RX8-DL Automotive Sonic tester
Important note: The PR-8V Sonic Tester has been rebranded as RX8-DL. All specifications and functionality remain available under the new model name.
The RX8-DL sonic gauge from Checkline is engineered specifically for engine builders and race shops. It is ideal for applications involving difficult-to-measure materials such as cast steel or aluminium engine blocks and parts, but it can also measure chassis tubing, body panels, roll cage tubing and windscreen thickness. The RX8-DL provides wall thickness measurements with a resolution of 0.01 mm and is compatible with a wide range of ultrasonic transducers for different applications.
Whether you are performing thickness checks on corroded parts or assessing cylinder wall integrity, the versatile RX8-DL delivers the accurate information required for critical inspections.
Key Features:
- Measurement Modes: Includes Pulse-Echo (P-E) and Echo-Echo (E-E) for accurate thickness measurement through coatings.
- Automatic Gain Control: Echo-Echo mode features AGC to measure coated materials such as chassis or roll cage tubing with or without the coating layer.
- Time-Based B-Scan: Provides a cross-sectional view of the back surface, enabling engine builders to visualise cylinder contours during scanning.
- Material Setups: Store up to 64 custom setups, plus factory defaults for common applications.
- Data Output and Storage: Integrated data logger designed for engine and chassis inspection, offering selectable cylinder mapping or alphanumeric file storage.
- High-Speed Scan: Captures up to 200 measurements per second, displaying minimum and maximum values live during scanning.
Key Benefits:
- Versatile Inspections: Accurately measures wall thickness on coated and uncoated surfaces, including cylinder walls and head ports.
- User-Friendly Interface: Clear menus and fast setup make the RX8-DL easy to operate.
- Durable Construction: Rugged aluminium housing built to withstand demanding automotive environments.
- Adjustable Gain: Five-position gain switch with 3 dB increments (40–52 dB) for fine-tuning measurements in noisy or hard-to-penetrate materials.
- Wide Measurement Range: P-E: 0.63 – 914.4 mm; E-E: 2.54 – 101.6 mm (depending on material and transducer).
The RX8-DL combines advanced ultrasonic technology with ergonomic design and inspection flexibility, making it the preferred choice for engine builders and automotive race professionals who demand accuracy, adaptability and ease of use in a single instrument.
Contact us to learn how the RX8-DL can support your inspection and technical assessment needs.
Features
- B-Scan Display: Time-based cross-sectional view with combined B-Scan and digits display
- High-Speed Scan: Adjustable 10–200 readings per second
- Transducer Compatibility: Supports selectable transducer types with built-in dual path error correction for improved linearity
- Gain Control: Manual or automatic gain control
- Memory and Data Logging: Internal storage for setups and inspection data
- Gain Settings: Selectable low, medium and high gain levels for enhanced penetration on difficult materials
- Limit Alarms: Visual and audible alarms with user-defined Hi/Lo limits for tolerance monitoring
- Transducer Support: Uses dual-element transducers; supports single-element depending on application
- Warranty: 2 years
The RX8-DL is supplied as a complete kit including:
- RX8-DL gauge
- T-104-2120 probe
- 120 ml bottle of couplant
- Three AA batteries
- NIST traceable calibration certificate
- User operating manual
- Rugged foam-fitted carrying case
| High Speed Scan Mode | B-Scan Mode |
|---|---|
 |  |
| High-Speed Sampling: Captures 32 readings per second and displays the minimum value detected once the transducer is lifted from the surface. | B-Scan Display: Provides a time-based cross-sectional view of the test material, showing the contour of the blind side or underside of pipes and tanks. The B-Scan trace is drawn from right to left at a rate of seven seconds per screen. |
Accessories
TICC-MVX Instrument Holder for Ultrasonic Gauges
- Material: Heavy-duty Cordura® nylon for superior durability
- Design: Built-in belt loop with adjustable wrist and shoulder straps
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CF-AN Ultrasonic Coupling Fluid
- Purpose: Creates an ultrasonic coupling layer between the transducer and the material being measured
- Temperature Range: -5 °C to +97 °C
- Available Volumes: 125 ml, 250 ml, 500 ml, 1 L, 5 L and 25 L
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LI-ION Rechargeable AA Batteries
- Li-Ion rechargeable battery
- Stable voltage of 1,5 V over 95% of the runtime
- Charged via the USB to USB-C cable
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Specifications
| Range in Steel*: | Pulse-Echo Mode: 0.63 – 254 mm (0.025 – 9.999 in) for uncoated engines and automotive parts, ideal for flaw and pit detection. Echo-Echo Mode: 2.54 – 102 mm (0.1 – 4.0 in) thru-paint and coatings for chassis and body inspections. Range may vary depending on coating thickness. *Measurement range varies by transducer. Using different transducers is recommended to cover the entire range. |
| Resolution: | 0.01 mm |
| Velocity Range: | 1250 – 9999 m/s |
| Units: | Metric (mm) and Imperial (in) |
| Measurement Modes: | - Pulse-Echo (flaws, pits) - Echo-Echo (thru-paint) |
| Transducer Types: | Dual-element, 1 – 10 MHz |
| Memory: | 4 GB internal memory |
| Memory Capacity: | Up to 12,000 pages with one reading and waveform per page |
| Power Source: | Three 1.5 V AA cells (alkaline or rechargeable) |
| Battery Life: | Approx. 150 hours with alkaline, 100 hours with NiCad |
| Auto Power Off: | Powers down automatically after 5 minutes of inactivity |
| Display: | 1/8" VGA greyscale display, 62 × 45.7 mm viewable area |
| Keyboard: | Membrane keypad with 12 tactile keys |
| Case: | Extruded aluminium body with nickel-plated aluminium end caps (gasket sealed) |
| Dimensions: | 63.5 W x 165 H x 31.5 D mm |
| Operating Temperature: | -10 to +60°C |
| Weight: | 400 g |
| Shipping Weight: | 1.5 kg |
| Warranty: | 2 years (gauge), 90 days (probe) |
| Certification: | CE approved; factory calibration traceable to national standards |