The CM1030 detects any conductive surface, including Low-E coatings on single sheets of glass. Simply press the meter against a piece of glass to determine whether the surface you are touching contains any conductive (Low-E) coatings. The tester uses four (4) non-scratch pads on it's back side that prevent damage to coatings and provide a fast, easy test - ideal for the manufacturing environment. Please Note: The CM1030 works on single panes of glass only by directly contacting the test surface. Since Low-E Coatings are oriented on the inner pane of IG units, the CM1030 is not suitable for use on manufactured IG's.