Pairing a GD40G/GD402G gas density detector with the gas density analyzer. The detector and analyzer are paired from the factory via constants set in the analyzer. This video shows you how to set the constants from another detector in your analyzer. While we strive to provide the safest and most accurate information possible, we are not responsible for any loss or damages resulting from attempting to replicate the acts conducted in this video. Furthermore, we shall not be held liable for use or misuse of information contained in this video.