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DeFelsko PosiTest Adhesion Testers

 

at-m manual adhesion tester AT-A automatic adhesion tester

PosiTest AT-M Manual

  • Manual hydraulic pump designed to apply smooth and continuous pressure with a single stroke
  • Pull Rate Indicator to manually monitor and adjust the rate of pull
  • Internal memory stores maximum pull-off pressure, rate of pull, test duration and dolly size for up to 200 pulls
  • Compatible with PosiSoft Desktop for viewing, printing and storing measurement data

PosiTest AT-A Automatic

  • Electronically controlled hydraulic pump automatically applies smooth and continuous pull-off pressure. Greatly reduces user effort and the risk of influencing the pulling process
  • User adjustable pull rate, pull limit and hold time
  • Internal memory stores maximum pull-off pressure, rate of pull, test duration, dolly size, pass/fail, nature of fracture and user notes for 100,000 pulls in up to 1,000 batches
  • Impact and scratch resistant color touch screen with keypad for operation with or without gloves
  • Compatible with PosiSoft Desktop, PosiSoft.net and PosiTector App (Apple iOS and Android)

 

Measure adhesion of coatings to metal, wood concrete and other rigid substrates

Conforms to international standards including ASTM D4541/D7234, ISO 4624/16276-1, AS/NZS 1580.408.5 and others. Available in Automatic or Manual models.

All Models Feature

  • Environmentally sealed enclosure – weatherproof, dustproof and shockproof - meets or exceeds IP65
  • Inexpensive, single-use dollies eliminate cleaning for re-use and can be kept as a permanent record
  • Self-aligning aluminum dolly enables accurate measurements on smooth or uneven surfaces

  Self-aligning aluminum dolly

  • 10, 14, 20 or 50 mm dollies maximize capability and measurement resolution across a wide range of bond strengths
  • Calibrated and certified to + / - 1 percent accuracy using a NIST traceable load cell
  Automatic Models Manual models
adhesion tester automatic adhesion tester manual
Model Order Code ATA20 ATA50 ATM20 ATM50
Dolly size and stand off * 20 mm 50 mm 20 mm 50 mm
Typical Applications Coating on metal Coatings on concrete,
wood and plastic
Coating on metal Coatings on concrete,
wood and plastic
Range 0.7 - 24 MPa
100 - 3500 psi
100 - 7550 N
0.4 - 3.8 MPa
50 - 560 psi
100 - 7550 N
0.7 - 20 MPa
100 - 3000 psi
0.4 - 3.5 MPa
50 - 500 psi
Resolution 0.01 MPa (1 psi)
Accuracy + / - 1 percent Full Scale
* Optional 20 and 50 mm Accessory Kits allow each model to be used with alternative dolly sizes. Custom 10 and 14 mm dollies are available for special applications (compatible with 20 mm stand off)

 

positest at-m kit

All kits include everything needed for testing:

ATA20 and ATM20
    20 mm dollies (20), 20 mm cutting tool, 20 mm stand off

  ATA50 and ATM50
    50 mm dollies (8), 50 mm cutting tool, 50 mm stand off

  Plus...

  • Adhesion Tester
  • built-in rechargeable NiMH battery with charger
  • abrasive pad
  • glue with mixing sticks and palettes
  • cotton swabs
  • USB cable, PosiSoft Software,
  • instruction booklet and video
  • Certificate of Calibration traceable to NIST
  • two-year warranty
  • sturdy, lightweight carrying case

 

positest ata logo

Measures the force required to pull a specified test diameter of coating away from its substrate using hydraulic pressure.

