Ring/Donut Probes

Ring/Donut, or encircling probes are made to fit various fastener head diameters. They are mainly used for subsurface crack detection with the fastener in place. They are available in both bridge and reflection configurations.

Advantages

• Ideal for subsurface defects.
• Inspection can be done with the fastener still in place.
• Various sizes available.
• Available with Powerlink™ technology.
• Available with bridge or reflection configuration.

• Internal reference coils ensure the best match to the test coil when using a Triax (Fischer™*) or Powerlink™ connector.
• Shielded coil for higher resolution.
• Detects cracks in all directions.
• Probe-type commonly used worldwide.
• Cost effective option.

Olympus absolute bridge type probes give a clean and strong signal as shown.

* All brands are trademarks or registered trademarks of their respective owners and third-party entities.

Reflection type probes

Also known as send-receive or driver-pickup probes

• Provides a similar response to the absolute bridge probe.
• Available with stacked or concentric driver and pickup coils.
• Enables crack detection in all directions.
• Withstands variations in temperature.
• Operates over a wide frequency range.

Olympus reflection absolute type probes give a clean and strong signal as shown.