Flo-Box 954 Sierra Instruments Multi-Channel Digital Mass Flow System

The Sierra Instruments Flo-Box 951 / 954 Digital Mass Flow Electronics and Power Supply include a compact, single channel device for operation of one mass flow meter or controller and a deluxe, multi-channel device for operation of up to four devices. Designed specifically for use with the Sierra Model 830 flow meters and Model 840 flow controllers, both of these powerful digital systems supply power (± 15 VDC), display the flow rate, and offer set point control for MFCs.

The Model 951 is an ultra-compact digital device that is designed to operate a single unit. In addition to power, readout and set point, it offers multiple alarm points and can be easily calibrated in the field to operate both new and existing devices. It is designed for easy panel mounting (1/8 DIN).

The Model 954 is a state-of-the-art digital system that can operate up to four units. In addition to power, readout and set point, it offers front-panel override for valve shut and purge functions for MFCs, user programmable K-factors for different gases, engineering units, alarms, independent totalizer for all four channels, master slave ratio control and multiple alarms. It also offers both RS-232 and RS-485 communication via rear-mounted serial ports. The Model 954 is designed for easy panel mounting (1/2 rack).