PosiTector® RTR 3D

Replica Tape Reader to Measure and Record 2D/3D Surface Profile Parameters

Digital spring micrometers measure and record surface profile parameters using Testex Press-O-Film™ replica tape.
  • Create a replica by burnishing tape on a surface and insert into instrument. 3D imagery and 2D/3D parameters are displayed in seconds!
  • Reports common parameters: Ra, Rq, Rz, Rp, ­Rv, Rt, Rpc (2D), and Sa, Sq, Sz, Sp, Sv, and Spd (3D)
  • Ideal for field or laboratory use; flat, curved or irregular surfaces
  • Certified and traceable to an accredited national laboratory
  • Download 3D .SDF image files for analysis in included PosiSoft or third party ­­­software
  • Certificate of Calibration showing traceability to PTB (for H and HL only) and NPL (for Ra and Rt) included (Long Form)
Conforms to ASME B46, ASTM D4417, ISO 8503-5, NACE SP287, SSPC-PA 17, SSPC-SP5, SP6, SP10, SP11-87T and others


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  • Measures peak height (HL) and common 2D/3D profile parameters such as Ra, Rz, Sq, Spd and more
  • High contrast, color LCD
  • Enhanced one-handed menu navigation
  • RESET feature instantly restores factory settings
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  • Solvent, acid, oil, water and dust resistant - weatherproof
  • Rugged indoor/outdoor instrument – ideal for field or laboratory use; flat, curved or irregular surfaces
  • Shock-absorbing, protective rubber holster with belt clip
  • Two year warranty on gage body AND probe
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  • Certificate of Calibration (containing Ra and Rt measurements) showing traceability to an accredited national laboratory included
  • Conforms to national and international standards including ISO and ASTM
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  • Selectable display languages
  • High contrast LCD with backlit display
  • Flip display enables right-side-up viewing
  • Uses alkaline or rechargeable batteries (built-in charger)
  • Mils/Microns switchable
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  • Calculates and records all fourteen 2D and 3D parameters (below) with each measurement
  • Screen Capture – save screen images for record keeping and review
  • Sealed USB port for fast, simple connection to a PC and to supply continuous power. USB cable included
  • PosiSoft USB Drive - stored readings and graphs can be accessed using universal PC/Mac web browsers or file explorers. No software required.
  • Every stored measurement is date and time stamped
  • Software Solutions for viewing, analyzing & reporting data
  • Apply short and long cutoff filters and discard lengths to optimize the analysis for a specific application
  • Orient the 2D trace between horizontal, vertical and diagonal (XY, YX)

Standard Models

Includes ALL features as shown above plus...
Includes ALL features as shown on left plus...
  • Storage of 250 readings per probe—stored readings can be viewed or downloaded

Advanced Models

Includes ALL features as shown above plus...
Includes ALL features as shown on left plus...
  • Storage of 100,000 readings in up to 1,000 batches
  • Live graphing of measurement data
  • Download high resolution Surface Data Files (.SDF) for analysis in the included PosiSoft or third-party software
  • Generates two dimensional (2D) and three dimensional (3D) thumbnail images Ideal for inclusion into reports and confirming consistent blasting results.
  • Onscreen Batch Annotation—add notes, change batch names and more with built-in QWERTY keyboard
  • WiFi technology wirelessly synchronizes with PosiSoft.net and downloads software updates
  • Bluetooth 4.0 Technology for data transfer to a mobile device running the PosiTector App or optional portable printer. BLE API available for integration into third-party software.
  • Integrate with third-party software, drones, ROVs, PLCs, and robotic devices using several industry-standard communication protocols
All gages come complete with stainless steel burnishing tool, burnishing ball, 5 cleaning cards, check shim(s), microfiber cleaning cloth, surface cleaning putty, protective rubber holster with belt clip, wrist strap, 3 AAA alkaline batteries, instructions, nylon carrying case with shoulder strap, protective lens shield, Long Form Certificate of Calibration (containing Ra and Rt values) traceable to an accredited national laboratory, USB cable, PosiSoft Software, two (2) year warranty on body and probe.
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Measuring Range (H)
20 – 115 μm
0.8 – 4.5 mils
Measuring Range (Rt)
10 – 115 μm
0.4 – 4.5 mils
Minimum Roughness (Ra)
2 μm
0.08 mil/80 μin
Accuracy (H)
± 5 μm
± 0.2 mil
Accuracy (Rt)*
± (5 μm + 5%)
± (0.2 mil+ 5%)
Accuracy (Ra)*
Anvil Pressure
± (0.01 mil + 5%)
± (0.25 μm + 5%)
Anvil Size
110 grams-force
Field of View
1.1 Newtons
Ø0.25 inch
Lateral Sampling
Vertical Resolution
0.149 x 0.149 inch
Ø6.35 mm
Measuring Range (H)
0.145 mil
3.8 x 3.8 mm
3.93 μin - 2D/3D, 0.393 μin - SDF
3.7 μm
100 nm - 2D/3D, 10 nm - SDF
0.01 mils
0.1 μm
* When measured using Optical Grade X-Coarse Replica Tape
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How It Works

prepare the surface with cleaning putty



Preparation of both the surface to be tested and the PosiTector RTR 3D are necessary before performing the test.

