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Float based gauge system for basic applications. |
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Patented microprocessor based digital system
measures fluid level with 1/4" accuracy in
tanks up to 32 feet high. |
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System is self powered with 5 year lithium batteries,
allowing stand alone operation with no external power.
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316 stainless steel sender bar and polyethylene
float resist corrosion, optional PVC sheath for the
sender bar is available for acid applications.
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LCD display for easy daytime viewing with a back light
for night viewing.
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System can be factory or field calibrated for any
desired display units, such as barrels, gallons, or
inches of level.
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High reliability design has no moving parts except for
the float.
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Built-in overfill warning alarm can activate a horn
or light.
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Installation and servicing is simplified by modular
design, fibre optic connection between sender bar and
display, no external power requirements, and extensive
diagnostic tools.
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Operation from -45 to +60 oC ambient
temperature, -45 to +85 oC product
temperature.
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One year limited warranty.
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Maximum tank height:
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25 feet (7.6 m).
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Principle of operation:
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Reed switches in sender bar are activated by magnets
in the float, and are read by a microprocessor. Signal
from the sender bar is transmitted to the display
through plastic fibre optic cable.
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Resolution:
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1/4 inch (6 mm).
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Accuracy:
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+/- 1/8 inch (3 mm).
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Specific gravity sensitivity:
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Float sinks one inch (25 mm) in water.
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Hysteresis:
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1/16 inch (1.5 mm) (Difference between reading with
float rising and reading with float falling.
Eliminates display flicker.)
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Maximum fibre optic length:
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200 feet (60 m). Fibre can be cut with a knife.
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Ambient temperature range:
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-45 to +60 oC, product temperature range is
-45 to +85 oC.
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Battery lifetime:
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5 continuous operation for sender bar and 10 years on
display. Sender battery can be easily replaced in the
field.
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Display type:
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5 digit numerical, 0.50 inch LCD can be programmed to
display level or volume.
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Display temperature drift:
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0
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Alarms:
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One alarm consisting of a MOSFET transistor conducting
to ground when the alarm is "on". The
transistor has a rating of 1 Amp at 30 volts DC.
Alarm defaults to "off" if the signal from
the sender bar is corrupted or lost. A second,
self resetting alarm output is available for an
overfill warning.
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Alarm temperature drift:
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0
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Power requirements:
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Display/Sender Bar: None for basic operation.
Display backlight requires 12 volts DC.
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Display enclosure:
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Valox enclosure, 4 inches in diameter.
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Float construction:
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Cylindrical, approximately 7.25 inches diameter by 4.5
inches high. Float material is polyethylene.
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Bar construction:
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One inch diameter 316 stainless steel tube houses reed
switches and temperature sensors. Optional PVC sheath
for bar permits operation in strong acids.
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Fitting requirements:
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Sender bar is held in place at the top with a one inch
compression fitting, requires a one inch female NPT
thread in the tank top. At tank bottom either a
weighted anchor or a weld in anchor can be used.
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Diagnostics:
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Display shows if signal from sender bar is corrupted
or lost. 916 programmer can measure optical signal
level, sender integrity, display integrity, and can
exercise the alarm points.
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