Merlin Lazer Low E Glass Coating DetectorThe Merlin Low E Coating Detector is a dual purpose tester designed to detect Pilkington K Glass and all other Low Emissivity coatings on single and double glazed units and indicate on which surface it is present. Low E glass is a vital component of energy efficient windows. It has a virtually invisible coating which the tool is designed to detect. The Merlin Low E Coating Detector is a dual purpose tester designed to detect Pilkington K Glass and all