GE Panametrics DigitalFlow - ISX878

Intrinsically Safe, Low Voltage, Ultrasonic Liquid Flow Transmitter

Starting at $1,500.00

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Intrinsically Safe

The Digital Flow ISX878 provides a low cost solution for non-intrusive liquid flow measurement in your hazardous locations. The Digital Flow ISX878 is able to achieve an intrinsically safe rating by significantly reducing the amount of energy required to drive the ultrasonic transducers. Reducing the drive voltage by a factor of 10 could only be made possible through advancements in the ultrasonic transducers. The new ISXDR transducers are considerably more efficient than our previous piezoelectric models that led the market over the past two decades.

Lower Cost of Ownership

Intrinsic safety reduces installation costs by eliminating the need for heavy explosion-proof junction boxes and conduit. The reduced power usage also allows the Digital Flow ISX878 to be a loop-powered device, which saves on installation costs. This becomes more important where hazardous locations have significantly higher costs for running power cables for an AC or DC unit. The Digital Flow ISX878 uses an available twisted pair of instrument cables, fed through a safety barrier, to power the unit. Since the meter clamps onto the outside of the pipe, there is no need to shut down a line to install the meter or to service it. The robust electronics and transducers have no moving parts to break or wear down, so annual maintenance can be significantly reduced, if not entirely eliminated.

Two-Path Model

An optional second channel provides the capability to obtain two-path averaging of the flow measurement, at a single point for increased accuracy.

Uses the Transit-Time Flow Measurement Technique

The Correlation Transit-Time™ technique uses a pair of transducers with each transducer sending and receiving coded ultrasonic signals through the fluid. When the fluid is flowing, signal transit-time in the downstream direction is shorter than in the upstream direction; the difference between these transit-times is proportional to the flow velocity. The Digital Flow ISX878 measures the time difference and uses programmed pipe parameters to determine flow rate and direction.