Goniometer (Rame-Hart A-100) - Operating Procedure

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System Illustration

labeled photo of the contact angle goniometer
The Ramé-Hart A-100 Contact Angle Goniometer and relevant adjustment knobs.

Measurement Procedure

To measure the contact angle of water on a surface, perform the following procedure.

  • Note that the image through the scope is inverted upside-down.
  • You will also see a reflection of the water droplet on your polished substrates, as illustrated here:
Illustration of a reflective sample.
Illustration of a reflective sample. Substrate is on top due to inverted image.

Goniometer (Rame-Hart A-100) - Steps for Measuring v1.png