Reference Block Type 1 (MTU - 3) Magnetic Particle Test Block Quick and easy verification and comparison of magnetic particle materials 
The MTU-3 Test Block is used to check the sensitivity of magnetic particle materials. This two sided block has a variety of indications ranging in size from small to large.

Use the MTU-3 to compare:

• fresh and used materials
• different brands of materials
• different types of materials (visible, dual sensitivity and fluorescent, etc.)
  
  Use the MTU-3 to verify:
• That aerosol cans are actually delivering particles

MTU-3 Blocks are prepared in accordance with the EN ISO 9934 – 2 : 2002.

• Natural cracks on both sides
• Can be used with fluorescent or visible particles
• Supplied with reference photograph

Steel Disc - 50 mm in diameter by 11 mm thick, with a 10.5 mm hole through the center.

International Standard Organization ISO 9934-2, Section B.1 Reference block type 1 - latest revision