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 is a digital replica-tape reader that burns Testex® Press-O-Film® replica tape onto a prepared surface, then measures the peak-to-valley (HL) surface profile height above the tape’s backing. It offers the ruggedness of a field tool, with enhanced accuracy over traditional spring micrometers.
Whether you work on blasted steel, textured coatings, or curved or irregular surfaces, the RTR ensures your surface profile meets specification—and gives you a digital record for audit, traceability, and quality assurance.
Features
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Digital Replica Tape Measurement – Uses Testex® replica tape to provide precise peak-to-valley surface profile readings with the convenience of a digital spring micrometer.
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Ready to Use – Factory-calibrated and typically requires no further adjustment before taking measurements.
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High-Accuracy Results – Offers greater consistency and precision than traditional mechanical micrometers.
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Built for Harsh Environments – Resistant to solvents, acids, oils, water and dust, and fully weatherproof for on-site work.
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Flexible Interchangeable Platform – Works with the full range of PosiTector probes, so one gauge body supports multiple measurement tasks.
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Advanced Connectivity – Integrated USB, Wi-Fi and Bluetooth for fast data transfer to PosiSoft software on PC, Mac or mobile devices.
Why Measuring Matters
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Correct Adhesion Depends on Profile
Coating adhesion is heavily influenced by the height of the peaks and valleys on your surface. Too shallow, and coatings may not adhere well; too deep, and peaks may be under-coated, leaving corrosion risk. -
Replica Tape is a Proven Method
Replica tape testing is widely accepted in standards (ASTM, ISO, NACE) and allows for physical retention of the tape as proof. It’s particularly valuable when direct measurement by probes is difficult or when surface curvature complicates readings. -
Speeds Up Field Inspections
With automatic compensation for tape backing thickness, selectable tape grade, and handy digital read-out, the RTR cuts down the number of replicas needed and reduces operator error. -
Useful Across Many Industries
For shipyards, bridges, tank linings, architectural metalwork—anywhere you need reliable surface profile results. Also helpful when measuring curved or hard-to-reach surfaces that can’t be addressed by purely mechanical probes.
Why Choose DFT?
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UK Calibration & Full Traceability
Each RTR gauge comes with a long-form Certificate of Calibration traceable to PTB/NIST, ensuring results are valid for contract work and quality audits. -
Fast Local Support
Our authorised service centre in the UK provides repair, calibration, replacement probes or anvils quickly, so downtime is minimised. -
Genuine Equipment & Spare Parts
We stock authentic RTR units, accessories (burnishing tools, check shims, cleaning cards), and spare parts so your measurement tools stay accurate and reliable. -
Guidance You Can Trust
From selecting the correct tape grade to clearing debris, burnishing technique, and reading method—we provide technical support to help you get the best performance from the RTR. -
Durability & Field Readiness
Built for rugged environments: IP65 rating, weatherproof enclosure, large touch screen that works even with gloves, robust carry case and holster included.
Helpful PosiTector SPG 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 replica tape in accordance with ASTM D4417, ISO 8503-5, NACE SP0287, SSPC-PA 17, SSPC SP5, SP6, SP10, SP11-87T and other standards.
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Large 2.8-inch impact-resistant colour touchscreen with redesigned keypad enables quick navigation.
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Weatherproof, dustproof & water-resistant (IP65) for reliable use in harsh environments.
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On-device help menus and Reset feature restore factory settings easily.
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Automatically subtracts the 50.8 µm (2 mil) incompressible backing of replica tape; selects proper conversion factor depending on tape grade (e.g. Coarse, X-Coarse, etc.).
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Switchable units (microns/mils), selectable display languages, auto-rotating display with flip lock.
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Offers standard and advanced model options:
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Standard gives 1,000 readings per probe;
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Advanced adds storage up to ~250,000 readings across many probes and batches, live data visualisation, WiFi, Bluetooth, etc.
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Technical Specifications
| Specification | Detail |
|---|---|
| Peak Height (HL) Range | 20 to 115 µm (0.8 to 4.5 mils) |
| Accuracy (HL) | ± 5 µm (± 0.2 mils) |
| Resolution | 1 µm (0.1 mil) |
| Anvil Diameter | Ø 6.35 mm (0.25 in) |
| Anvil Pressure | ~110 gram-force / 1.1 Newtons |
| Weight | ~140 g (without batteries or probe) |
| Units | Microns and mils, switchable on device |
| Environmental Rating | IP65 enclosure – dust- and water-resistant |
Model Comparison Table:
| Model Code | Gauge Body Type | Best Use Case |
|---|---|---|
| RTR H1 (Standard) | Standard body | Routine surface profile inspections, fixed tape grade work |
| RTR H3 (Advanced) | Advanced body | High volume inspections, multiple probe usage, complex reporting & connectivity |
| Probe-Only Option | RTR-type probe without body | To use with existing PosiTector gauge bodies |
PosiTector SPG FAQ’s
How many replica tape grades work with the RTR?
The RTR is compatible with primary grades such as Coarse and X-Coarse, and also supports Coarse Minus and X-Coarse Plus where required for very shallow or very deep profiles. It selects or prompts for tape grade and automatically adjusts conversion factors.
Is the backing thickness automatically subtracted?
Yes — the 50.8 µm (2 mil) incompressible polyester backing is automatically removed in calculations for accuracy.
Can I use the RTR on curved surfaces?
Yes. Because you use replica tape, it’s possible to burnish tape onto curved or uneven surfaces and then read using the RTR. This makes it more flexible than rigid-probe only methods in some cases.
Is calibration required before use?
No — it arrives from the factory ready to measure. Calibration verification (zero or using check shim) is recommended regularly or when probe tip or anvil is replaced. The Long-form certificate is included.
How many readings can I store?
Standard model: ~1,000 readings per probe. Advanced: up to ~250,000 readings across probes/batches, with advanced connectivity and WiFi sync.
What standards does the RTR conform to?
ASTM D4417 Method C, ISO 8503-5, NACE SP0287, SSPC-PA 17, SSPC-SP5/SP6/SP10/SP11-87T, plus others.
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 Replica Tape Reader and all the features that come with it
What’s Included:
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PosiTector RTR gauge body (Standard or Advanced)
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RTR probe (burnished test tape read-head)
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High-accuracy burnishing tool and burnishing ball (where appropriate)
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Replica tape grade selection (Coarse, X-Coarse etc.)
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Check shim(s), surface cleaning putty & cleaning cards
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Protective rubber holster, wrist strap, lens shield
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3 × AAA batteries
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USB cable for data download & firmware updates
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Carrying case with shoulder strap
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Long-form Certificate of Calibration traceable to PTB/NIST
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2 year warranty on body & probe
Ensure your surface profile meets specification — get reliable peak-to-valley readings with replica tape and the PosiTector RTR. Supplied by DFT Instruments with full UK calibration, genuine accessories, and responsive technical support.
📞 To enquire about this product, contact our team today on: 01442 879494 or Complete the form.
PosiTector RTR Price:
PRICES FROM £360