CRL Low-E Glass Detector - AE1600
The CRL Low-E Glass Detector senses the presence (or absence) and location of thermally resistant coatings used on single strength and double strength energy efficient glass (maximum air space of 1/2 inch (12.7 millimeters). This helps to ensure windows are manufactured correctly. Simple indicator lights check clear, near, or far surfaces. One 9 Volt battery is included.