The Aalborg TIO Totalizer converts analog mass flow meters and controllers into precision digital units via RS 232 or RS 485 interfaces (multi-drop capacity up to 64 devices). It can be used as a monitor for Aalborg GFM and AFM flow meters or as a controller with GFCs and AFCs; it can also be used with any third-party devices with 0-5VDC/4 20mA inputs and outputs. The unit has 2 programmable, optically isolated digital outputs and a user-programmable optically isolated pulse output with preset active, low time interval. It displays instantaneous, total and accumulated flow rates. No host PC is required for local or programmable set point control.