How to Measure Surface Profile with RTR 3:49
In this video, learn how to measure surface profile using Testex Replica Tape and the PosiTector RTR H Replica Tape Reader.
The PosiTector RTR 3D uses Testex® Press-O-Film™ replica tape to capture the surface contour of blasted, textured or irregular substrates.
By burnishing replica tape, inserting it into the reader, and using light-intensity vs thickness analysis, it produces both 2D traces and full 3D surface images in seconds. Ideal for QA, compliance checking or monitoring coating readiness.
Supplied in the UK by DFT Instruments, each RTR 3D unit arrives calibrated and ready, with full traceability, rugged build suitable for the field, and UK technical support and accessories included.
Features
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Advanced Replica Tape Measurement – Uses Testex® Press-O-Film™ to capture and record 2D and 3D surface profile data with the accuracy of a digital spring micrometer.
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Simple, Fast Operation – Burnish the tape on the prepared surface, insert it into the gauge, and view full 3D imagery and 2D/3D parameters within seconds.
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Comprehensive Data Output – Automatically reports key roughness metrics including Ra, Rq, Rz, Rp, Rv, Rt, Rpc (2D) and Sa, Sq, Sz, Sp, Sv, Spd (3D) for complete surface analysis.
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Versatile Application – Equally suited to field or laboratory use on flat, curved, or irregular substrates, making it ideal for diverse inspection tasks.
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Certified Accuracy – Supplied with a long-form calibration certificate traceable to an accredited national laboratory for reliable, audit-ready results.
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Flexible Data Management – Export high-resolution .SDF 3D image files for review in PosiSoft software or other compatible third-party analysis tools.
Why Measuring Matters
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Better Quality Control
Peak-to-valley height (HL) is standard, but adding 2D/3D metrics (Ra, Rz, Sq, Sp, Sv etc.) gives a fuller view of surface roughness. That helps predict coating adhesion, corrosion resistance, and performance more reliably. -
Visual and Traceable Evidence
The 3D imaging and .SDF file export mean you can include thumbnail views of surface finish in reports—helpful in audits, customer records or when verifying blasting consistency. -
Adaptable Across Substrates
Works not only on flat steel, but also curved or irregular surfaces—thanks to replica tape. Even complex surfaces (e.g. pipes, textured panels) can be profiled with good accuracy. -
Compliance with Standards
Meets international standards such as ASTM D4417, ISO 8503-5, NACE SP0287, SSPC PA-17 etc., ensuring results are valid for specifications.
Why Choose DFT?
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DeFelsko Expertise Since 1998 – DFT Instruments has been the UK distributor for DeFelsko precision instruments for over 25 years, offering unmatched product knowledge and direct access to the manufacturer.
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UK-Based Calibration & Service – As a DeFelsko Authorised Service Centre, we provide local calibration, maintenance, and repairs, ensuring fast turnaround and traceable results without overseas delays.
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Fully Certified & Traceable – Every RTR 3D is delivered with a long-form Certificate of Calibration traceable to PTB/NIST, so you can meet ISO and client audit requirements with confidence.
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Genuine Equipment & Accessories – We stock authentic DeFelsko probes, replica tapes, burnishing tools, and spare parts, guaranteeing accuracy and long-term reliability.
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Specialist Technical Support – Our UK team offers hands-on advice for correct tape selection, burnishing technique, and 2D/3D data interpretation, helping you get the most from every inspection.
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Built for the Field – Rugged IP65-rated construction, protective case, and easy-use software mean your instrument stays dependable in even the harshest on-site conditions.
Helpful PosiTector RTR 3D Videos
How to Create Inspection Reports 4:05
This video highlights the benefits of the PosiTector SmartLink when paired with a PosiTector SPG or any of the other compatible PosiTector gauges by DeFelsko.
Features & Benefits
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Measures standard (HL) peak-to-valley heights plus full 2D and 3D parameters (Ra, Rz, Sq, Sp, Sv, Spd etc.) for more thorough surface profile analysis.
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Large 2.8″ impact-resistant colour touchscreen with redesigned keypad for fast navigation.
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IP65-rated enclosure: dustproof, water-resistant, built for harsh environment use.
