Directly contacting the low-E (conductive) coating will activate the red light on the detector providing positive identification of the coated side of the glass lite.
This detector identifies which pane of glass within the IG unit contains the low-E coating.
Your sales force should not be without this detector. Newer low-E coatings are clear in color and hard to identify in the field. Sales and installation personnel can easily identify which pane of glass has the low-E and assure the customer they have what they ordered.
Combining both the T.C.C. and the T.D.G. features, the D.I.G is two devices in one. This detector enables usage in the direct-contact style method and in locating which pane of glass has the low-E coating.