DPT/40 Digital Pull Off Strength Tester – For Concrete & Tile Adhesive Test
Our DPT/40 Digital Pull Off Tester is a unique instrument for adhesion and bond strength testing of all types of films, coatings, laminates, adhesives, metal plastic coatings, concrete coats, mortars, 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 strength of adhesion 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 bear before detaching. Breaking points, demonstrated by fractured surfaces, occur along the weakest plane within the system consisting of the dolly, adhesive, coating layers, and substrate.
Specifications
Measuring Range
0 – 40.0 kN
Resolution
0.001 kN
Accuracy
Better than 1.0% (F.S)
Display Mode
kN, MPa — customizable and adjustable
Hydraulic Cylinder Stroke
8 mm
Data Store
500 or more test results
Peak Hold
Yes
Automatic Power Off
Yes
Power Supply
8.4V high capacity lithium battery with standard charging adapter
Weight
2 – 4 kg
Dimensions
360 × 75 × 115 mm (L × W × H)
Accessories Included
20 mm aluminum test dollies — 10 pcs
Cutting tool for 20 mm dollies
Epoxy adhesive
Carrying case
Key Highlights
Stable Digital Pressure Display
Features a high-stability digital pressure display with liquid crystal backlighting. Readings are shown in kN or MPa — customizable and adjustable — with peak hold function to capture the exact pull-off force at failure.
Unique Screw Rod Pressure Design
Engineered with a unique screw rod pressure mechanism that ensures smooth, precise, and consistent force application during testing. This design minimises operator error and improves repeatability across all test cycles.
Concrete & Tile Bond Testing
Specifically suited for concrete compressive strength tests and bond strength evaluation of facing bricks and exterior wall tiles. Stores 500+ test results onboard and meets EN, BS, and ASTM international test standards.
The tester uses a manual hydraulic pump to apply a controlled tensile pull-off force to a test dolly bonded to the coating surface. The force required to detach the dolly is displayed on the digital LCD, measuring adhesion strength in accordance with ASTM D4541 and ISO 4624 standards.
The DPT/40 has a measuring range of 0–40.0 kN with a resolution of 0.001 kN and accuracy better than 1.0% (F.S). Results can be displayed in either kN or MPa — both units are customizable and adjustable on the instrument.
The DPT/40 is suited for both laboratory and field environments including construction sites, manufacturing facilities, quality control departments, and research institutions. Its compact and lightweight build makes it easy to carry and operate under demanding field conditions.
The standard dolly size is 20 mm. Optional dolly sizes of 10 mm and 14 mm are also available to accommodate different coating thicknesses and substrate types, allowing greater flexibility in testing various surface systems.
The DPT/40 is suitable for testing coatings, paints, laminates, adhesives, concrete, plasters, mortars, films, plastic coatings, and metal coatings — any surface material where adhesion or bond strength measurement is required.
The digital LCD display eliminates reading errors associated with analogue dial gauges, providing clear and precise results. The digital readout also allows for faster data recording and easier comparison across multiple tests.
The DPT/40 complies with a comprehensive set of international standards: EN 1542-1999, EN 1015-12, EN 1348, BS 1881-207, ASTM D 4541, ASTM C 1583, ASTM D 7234-05, and ASTM D 7522 — covering concrete, tile adhesive, mortar, and general coating adhesion testing requirements.
The aluminum test dolly is bonded to the prepared coating surface using the included epoxy adhesive. After curing, the dolly is attached to the instrument's coupling and hydraulic pressure is applied until the dolly detaches, recording the peak pull-off force.
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