The Positest AT-A Automatic Adhesion Tester measures the force required to pull a specified test area of coating away from a substrate using hydraulic pressure. An electronically controlled hydraulic pump automatically applies smooth and continuous pull-off pressure. The pump greatly reduces user effort and the risk of influencing the pulling process.
The AT-A's built-in rechargeable battery performs over 200 tests per charge. The supplied AC adapter / charger allows you to continue testing with AC power while the battery recharges.
The AT-A is features an environmentally sealed enclosure. It is weatherproof, dustproof and shockproof. Meets and even or exceeds IP65 rating.
Portable, hand-operated instrument requires no external power source – ideal for lab and field use.
Large, easy-to-read LCD
Pull Rate Indicator – allows operator to easily monitor and adjust the rate of pull in accordance with international test methods.
Easily select dolly sizes, change measurement units or store readings, with the touch of a button
Conversion charts not required – tester automatically calculates pressure based on dolly size
Inexpensive, single-use dollies eliminate cleaning re-use and can be kept as a permanent record
Each kit comes with everything needed for testing
Weatherproof, dustproof and shockproof
Quality hydraulic pump can be used in any position
Rugged carrying case
One year warranty
Every AT-100 Adhesion Tester pressure system is calibrated and certified to ± 1% accuracy using an NIST traceable load cell
Self-aligning dolly enables accurate measurements on smooth or uneven surfaces
Hi-grade, industrial pressure sensor ensures continued accuracy
Conforms with ASTM D4541/D7234, ISO 4624, SSPC-CS 23.00/AWS C2.23/NACE No. 12, and others
Internal Memory stores maximum pull-off pressure, rate of pull, test duration and dolly size for up to 200 pulls
Optional software available for downloading to a computer
LCD displays pressure value in psi or MPa
10, 14, 20 or 50 mm dollies maximize capability and accuracy across a wide range of bond strengths
* supplied with AT-A
** requires 50mm kit
2 Models: AT-A-20 - with stand-off, cutting tool and 20mm dollies for coatings on metals AT-A-50 - with stand-off, cutting tool and 50mm dollies for coatings on wood, concrete and plastic.
AT-A-20 for coatings on metals Adhesion Range: 100 – 3000 psi (0.7 – 20 MPa) Accuracy: ±1% Full Scale Resolution: 1 psi (0.01 MPa)
AT-A-50 for coatings on wood, concrete and plastics Adhesion Range: 50 – 500 psi (0.4 – 3.5 MPa) Accuracy: ±1% Full Scale Resolution: 1 psi (0.01 MPa)
Environmentally sealed enclosure – weatherproof, dustproof and shockproof - meets or exceeds IP65
10, 14, 20 or 50 mm dollies maximize capability and measurement resolution across a wide range of bond strengths
Rotating display for horizontal and vertical use
Impact and scratch resistant color touch screen with keypad for operation with or without gloves
Record the results as pass/fail and the nature of fracture - cohesive, adhesive and glue failures
Conforms to international standards including ASTM D4541 D7234, ISO 4624 16276-1, AS/NZS 1580.408.5 and others
User selectable measurement units: psi (pounds per square inch), MPa (Megapascal), Nmm2 (Newtons per millimeter square) or Newton (force)
Every PosiTest Adhesion Tester pressure system is calibrated and certified to ± 1% accuracy using a NIST traceable load cell
User adjustable pull rate, pull limit and hold time
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
ATA Self-Alignment Feature
Unequal pulling force during testing caused by uneven adhesive bond lines and coating surfaces can result in random, unexplainable readings. To obtain more repeatable and meaningful adhesion measurements, it is imperative that the pulling force applied to the test dolly is uniformly distributed over the surface being tested.
Both the PosiTest AT-M manual and PosiTest AT-A automatic models compensate for misalignment. The self-aligning, quick-coupling actuator and spherical articulating dolly head enable uniform distribution of the pulling force over the surface being tested, preventing a one-sided pull-off.
20 mm Accessory Kit - PT-AT-20-KIT
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
Includes 20 mm stand-off, 20 mm hole saw and 20 mm
aluminum test dollies (20)
50 mm Accessory Kit - PT-AT-50-KIT
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)
Dollies(loading fixtures, stubs)
New! Dolly Multipacks - Larger quantity at a reduced cost
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)
Adhesive Kit (Order Code: PT-ADHESIVE)
ResinLab EP11HT 2-Part Epoxy
Additional glue, mixing sticks, palettes and cotton swabs