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The Model FS10A analyser flow switch/monitor from Fluid Components International (FCI), targeted at process and plant engineers, can be incorporated into gas and liquid process sampling systems.

The instrument features an SP76 adapter that supports New Sampling/Sensor Initiative (Nessi)-compliant hardware.

The SP76 adapter for Nessi modular manifolds allows the FS10A to be installed into a standardised mechanical platform for analysers and sensors.

In Nessi-compliant devices, sample system components such as the FS10A can be mounted onto a standard fluidic interface for modular surface-mount components that features standard wiring and communications interfaces and a standard platform for micro-analytics.

The FS10A conforms to Nessi Generation I and is prepped for Generation II and III compliance.

It requires only a single 1.5 x 1.5in (3.8 x 3.8cm) SP76 base.

The FS10A analyser flow switch/monitor is low-cost solution for continuously verifying flows within liquid or gas process analyser sampling systems.

It is a small, lightweight instrument featuring low flow sensitivity, a choice of electronic outputs and a no-moving-parts design.

Analyser end users and system integrators will find that the FS10A’s advanced electronics and thermal dispersion flow sensing technology provide an excellent overall solution to sampling system flow assurance, according to FCI.

It is suitable for the continuous monitoring of analyser sample flows to provide a high-integrity process analysis without interruption.

Featuring a precision flow sensor element with no moving parts to foul, clog or maintain, the FS10A ensures continuous reliability and requires virtually no maintenance.

Unlike capillary bypass flowmeters and controllers, the FS10A has no cavities, orifices or dead legs that trap fluids and lead to contaminated samples, thus preserving sample integrity and providing faster system sampling times.

The instrument’s wetted parts are made of corrosion-resistant 316L stainless steel with Hastelloy-C sensor tips.

The FS10A analyser flow switch/monitor can be used with nearly all types of process and emissions sampling systems, including gas chromatographs (GCs), mass spectrometers, optical spectrometers and photometers.

The analyser flow switch fits in a standard 0.25in tube tee as well as the SP76 adapter.

Operating over a wide flow range in multiple configurations, the FS10A features a flow range in air from 0.1scfh to 40scfh (50cc/min to 20,000cc/min) and a flow range in water from 0.001gpm to 0.03gpm (4cc/min to 100cc/min).

It accommodates wide turndowns with a ratio up to 100:1.

A single model can be used for most gas and liquid applications with a simple in-field setup.

The FS10A is designed with a sealed aluminium housing to protect electronics in harsh plant environments.

The electronics can be integrally mounted with the sensor element in a uni-body configuration or remotely mounted for front-panel display viewing.

The FS10A features a top-mounted, 10-LED array and two pressure-sensitive-button touch controls.

The LED display shows flow-rate trend, alarm status and power on/off.

The flow switch’s setup and set-point values can be changed via the two pushbuttons or via its standard RS232C serial interface.

The FS10A is available with a choice of electronic outputs.

The switch output can be either an open collector (transistor) or a 1A relay settable for NO or NC operation.

The switch settings are user programmable for the trip control of hysteresis and time delay.

An optional 4-20mA output is available for trending, which is field-settable to represent the flow-rate span.

The FS10A features multiple agency approvals, including: FM and FMc Nonincendive, Class I, Division 2, Groups A, B, C and D; Class II, Division 2, Groups E, F and G; and Class III T4@Ta=71C Type 4X.

It has also been submitted for Atex and IEC; these approvals are pending.

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