Overview

  • Electronically controlled hydraulic pump automatically applies smooth and continuous pull-off pressure. Greatly reduces user effort and the risk of influencing the pulling process
  • Impact and scratch resistant color touch screen with keypad for operation with or without gloves
  • Built-in rechargeable battery performs over 200 tests per charge. Continue testing with AC power while the battery recharges.
  • Environmentally sealed enclosure – weatherproof, dustproof and shockproof - meets or exceeds IP65
  • Rubberized, shock absorbing grips provide a stable, skid-resistant footing
  • Self-aligning aluminum dolly enables accurate measurements on smooth or uneven surfaces
  • 10, 14, 20 or 50 mm dollies maximize capability and measurement resolution across a wide range of bond strengths. Maximum pull-off pressure by dolly size...
    • 10 mm: 14000 psi (96 MPa)
    • 14 mm: 7000 psi (50 MPa)
    • 20 mm: 3500 psi (24 MPa)
    • 50 mm: 560 psi (3.8 MPa)
  • User selectable measurement units: psi (pounds per square inch), MPa (Megapascal), Nmm2 (Newtons per millimeter square) or Newton (force)
  • User adjustable pull rate, pull limit and hold time
  • Rotating display for horizontal and vertical use
  • Pressure system is calibrated and certified to ± 1 percent accuracy using a NIST traceable load cell
  • Conforms to international standards including ASTM D4541/D7234, ISO 4624/16276-1, AS/NZS 1580.408.5 and others
at-a automatic adhesion tester
positest ata verticle

Memory and Reporting Features

  • Internal memory stores maximum pull-off pressure, rate of pull, test duration and dolly size for 100,000 pulls in up to 1,000 batches
  • Record the results as pass/fail and the nature of fracture - cohesive, adhesive and glue failures
  • Wirelessly connect to your smart device using our free PosiTector App (Apple iOS and Android)
  • Add images and notes using the camera or keyboard
  • Create customized, professional PDF reports
  • Share, backup, synchronize and report measurement data
  • Auto-pairing Bluetooth (BLE) connection

Positector App Features

  • Add images and notes using the camera or keyboard
  • Create customized, professional PDF reports
  • Share, backup, synchronize and report measurement data
  • Auto-pairing Bluetooth (BLE) connection

ata touch screen

Use the touch screen to interact with menu options. Swipe horizontally to navigate between views or vertically to move between batch readings. Alternatively, the keypad can be used for navigation and selection.

pull parameters Batch summary test parameters
User adjustable dolly size, pull rate,
pull limit and hold time.
Batch summary provides an at-a-glance review of test results. View test parameters and reading results. Reading is recorded as pass or fail based on set test parameters. The pass/fail results can be revised.
notes display batch notes fail record
Notes can be added for each reading. Include a note for a batch (group) of readings. Record the nature of failure - cohesive, adhesive and glue failures.

Recording the Nature of the Fracture

Upon completion of a pull-off test, the dolly and coated surface should be examined. In addition to pull-off force, many National and International standards such as ASTM D4541 and ISO 4624 require the nature of the fracture to be recorded.

  • Cohesive fracture: fracture occurs within a coating layer (same coating on dolly face and coated surface).
  • Adhesive fracture: fracture occurs at the interface between layers (coating on dolly face differs from surface).
  • Glue failure: visible separation of the glue from itself, the coating or dolly (no coating visible on the dolly face).

The cohesive and adhesive fracture visual analysis can be recorded using the PosiTest AT-A's keypad or touch screen display. Alternatively, the information can be reported using the PosiTector App.

Fractures are visually estimated and recorded as a percent of each. The two layer example below illustrates a cohesive fracture within coating layer 1 and layer 2 (visually estimated at 50% each). Recorded results are included in reports.

ata dolly face
recording fracture
The PosiTest AT-A can record fracture information for up to five layers. For full details and examples see Visual Analysis and Recording of Test Results.

Model Selection

  • two Models Avaliable with either 20mm or 50mm dollies
Order Code ATA20 ATA50
 Dolly size and stand off* 20 mm 50 mm
 Typical Applications Coatings on metal Coatings on concrete,
wood and plastic
Range 0.7 - 24 MPa
100 - 3500 psi
100 - 7550 N
0.4 - 3.8 MPa
50 - 560 psi
100 - 7550 N
Resolution 0.01 MPa (1 psi)
Accuracy + / - 1 percent Full Scale
Kits Include

ATA20: 20 mm dollies (20), 20 mm cutting tool and 20 mm stand off
ATA50: 50 mm dollies (8), 50 mm cutting tool and 50 mm stand off

Automatic Adhesion Tester, built-in rechargeable NiMH battery with charger, abrasive pad, glue with mixing sticks and palettes, cotton swabs, USB cable, PosiSoft Software, instruction booklet and video, Certificate of Calibration traceable to NIST, two-year warranty, and a sturdy, lightweight carrying case

*Optional 20 and 50 mm Accessory Kits allow each model to be used with alternative dolly sizes. Custom 10 and 14 mm dollies are available for special applications (compatible with 20 mm stand off).

