The Glass-Chek PRO makes Glass Replacement Easy. With one push of a button, the Glass-Chek PRO tells you the exact replacement IG unit to order! The Glass-Chek PRO is suited perfectly for glass replacement, but it's perfect for many other applications as well. Whether you're installing or servicing in the field, spot checking in production, or inspecting a building, the Glass-Chek PRO simply gives you the answers you need. No guesswork - just simple results. The GC3001 measures glass, air space and overall IG thickness of single, double and triple pane windows - all at the single push of a button. The meter is also an advanced Low-E Detector that identifies the location and determines the type of Low-E Coating present in a window. When a coating is detected, the meter displays whether it is hard or soft coat low-E. When soft coat is detected, the meter classifies it as single, double, or triple silvered. This enables users to identify types of low-E coatings in the factory or in the field, and it's especially useful for glass replacement applications. When replacing glass, you must know the type of Low-E being used. Using the wrong coating can negatively affect the energy performance of a window. Additionally, the type of coating used on glass significantly effects the way a window reflects light. If you use a coating inconsistent with what is used throughout the rest of the building, the visual appearance will be affected, and the window could look significantly different than the other windows. The Glass-Chek PRO is the only tool that can tell you the precise coating needed to replace glass properly.