Scratch Hardness Tester

The DUR-O-Test uses a needle under an adjustable pressure spring to create a scratch on the coated surface.

• Can be used for flat or curved surfaces
• Pocket size device
• Locking screw to fix the spring tension
• Three pressure springs available for a wide spring force range:

  Spring No. 1 silver 0 - 3 N (0 - 300 g) division: 10 g, Tolerance: ±0.34N
  Spring No. 2 red 0 - 10 N (0 - 1000 g) division: 50 g. Tolerance: ±1.03N
  Spring No. 3 blue 0 - 20 N (0 - 2000 g) division: 100 g, Tolerance: ±1.84N

• Needle made of tungsten carbide for long life