APT Automatic Digital Pull Off Adhesion Tester – 500S Series
Our Automatic Digital Pull Off Tester is a unique instrument designed for adhesion and bond strength testing of all types of films, coatings, laminates, adhesives, metal coatings, plastic coatings, concrete coats, plasters, and other materials.
It is a portable, hand-operated instrument used to measure the force required to pull a specified test diameter of coating away from its substrate using hydraulic pressure. The pressure is displayed on a digital LCD and represents the coating's adhesion strength to the substrate.
The tester evaluates the adhesion, or pull-off strength, of a coating by determining the greatest tensile pull-off force it can withstand before detaching or breaking. Failure points, demonstrated by fractured surfaces, occur along the weakest plane within the system consisting of the dolly, adhesive, coating layers, and substrate.
Specifications
Dolly Size
20 mm standard; 10 mm, 14 mm & 50 mm optional
Resolution
0.01 MPa / 1 psi
Accuracy
±1% full scale
Power
Built-in rechargeable lithium battery with standard charging adapter
Weight
4–5 kg
Dimensions
360 × 75 × 115 mm (L × W × H)
Data Output
USB — data stored directly in Excel file format
Maximum Pull-Off Pressure
10 mm: 0–80 MPa
14 mm: 0–40 MPa
20 mm: 0–20 MPa
50 mm: 0.2–3.2 MPa
Accessories Included
20 mm aluminum test dollies — 20 pcs
Cutting tool for 20 mm dollies
3M adhesive and glue gun
Micro-USB cable
Carrying case
Key Highlights
Portable & Hand-Operated
Compact, hand-operated instrument weighing just 4–5 kg. Designed for both laboratory and on-site field use, with a built-in rechargeable lithium battery and standard charging adapter for uninterrupted operation.
Direct USB Excel Export
Test data is stored and exported directly in Excel file format via USB. This eliminates manual transcription, enabling fast, accurate record-keeping and seamless integration with your quality management workflow.
Multi-Size Dolly System
Supports four dolly diameters — 10 mm, 14 mm, 20 mm (standard), and 50 mm (optional) — covering pull-off pressures from 0.2 MPa up to 80 MPa, suitable for coatings, concretes, laminates, and mortars.
The tester applies a controlled tensile force to a test dolly adhered to the coating. It records the force required to pull off the dolly, measuring adhesion strength according to ASTM D4541 and ISO 4624 standards.
It ensures reliable and precise adhesion measurements, supports detailed data storage and export, and safeguards against overloading. This makes it ideal for consistent quality checks across coatings, paints, and concrete substrates.
The tester is designed for both laboratory and field environments, including construction sites, manufacturing facilities, quality control departments, and research institutions. Its portable design and durable construction make it suitable for demanding testing conditions.
Calibration can be performed either automatically or manually. The included calibration certificate and accessories make it easier to maintain accuracy, repeatability, and compliance with industry testing standards.
It is advisable to back up stored test data regularly, especially when nearing the 500-test memory capacity. Regular backup helps prevent data loss and keeps the device ready for efficient daily operation.
Test data can be exported through USB or RS232 interfaces. This allows easy integration with computers or data management systems for further analysis, documentation, and record keeping.
It is suitable for testing coatings, paint, concrete, laminates, adhesives, films, plastic coatings, metal coatings, plasters, and other bonded surface materials where adhesion or bond strength measurement is required.
The tester includes overload protection and automatic stop functionality. These features help protect the equipment during testing and improve operational safety when working with high pull-off forces.
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