GE Sensing ISX878 Data sheet

GE

Sensing

Applications

DigitalFlow

™

ISX878

Panametrics Liquid Flow
Ultrasonic Transmitter

DigitalFlow ISX878 is a Panametrics
product. Panametrics has joined
other GE high-technology sensing
businesses under a new name

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GE Industrial, Sensing.

The DigitalFlow ISX878 is an intrinsically safe,
loop-powered, full-featured clamp-on ultrasonic flow
transmitter system for flow measurement of:

• Hydrocarbon liquids

• Petroleum products

• Lubricating oils

• Diesel fuel oil

• Chemicals

• Other liquids

Features

• Intrinsically safe

• Loop-powered

• Low power consumption

• Suitable for pipe sizes from 1/2 in to 16 in
(15 mm to 400 mm) diameter

• Six button keypad

• Large integral display

• Simple meter and transducer installation and setup

• Velocity, volumetric and totalized flow

• Economical non-intrusive flow measurement

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GE

Sensing

The DigitalFLow ISX878 ultrasonic flow transmitter
combines the simplicity of a loop-powered meter
installation with proven, advanced clamp-on ultrasonic
flow transmitter technology. It provides customers with
an economical solution for flow measurement in pipes
up to 16 in (400 mm).

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 DigitalFlow ISX878 measures the time
difference and uses programmed pipe parameters to
determine flow rate and direction.

Flowmeter Transducers

Fluid
Flow

Ultrasonic Signal Path

Transit-time flow measurement technique

Intrinsically Safe

The DigitalFlow ISX878 provides a low cost solution for
non-intrusive liquid flow measurement in your hazardous
locations. The DigitalFlow 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.

CPT ISXDR

Small pipe transducers for 1/2 in to 4 in pipes

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

DigitalFlow 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
DigitalFlow 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.

Voltage