The t-mass 65F is a thermal mass flow measuring system. It is capable of direct measurement of the mass flow of gases. It is also able to provide temperature as an output. The Proline transmitter concept is composed of a modular device and operating system with high efficiency. It has an easy installation process and operating menus for easy commissioning and it is equipped with integrated software that enables a maximum selection of 20 gases and the formulation of mixed gases with 8 components maximum. The t-mass sensor has very minimal pressure loss or drop and has a wide turndown of 100:1. Each unit can be individually calibrated and purchased with a traceable certificate.