 

PosiTest AT-M Manual Pull-Off Adhesion Tester

Measures the force required to pull a specified test diameter of coating away from its substrate using hydraulic pressure.

Key Features...

  • Manual hydraulic pump designed to apply smooth and continuous pressure with a single stroke
  • Pull Rate Indicator to manually monitor and adjust the rate of pull
  • Environmentally sealed enclosure  weatherproof, dustproof and shockproof - meets or exceeds IP65
  • Self-aligning aluminum dolly enables accurate measurements on smooth or uneven surfaces
PosiTest AT-M Manual Pull-Off Adhesion Tester
  • 10, 14, 20 or 50 mm dollies maximize capability and measurement resolution 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: 500 psi (3.5 MPa)
  • Every PosiTest Adhesion Tester pressure system is calibrated and certified to + / - 1 percent accuracy using a NIST traceable load cell
  • Internal memory stores maximum pull-off pressure, pull rate, test duration and dolly size for up to 200 pulls
  • Compatible with PosiSoft Desktop software for viewing, printing and storing measurement data
  • Conforms to international standards including ASTM D4541/D7234, ISO 4624/16276-1, AS/NZS 1580.408.5 and others

Model Selection

  • Two models available with either 20 mm or 50 mm dollies
 
 Order Code ATM20 ATM50
 Dolly size and stand off* 20 mm 50 mm
 Typical Applications Coatings on metal Coatings on concrete,
wood and plastic
 Range 0.7 - 20 MPa
100 - 3000 psi
0.4 - 3.5 MPa
50 - 500 psi
 Resolution 0.01 MPa (1 psi)
 Accuracy + / - 1 percent Full Scale

 Kits Include

 

 

 

ATM20: 20 mm dollies (20), 20 mm cutting tool and 20 mm stand off
ATM50: 50 mm dollies (8), 50 mm cutting tool and 50 mm stand off

Manual Adhesion Tester, built-in rechargeable NiMH battery with charger, abrasive pad, glue with mixing sticks and palettes, cotton swabs, USB cable, PosiSoft Software, instruction booklet and video, Certificate of Calibration traceable to NIST, two-year warranty, and sturdy, lightweight carrying case

*Optional 20 and 50 mm Accessory Kits allow each model to be used with alternative dolly sizes. Custom 10 and 14 mm dollies are available for special applications (compatible with 20 mm stand off).

 

Are the PosiTest AT instruments rugged?
Absolutely. With an environmentally sealed, metal enclosure, heavy-duty hydraulic pump and a high grade industrial pressure sensor, both the Manual and Automatic PosiTest AT are built to last. They can be used indoors, outdoors and in all types of weather.

How are the Manual and Automatic PosiTest Adhesion Testers calibrated at DeFelsko?
The Manual and Automatic PosiTest Adhesion Testers are calibrated against known conditions using NIST traceable equipment. A Certificate of Calibration containing actual measurements is included with every tester.

How much time should be allowed for the included Resinlab EP11HT Gray to cure?

Full cure can be obtained after 24-48 hours at room temperature. Cure time can be accelerated by the application of heat. See Technical Data Sheet for full details.

 

Are curved dollies available for convex surfaces?
We do not provide or support the use of curved dollies for adhesion testing.

In addition to affecting the surface area used in calculating pull-off strengths and the direction of the force lines (creating unwanted shear forces), most adhesion testing standards specifically call for the use of flat dollies.

adhesive gapFeedback from our customers is that most internal or external pipe applications greater than 200 mm in diameter do not require curved dollies for satisfactory results. In such cases the maximum glue gap between the surface of the dolly and the coating is 0.5 mm.

For smaller pipe diameters, depending on the expected pull-off strength of the coating, it may be possible to use a 10 mm or 14 mm dolly. The smaller surface areas of the dollies will allow them to sit flatter on the curved surface. The height of the actuator pulling the dolly becomes the limiting factor within internal diameters. External diameters can be decreased to as low as 50 mm and 100 mm respectively.

