Do's And Don'ts; How Pressure/Level Sensors Work - Seametrics LevelSCOUT Instructions Manual

GENERAL INFORMATION

Do's and Don'ts

Do handle the device with care.
Do store the device in a dry, inside
area when not in use.
Do install the device so that the
cable connector is kept dry.

How Pressure/Level Sensors Work

Liquids and gasses do not retain a fixed shape. Both have the ability to flow and are often
referred to as fluids.
pressure in all directions at a given level. Further, this pressure increases with an increasing
depth of "submergence". If the density of a fluid remains constant (noncompressible...a
generally good assumption for water at "normal" pressures and temperatures), this
pressure increases linearly with the depth of "submergence".
We are all "submerged" in the atmosphere. As we increase our elevation, the pressure
exerted on our bodies decreases as there is less of this fluid above us. It should be noted
that atmospheric pressure at a given level does vary with changes in the weather. One
standard atmosphere (pressure at sea level at 20º C) is defined to be 14.7 PSI (pounds per
square inch).
There are several methods to reference a pressure measurement. Absolute pressure is
measured with respect to an ideal vacuum (no pressure).
common way we express pressure in every day life and is the pressure exerted over and
above atmospheric pressure.
as the difference between the absolute pressure (Pa) and atmospheric pressure (Patm):
Pg = Pa - Patm.
The LevelSCOUT is an absolute sensor and will require an outside barometric reference
to obtain "gauge" type readings.
Seametrics • 253.872.0284
One fundamental law for a fluid is that the fluid exerts an equal
With this in mind, gauge pressure (Pg) can be expressed
Don't support the device with the connector.
Use a strain relief device to take the
tension off the connectors.
Don't allow the device to free-fall down a well
as impact damage can occur.
Don't bang or drop the device on hard
objects.
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LEVELSCOUT INSTR
Gauge pressure is the most
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