Our transportable model 3-200 fully heated FID is successfully used throughout international markets for over 30 years. Also among other portable gas FIDs, the 3-200 It is the first ever built transportable fully heated FID using our proprietary back purge sample filter. It is widely distributed throughout the industry and the stack testing community and is much liked for its ruggedness, high accuracy, sensitivity and stability. Our optional 50 liter low pressure metal hydride fuel storage can easily be mounted on the left side panel and allows a 45 hour minimum of uninterrupted operation. This fuel storage can be self-refilled at a low pressure of only 25 bar. No special adapter needed.