If you have more specific information on the application it may be possible to provide a more definitive response.


Can pull-off adhesion tests be conducted underwater?
The PosiTest can be used for underwater measurement provided only the cable and actuator are placed under the surface. In such cases, the following precautions should be taken:

  • The standoff and actuator should be thoroughly dried immediately upon completion of testing.
  • Once dried, a generous amount of lubricant should be applied to discourage corrosion (rust).

Note: During measurement, the manual PosiTest AT may require more than one continuous stroke to complete the test. This differs from our recommendation in the instruction manual and operational video.

PosiTest adhesion testers can be specifically manufactured with longer pressure hoses to facilitate underwater measurement.

Where does failure occur?
Tensile adhesion pulls are evaluated in pounds per square inch (psi) or megapascals (MPa), and visually, as follows:

dolly face

  • Cohesive fracture: fracture occurs within a coating layer (same coating on dolly face and coated surface).
  • Adhesive fracture: fracture occurs at the interface between layers (coating on dolly face differs from surface).
  • Glue failure: visible separation of the glue from iteself, the coating or dolly (no coating visible on the dolly face).

 

 

cohesive adhesive

PosiTest AT-A models can record fracture information for up to five layers.

PosiTest AT - Adhesion Tester
ATM20A PosiTest  AT Manual Pull-Off Adhesion Tester 0 - 3000 PSI / 0 - 20 MPa / 20MM DOLLY
ATM50A PosiTest  AT Manual Pull-Off Adhesion Tester 0 - 3000 PSI / 0 - 20 MPa / 50 MM DOLLY
ATA20A-B PosiTest AT Automatic Pull-Off Adhesion Tester 0 - 3000 PSI / 0 - 20 MPa / 20MM DOLLY
ATA50A-B PosiTest AT Automatic Pull-Off Adhesion Tester 0 - 3000 PSI / 0 - 20 MPa / 50MM DOLLY
AT50KIT PosiTest AT Includes 50 mm stand-off, holesaw and test dollies (12) 0 - 500 psi / 0 - 3.5 MPa
DOLLY10 PosiTest AT Additional 10 mm dollies (10)
DOLLY14 PosiTest AT Additional 14 mm dollies (10)
DOLLY20 PosiTest AT Additional 20 mm dollies (10)
DOLLY50 PosiTest AT Additional 50 mm dollies (4)
DOLLY10APK100 Multipacks PosiTest AT Additional 10 mm dollies (100)
DOLLY14APK100 Multipacks PosiTest AT Additional 14 mm dollies (100)
DOLLY20APK100 Multipacks PosiTest AT Additional 20 mm dollies (100)
DOLLY50APK50 Multipacks PosiTest AT Additional 20 mm dollies (50)
ATADHESIVEKIT PosiTest AT Adhesive Kit (additional adhesive, mixing sticks, palettes, cotton swabs)
TMPLTAS PosiTest AT Drilling Template for 50 mm Dollies
ATVERIFY PosiTest AT Verifier

 

50 mm Accessory Kit

50 mm Accessory Kit (Order Code: AT50KIT)

  • Interchangeable standoff allows a PosiTest ATM20 or ATA20 to pull 50 mm dollies
  • Ideal for lower bond strength finishes such as coatings
    on wood, concrete and plastic
  • Larger surface area of dolly provides improved low range
    precision and repeatability
  • Includes 50 mm stand-off, 50 mm hole saw and 50 mm
    aluminum test dollies (12)
20 mm Accessory Kit (Order Code: AT20KIT)

20 mm Accessory Kit (Order Code: AT20KIT)

  • Interchangeable standoff allows a PosiTest ATM50 or ATA50 to pull 10, 14 and 20 mm dollies
  • Ideal for high bond strength finishes such as coatings
    on metal
  • Includes 20 mm stand-off, 20 mm hole saw and 20 mm
    aluminum test dollies (20)
Dollies

Dollies (loading fixtures, stubs)

Size Quantity Order Code
10 mm 10 DOLLY10
14 mm 10 DOLLY14
20 mm 10 DOLLY20
50 mm 4 DOLLY50
Multipacks Dollies