To prepare surface:

  • Use cleaning putty to remove dust, debris, or residual blast media from the measurement site by firmly pressing the putty onto surface to be tested using your fingers and remove

To prepare the PosiTector RTR 3D:

  • Clean anvils and camera lens using included cleaning card. Swipe card through opening a few times while firmly pressing both probe buttons to remove dust
  • Zero probe and verify accuracy with included shim
  • Ensure correct grade of replica tape is displayed in upper left hand corner of LCD
burnish the replica tape



Testex Press-O-Film™ replica tape consists of a layer of compressible foam affixed to an incompressible polyester film of highly uniform thickness. When pressed against a surface, the foam forms an impression, or reverse replica, of the surface. For best results when acquiring 2D/3D parameters and images from the PosiTector RTR 3D, it is recommended to use the supplied burnishing ball instead of the stainless-steel burnishing tool.

  • Adhere the replica tape to the surface to be burnished.
  • Holding the ball in two hands using your index fingers and thumbs, place the ball on the replica tape.
  • Gently roll the ball over the tape while viewing the burnished tape through the clear ball. Adjust the force applied to the ball until a replica of the surface begins to appear on the tape.
  • Continue to roll the ball until the tape is completely burnished (at least 30 seconds).
measure with PosiTector RTR



After placing the compressed tape (replica) into the PosiTector RTR 3D a light-intensity versus thickness algorithm is used to produce a three dimensional (3D) image of the replicated surface.

  • Insert the burnished replica tape into the measurement opening. Ensure the tape is properly positioned so that the burnished region is centered within the opening in the probe with the adhesive (sticky) side down.
  • To position the tape, move the Testex™ Press-O-Film™ replica tape to the back of the probe and align the two dots (printed on replica tape) with arrows on both sides of the measurement opening.
  • Once positioned, firmly press both probe buttons simultaneously and hold until the PosiTector RTR 3D beeps and the measurement is displayed.
illustration showing how replica tape works
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Step 1: Choose a gage body


PosiSoft Desktop

Powerful desktop software for downloading, viewing, printing and storing measurement data. No internet connection required.

  • Simple, intuitive user interface
  • Import readings directly from the gage via USB or from legacy PosiSoft desktop versions
  • Synchronize measurement data including readings, notes and pictures to and from PosiSoft.net
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The .SDF viewer built into the FREE PosiSoft Desktop software allows for analysis of measurements obtained from the PosiTector RTR 3D. Extract and analyze a trace from the 3D plot, change filtering settings, and view 2D and 3D parameters from the easy-to-use interface.

PosiSoft Custom PDF Report Generator

Create custom, professional PDF reports with imagery and surface profile parameters with PosiSoft Desktop’s easy-to-use report generator
Easily create reports from your measurement data in seconds
  • Generate custom, professional PDF reports
  • Include inspection information such as on-site pictures, screen captures, notes and more to communicate important details
  • Create and save multiple custom layouts as templates – insert cover pages, add logos/images, and select font and point size
  • Select the information to include for each product type – charts, histograms, readings, time stamps and more
  • Compile multi-batch reports from one or more probes and instrument types



Do your instruments require any formal training for use? Do you offer ‘demo’ models?

No. Our instruments are designed for simple operation, feature easy-to-use menus, both full and quick instruction manuals, and helpful videos. In lieu of demonstration models, we provide unlimited technical support via telephone and/or email, and a limited 30-day money back guarantee.


What is replica tape?

Replica tape is a long-known method for characterizing a surface. It is simple, relatively inexpensive, and shows good correlation with results from other methods. It has the advantages of ruggedness, relatively low start-up cost, good repeatability and the option of retaining a physical replica of the surface being evaluated. The method is widely used and widely understood. It is particularly useful for measurements on curved surfaces that are difficult to measure directly with other instruments.

It is therefore not surprising that it has become the most popular field method for measuring surface profile. Its operation is described in a number of international standards including ASTM D4417, ISO 8503-5, NACE SP0287, and AS 3894.5.

Image illustrates process of burnishing and measuring replica tape.

Is the PosiTector RTR 3D calibrated at the factory?

