This is an automatic measuring instrument that enables you to perform automatic gauge block calibration. 

The Gauge Block Interferometer GBI offers you the following benefits: 

• It automatically measures the primary-level gauge block length determination for blocks between 0,1mm and 250mm using optical interference.
• The intensity and wavelength of the He-Ne laser light sources are highly stable, give you high accuracy measurement.
• Automatic remote measurement can be performed to reduce the effects of operator body heat.
• The GBI automatically detects the distribution of interference fringes and processes the data, eliminating human error.