New! Multipacks - Larger quantity at a reduced cost

Size Quantity Order Code
10 mm 100 DOLLY10APK100
14 mm 100 DOLLY14APK100
20 mm 100 DOLLY20APK100
50 mm 50 DOLLY50APK50
Drilling Template for 50 mm Dollies

Drilling Template for 50 mm Dollies (Order Code: TMPLTAS)

  • Drilling template and drill bits to isolate test area, ideal for thicker coatings on concrete
  • Includes (10) drill bits 5/32" (4 mm)
glue kit

Glue Kit (Order Code: ATADHESIVEKIT)

  • ResinLab EP11HT 2-Part Epoxy
  • Additional glue, mixing sticks, palettes and cotton swabs
PosiTest AT Verifier PosiTest AT Verifier (Order Code: ATVERIFY)

Ideal for checking the accuracy and operation of PosiTest Adhesion Testers and is an important component in fulfilling both ISO and in-house quality control requirements.

The PosiTest AT Verifier and included documents allow the user to certify the accuracy of PosiTest Adhesion Testers.

 

ATM20A
POSITEST AT-M MANUAL ADHESION TESTER -20MM KIT
Mfg. item #: ATM20A
DEFATM20A
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$1,895.00

154
ATM50A
POSITEST AT-M MANUAL ADHESION TESTER -50MM KIT
Mfg. item #: ATM50A
DEFATM50A
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$1,895.00

154
ATA20A-B
POSITEST AT-A AUTOMATIC ADHESION TESTER -20MM KIT
Mfg. item #: ATA20A-B
DEFATA20A-B
lease to own for as little as:$52 per month!
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$2,595.00

154
ATA50A-B
POSITEST AT-A AUTOMATIC ADHESION TESTER -50MM KIT
Mfg. item #: ATA50A-B
DEFATA50A-B
lease to own for as little as:$52 per month!
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$2,595.00

154
AT50KIT
50 MM ACCESSORY KIT FOR POSITEST ADHESION TESTER
Mfg. item #: AT50KIT
DEFAT50KIT
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$250.00

154
DOLLY10
DOLLY 10MM -PKG OF 10 FOR POSITEST ADHESION TESTER
Mfg. item #: DOLLY10
DEFDOLLY10
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$40.00

154
DOLLY14
DOLLY 14MM-PKG OF 10 FOR POSITEST ADHESION TESTER
Mfg. item #: DOLLY14
DEFDOLLY14
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$40.00

154
DOLLY20
DOLLY 20MM-PKG OF 10 FOR POSITEST ADHESION TESTER
Mfg. item #: DOLLY20
DEFDOLLY20
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$25.00

154   6
DOLLY50
DOLLY 50MM -PKG OF 4 FOR POSITEST ADHESION TESTER
Mfg. item #: DOLLY50
DEFDOLLY50
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$40.00

154
DOLLY10APK100
DOLLY 10MM -PKG OF 100 FOR POSITEST ADHESION TESTER
Mfg. item #: DOLLY10APK100
DEFDOLLY10AP{00
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$350.00

154
DOLLY14APK100
DOLLY 14MM -PKG OF 100 FOR POSITEST ADHESION TESTER
Mfg. item #: DOLLY14APK100
DEFDOLLY14AP{00
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$350.00

154
DOLLY20APK100
DOLLY 20MM -PKG OF 100 FOR POSITEST ADHESION TESTER
Mfg. item #: DOLLY20APK100
DEFDOLLY20AP{00
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$225.00

154   1
DOLLY50APK50
DOLLY 50MM -PKG OF 50 FOR POSITEST ADHESION TESTER
Mfg. item #: DOLLY50APK50
DEFDOLLY50APK50
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$450.00

154
ATADHESIVEKIT
ADHESIVE KIT FOR POSITEST ADHESION TESTER
Mfg. item #: ATADHESIVEKIT
DEFATADHESIV{00
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$35.00

154
TMPLTAS
DRILLING TEMPLATE KIT FOR POSITEST ADHESION TESTER
Mfg. item #: TMPLTAS
DEFTMPLTAS
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$125.00

154
ATVERIFY
POSITEST AT VERIFIER FOR ADHESION TESTERS
Mfg. item #: ATVERIFY
DEFATVERIFY
lease to own for as little as:$56 per month!
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$2,795.00

154
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