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Storage options: Standard (≈1,000 readings per probe) or Advanced (~250,000 readings across up to 1,000 batches).
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Built-in software features: screen capture, batch naming & notes via on-gauge keyboard, date/time stamps, filters/cut-offs, auto rotate display with flip lock.
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Export capabilities: high-resolution .SDF files and thumbnail 2D/3D images for use with PosiSoft or third-party analysis tools.
Technical Specifications
| Parameter | Detail |
|---|---|
| HL Range (Peak-to-Valley) | 20-115 µm (0.8-4.5 mils) |
| Rt Range | 10-115 µm (0.4-4.5 mils) |
| Minimum Roughness (Ra) | 2 µm (0.08 mils) |
| Accuracy (HL) | ± 5 µm (± 0.2 mils) |
| Accuracy (Rt) | ± (5 µm + 5%) (equivalent in mils) |
| Resolution | 1 µm (0.1 mil) |
| Anvil Diameter & Pressure | Ø 6.35 mm (0.25 in), ~1.1 N (~110 g-force) |
| Field of View | ≈ 3.8 × 3.8 mm |
| Environmental Rating | IP65 (weather-, dust- & water-resistant) |
| Display | 2.8-inch colour touchscreen; auto-rotate & flip lock |
Model Comparison Table:
| Model Code | Body Type | Storage / Connectivity |
|---|---|---|
| RTR 3D1 | Standard Body | ~1,000 readings per probe; USB connectivity |
| RTR 3D3 | Advanced Body | Up to ~250,000 readings in up to 1,000 batches; WiFi, Bluetooth, expanded batch tools etc. |
| Probe Only | Probe-only | For use with existing PosiTector gauge bodies |
PosiTector RTR 3D FAQ’s
Which replica tape grade should be used?
For best 2D/3D parameter accuracy, Optical Grade X-Coarse (XC) tape is recommended. For just HL (peak height) readings, Coarse or XC tape may be used.
Is backing thickness automatically accounted for?
Yes. The incompressible polyester backing (50.8 µm / 2 mils) is automatically subtracted when measuring HL or using Linearize mode.
Can the RTR 3D be used on curved or irregular surfaces?
A: Yes. Replica tape offers flexibility, and the probe is designed to accept and measure burnished tape from curved or irregular surfaces.
Do standard and advanced models differ beyond storage?
A: Yes. Advanced adds features such as live graphing, high-volume memory (250,000 readings), WiFi syncing, Bluetooth LE integration, onscreen thumbnails and enhanced batch tools.
Is calibration needed before use?
No—units arrive factory calibrated. The included Long-Form Certificate documents key parameters. Regular verification using the provided check shim and zero reference is advised, especially when probe or tip changed.
What software works with RTR 3D?
PosiSoft Desktop is included; it can open .SDF files, show 2D/3D plots, apply cut-offs & filters, and manage batches. Third-party software may also import .SDF files.
Still need help?
If you experience an issue, check our troubleshooting guide or contact our support team directly. As a DeFelsko Authorised Service Centre (DASC), DFT Instruments provides calibration, repair, and technical assistance locally in the UK.
Find out more about the PosiTector RTR 3D Replica Tape Reader and all the features that come with it
What’s Included:
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PosiTector RTR 3D gauge body (Standard or Advanced)
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RTR 3D probe (knife/burnished replica tape reader module)
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Burnishing tools: ball + high-accuracy burnishing tool
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Replica tape grades (at least optical grade XC)
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Cleaning cards (several), check shim(s), surface cleaning putty
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Protective rubber holster with belt clip, wrist strap, lens shield
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3 × AAA batteries, USB cable
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Carrying case (nylon / hard shell as per model)
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Long-form Certificate of Calibration traceable to PTB/NIST
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PosiSoft software suite for PC/Mac
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2 year warranty on body and probe
Get state-of-the-art 2D/3D surface profile data in your hands—with visual reports, traceability, and precision. The PosiTector RTR 3D brings target blasting, coating prep, and quality control to a new level.
📞 To enquire about this product, contact our team today on: 01442 879494 or Complete the form.
PosiTector RTR 3D Price:
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