The PosiTector RTR 3D arrives fully calibrated and ready to measure. A Long-Form Certificate of Calibration traceable to PTB (for H and HL only) and NPL (for Ra and Rt) is included, which documents actual Rt and Ra readings taken by your instrument at our calibration laboratory on standards traceable to a national metrology institute. Beware of ‘Certificates’ or ‘Certificates of Conformance’ offered by competitors. These typically do not include actual instrument readings, and are often insufficient to meet common quality requirements.


Which replica tape grade should I use?

For most applications, Optical Grade XC is the appropriate tape grade. The PosiTector RTR 3D has been calibrated using the Optical Grade XC tape and the XC tape setting. When measuring 2D and 3D parameters, Optical Grade XC should be used. When measuring peak to valley height using the H parameter, it is possible to use either Optical or Regular C and XC tape.


What is a 2D thumbnail image?

A black and white two dimensional (2D) image is essentially a photograph of the burnished tape. It reveals a pattern of dark and light spots similar to what you might see if you put the replica tape in front of a light source. The bright areas are higher compressed tape (peaks) and dark areas are lower compressed tape (valleys). This image can be exported for inspection reports. Advanced models only.

2D Thumbnail Image

What is a 3D thumbnail image?

The PosiTector RTR 3D uses a light intensity versus thickness algorithm to produce three dimensional (3D) images of the replicated surface. A low-resolution color image is quickly generated and displayed on the PosiTector which can also be exported into inspection reports. Advanced models only.

3D Thumbnail Images

What software does DeFelsko recommend for use with the PosiTector RTR 3D?

The FREE PosiSoft Desktop software provides a simple, easy to use interface to import and analyze high-resolution .sdf files generated by the PosiTector RTR 3D. Within PosiSoft Desktop, a trace from the 3D plot can be analyzed, filtering settings can be modified, and 2D and 3D parameters can be viewed. If more detailed analysis is required, DeFelsko recommends OmniSurf and OmniSurf 3D produced by Digital Metrology (www.digitalmetrology.com).


PosiTector Gage BodiesPosiTector Gage Bodies

PosiTector Gage Bodies can be used with all PosiTector probes. Choose from Standard or Advanced models.

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PosiTector ProbesPosiTector Probes

PosiTector bodies accept all PosiTector probes easily converting from a coating thickness gage to a surface profile gage, dew point meter, soluble salt tester, hardness and ultrasonic thickness gage.

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Bluetooth PrinterBluetooth Printer

Battery-operated and light weight, this Bluetooth Printer prints readings and statistical summaries via Bluetooth from Advanced models.

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PosiTector CasePosiTector Case

Convenient hard shell case for carrying a PosiTector gage body and multiple probes

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Testex™ Press-O-Film™ Replica TapeTestex™ Press-O-Film™ Replica Tape

50 pieces (impressions) per roll

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AC Power KitAC Power Kit

Use for continuous operation or battery charging. This kit supplies several alternate power solutions for your battery-operated PosiTector. Operate your gage without the need for batteries.

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Certified PosiTector RTR Shim SetCertified PosiTector RTR Shim Set

Used to verify the accuracy and operation of PosiTector RTR and other spring micrometer replica tape readers

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Pelican Cases for PosiTector Inspection KitsPelican Cases for PosiTector Inspection Kits

Heavy-duty, waterproof Pelican cases complete with a custom foam insert to securely hold your PosiTector instrument.

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Burnishing BallBurnishing Ball

For best results when acquiring a 2D/3D parameters and images, it is recommended to use the supplied burnishing ball instead of the stainless-steel burnishing tool.

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PosiTector RTR Check ShimPosiTector RTR Check Shim

Used to check PosiTector RTR peak height accuracy (RTR H and RTR 3D). One check shim is included with each probe.

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Replica Tape HolderReplica Tape Holder

For best results and to minimize the migration of adhesive from the tape to the probes measurement system, DeFelsko recommends using the supplied tape holder.

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Surface Cleaning PuttySurface Cleaning Putty

To clean the test surface of debris prior to burnishing

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Cleaning CardsCleaning Cards

Pre-moistened with isopropyl alcohol to clean residual adhesive and debris from the anvils helping to insure an accurate test.

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Stainless Steel Burnishing ToolStainless Steel Burnishing Tool

Round-end (Ø8 mm) rubbing tool to compress replica film on the blasted surface.

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Protective Lens ShieldProtective Lens Shield

Pack of 5 thin plastic lens shields to protect PosiTector display from paint overspray. One lens shield included in every PosiTector purchase.

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Rechargeable BatteriesRechargeable Batteries

Precharged batteries ready to use with a considerably longer run time than conventional Nickel Cadmium batteries. High performance in low temperatures and no charger required.

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PosiTector RTR Check TapePosiTector RTR Check Tape

Used to check the operation of PosiTector RTR 3D peak density measurement (for use with the PosiTector RTR 3D only).

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