Suitable for applications monitoring natural gas, air, and digester gas, Model FT1 utilizes DDC-Sensor™ consisting of direct digitally controlled sensor technology for calculating accurate gas correlations. Correlation algorithms allow meter to be calibrated on single gas in factory while providing user ability to select other gases in Gas-SelectX™ gas menu. With Zero CAL-CHECK™ feature, users can confirm that meter is functioning properly and accurately with push of button.