CS451/CS456 Submersible Pressure Transducer
5
state between measurements. A series of measurements are performed yielding
a temperature and pressure value. This measurement cycle takes less than 1.5 s.
The transducer can also be configured to output pressure only in less than 1 s.
The measurement cycle is activated using SDI-12 or RS-232 commands.
The transducer consists of a piezoresistive sensor housed in a 316L stainless-
steel (CS451) or titanium (CS456) package to enhance reliability. The rugged
construction makes the CS451/CS456 suitable for water level measurement in
irrigation applications, water wells, lakes, streams, and tanks. The titanium
package of the CS456 makes it ideal for salt water or other harsh environments.
The cable incorporates a vent tube to compensate for atmospheric pressure
fluctuations and the jacket is made of rugged Hytrel®, designed to remain
flexible and tough, even under harsh environmental conditions.
The CS451/CS456 has two communication options: SDI-12 and RS-232. The
CS451/CS456 is shipped from the factory with both communications options
enabled. As an SDI-12 sensor, the CS451/CS456 is shipped with an address of 0.
Two values are output by the CS451/CS456—pressure/level and temperature.
By default, the sensor outputs pressure in pounds per square inch ga
u
ge (psig),
which is the pressure relative to atmospheric pressure. By default, the sensor
outputs temperature in degrees Celsius.
The CS451/CS456 has three nose cone options. FIGURE
cone options. The weighted nose cone makes the transducer easier to submerge
to depth. The 1/4-inch NPT nose cone allows the transducer to be used in
closed-pipe applications. Nose cones can be switched out later. The nose cones
are available separately from Campbell Scientific, allowing the nose cone to be
changed to a different style at a later date, if desired.
FIGURE 5-1. CS451 nose cone options
Weighted Nose Cone
Standard Nose Cone
1/4 inch NPT Nose Cone