The Smart-Trak 2 (photo) is a significant redesign of this firm’s flagship Series 100 Digital Mass Flow Meters and Controllers. Among the expanded functionality of Smart-Trak 2 is true linear performance, which provides high accuracy and great flexibility in multiple gases. With Dial-A-Gas Technology, users select from up to ten pre-programmed gases, or substitute their own. Smart-Trak 2 also provides the ability to adjust calibration in the field for each of these ten gases independently. It provides the most advanced linear sensor available, smoother valve performance, more robust electronics and more control over a wide range of functions, according to the firm. The Compod, has also been introduced as a Smart-Trak 2 add-on, which expands networking, streamlines and simplifies functionality, and reduces costs. — Sierra Instruments, Monterey, Calif.