto, and selectable brightness (Lo, Med, Hi) options
Bar graph indicates repeatability of measurement
Factory calibration traceable to NIST & MIL-STD-45662A
5 year limited
Range Measures from 0.025 to 36.00 inches (0.63 to 914.4 millimeters). Range dependent on material and transducer type
Automotive Applications 0.050 to 1.500 inches in casted materials
Units English and Metric
Resolution 0.001 inches (0.01 millimeters)
Velocity Range: 0.0120 to 7300 in/μs (305 to 18,542 m/sec)
PRF 200Hz
Display Update Rate 10Hz
High Speed Scan Display the lowest measurement found during a scan. Scan speed at 100Hz
Calibration One or Two point calibration option

Includes 5 Year Limited Warranty

Description Part # Saved Price Select Option Add to
Dakota Ultrasonics PR-9 Kit Includes: Unit, Standard Transducer, Couplant, Manual, Plastic Carrying Case and AA Batteries. Software available to download. UT-DU-Z-309-0001 $1,325.00
Dakota Ultrasonics Nylon Carrying Bag with Neck Strap for ZX and PZX Series UT-DU-F-302-0001 $60.00
Dakota Ultrasonics Injection molded rubber protective instrument case with neck & hand straps and a kickstand for ZX and PZX Series UT-DU-A-302-6002 $90.00