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Aquarian Overview
Fossil Aquarian Water
Detection Products and Systems continue to set the standard whereby
all others are judged for accurate and reliable measurement of
Boiler Drum Water Level, Feedwater Heater Level and Alarming,
Drain-Pot Level and Alarming, and other applications pertaining
to water detection. They are an economical and reliable alternative
to float level switches.
Fossil's Aquarian products can no longer be purchased
through Yarway™. For almost two decades, Yarway™ Corporation
of Blue Bell, PA. had been granted exclusive worldwide marketing
and distribution rights for the Fossil designed and manufactured
Aquarian drum level product line. Due to changing business conditions
and ownership of Yarway™, the Aquarian product line is now
sold directly by Fossil and through certified
agents only.
The Water Detection Probe and associated verification
technique employed in the Aquarian water level detection system
operate via the following principles:
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Verification of the presence of water is
based on measuring the difference in resistance between
high purity water and steam. They form a resistivity cell,
which is then compared with a known reference resistor to
form a resistor divider network. A distinction is made between
steam and water by the Detection and Verification (D&V)
unit. The D&V unit measures the returning signal from
the probe enabling it to differentiate between "water"
and "steam" and output the appropriate indication.
Each probe has a dedicated D&V electronic circuit, ensuring
that a probe circuit failure is limited to the offending
probe, eliminating any affect on the overall operation of
the Aquarian.
Electroplating of the probe is prevented
by using a symmetrical source current wave.
System diagnostics perform an ongoing continuity
check of the wire to the probe. Optionally, two wires per
probe may be used to ensure the integrity of the connection
of the probes to the D&V.
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Key Features:
• All Aquarian probes are vacuum brazed
• Swagelok metal-to-metal seal of Aquarian
probe ensures leak proof installation in column
• Over 4,000 FST designed and built
Aquarian systems installed worldwide
• More than 60,000 Water Detection Probes
operating reliably in extreme environments
• Fossil stocks genuine Aquarian (OEM) replacement
parts at our manufacturing facility
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