DeFelsko PosiTest AT-A Automatic Adhesion Tester

DeFelsko’s PosiTest® AT-A Automatic Adhesion Tester measures coatings adhesion on metal, wood, concrete, and other rigid substrates.

SKU: DEF-ATA20A-B Category: Tags: ,


DeFelsko PosiTest® AT-A Automatic Adhesion Tester for testing coatings adhesion on metal, wood, concrete, and other rigid substrates. The AT-A’s electronically-controlled hydraulic pump is push-button-operated, eliminating the need for manual priming, or pumping of the hydraulic system.

PosiTest AT-A also features a new high-resolution, impact and scratch-resistant, colour Touch Screen display with controls identical to the digital keypad. A full digital keypad allows the user to select pull-off pressure, pull rate, dolly size, as well as to change measurement units or store readings in the gauge. User-selectable pull rate, pull limit, dolly size, and hold time, ensure conformance to international standards for a wide range of test applications.

Additional new features of the Automatic Adhesion Tester include the ability to record Pass/Fail results and identify the type of coating failure – cohesion, adhesion, and glue failures. Internal memory stores data for up to 100,000 pulls in up to 1,000 batches, including maximum pull-off pressure, rate of pull, test duration, dolly size, and the pass/fail information.

The rubberized, impact-resistant end caps on the PosiTest Automatic Adhesion Tester provide an ergonomic grip, and stable, skid-resistant footing. AT-A also features a built-in, rechargeable NiMH battery, shoulder strap, and AC power option for greater versatility and convenience of use. Both models of PosiTest Adhesion Tester have the PosiTest Self-Aligning Dolly System which allows the dolly-head to articulate in the actuator to compensate for uneven surfaces, making possible a proper, vertical pull, and ensuring reliable, repeatable test results.


  • Portable; requires no external power source
  • Pull-rate indicator allows user to monitor and adjust rate of pull
  • Internal Memory stores maximum pull-off pressure, rate of pull, test duration, and dolly size
  • Environmentally-sealed enclosure is weatherproof, dustproof, and shockproof; ingress protection IP65
  • Self-Aligning Dolly System to enable accurate measurements on smooth or uneven surfaces
  • 10, 14, 20, or 50 mm dollies maximize capability and accuracy across a wide range of bond strengths:
    • 10 mm: 10000 psi (70 MPa)
    • 14 mm: 6000 psi (40 MPa)
    • 20 mm: 3000 psi (20 MPa)
    • 50 mm: 480 psi (3.3 MPa)
    • 50×50 mm: 375 psi (2.585 MPa)
  • Large, easy-to-read LCD display of pressure, rate of pull, and holds maximum test value
  • Calibration and certification to + 1% accuracy, using NIST-traceable load cell
  • 2-year manufacturer’s warranty
  • Conforms to national and international standards including ASTM D4541/D7234, ISO 4624/16276-1, AS/NZS 1580.408.5 and others

Features Unique to the updated PosiTest AT-A Automatic Adhesion Tester include:

  • Electronically-controlled hydraulic pump; automatically applies smooth and continuous pull-off pressure, reducing effort and risk of user influence on pulling process
  • Pull-off strength of up to 3500 psi (24 MPa, 7550 N) with 20 mm dollies
  • Full digital keypad controls of all aspects of the adhesion test
  • Impact-resistant, high-resolution, colour Touch Screen display with fully redundant keypad, enables operation with or without gloves
  • User-selectable dolly size, pull rate, pull limit, pull-off pressure, hold time, memory storage at the push of a button
  • Wireless connection to your smart device using free PosiTector mobile app to create and share customized, professional PDF reports
  • Record results as Pass/Fail, and the nature of the failure – cohesion, adhesion, glue failure
  • Compatible with PosiSoft Desktop, PosiTector App,, and PosiSoft USB Drive
  • Environmentally-sealed metal enclosure ingress-protected to IP65
  • Impact and scratch-resistant display
  • Heavy-duty hydraulic pump with high-grade industrial pressure sensor
  • Rubberized, impact-resistant end caps for sure, comfortable grip, and skid resistant footing
  • Built-in, rechargeable battery performs 200 or more test on a charge; testing can continue on AC-power while battery is being recharged
  • Universal AC-adaptor battery charger

Four kit options are available for the DeFelsko PosiTest AT-A Automatic Adhesion Tester:

Kits20 mm Kit50 mm Kit50 x 50 mm Tile Kit50 mm C1583 Kit
Range0.7 – 20 MPa
100 – 3000 psi
0.4 – 3.3 PMa
50 – 480 psi
0.4 – 2.585 MPa
50 – 375 psi
0.4 – 3.3 MPa
50 – 480 psi
Typical ApplicationHigher bond strength coatings on metal substratesLower bond strength coatings on wood, concrete, and plasticCementitious adhesive for tilesConcrete surfaces and overlays
Included Dolliesø20mm (qty 20)
ø50 mm (qty 83)
50 x 50 mm Plate (qty 4) with threaded post
ø50 mm (qty 4) with > 25 mm thickness
Cutting Tool20 mm hole saw50 mm hole saw– –50 mm diamond grit hole saw with arbor
AdhesiveResinLab EP11HT 2-Part EpoxyResinLab EP11HT 2-Part EpoxyResinLab EP11HT 2-Part EpoxyResinLab EP11HT 2-Part Epoxy4
Resolution0.01 MPa (1 psi)0.01 MPa (1 psi)0.01 MPa (1 psi)0.01 MPa (1 psi)
Accuracy+ 1% Full Scale+ 1% Full Scale+ 1% Full Scale+ 1% Full Scale

In addition, Conversion Kits are available for all dolly types: 20 mm, 50 mm low bond-strength, 50 x 50 mm Tile Conversion Kit, and 50 mm C1583 Conversion Kit. The addition of any conversion kit to the allows the PosiTest AT-A to be used in a broad range of applications.

Stone Tucker Instruments is able to certify your PosiTest Automatic Adhesion Tester.

Weight5897 g
Dimensions407 × 305 × 153 mm

The PosiTest AT-A Automatic Adhesion Tester Kit comes with:

  • PosiTest AT-A Automatic Adhesion Tester
  • Rechargeable NiMH Battery with Charger
  • Dollies with Stand-off and Cutting Tool
  • Abrasive Pad
  • Adhesive with Mixing Sticks and Palettes
  • Cotton Swabs
  • USB Cable
  • PosiSoft Software
  • Instruction Booklet and Video
  • Shoulder Strap
  • Certificate of Calibration traceable to NIST
  • Carrying Case

20mm Conversion Kit

50mm Conversion Kit

50mm C1583 Conversion Kit

50 x 50 Tile Conversion Kit

DeFelsko Adhesive Kit

Click here to download the DeFelsko AT Series Datasheet