Levelpro sensors are provided in distance measurement ranges i.e. 0-14 ft, 0-20 ft, 0-33 ft etc. To calculate the maximum range or the
liquid that a particular sensor will measure, use the following formula:
Example : 0-14 ft transmitter installed in a liquid with a maximum height of 12 feet and a SG=0.9 will have a Sensor Height with a
range 0-14' = 14 feet /0.9 = 15.5'…so it can measure more liquid than the 14' range due to the SG being below 1 (H
20
water)
Example : Compare the Maximum Liquid Height of a liquid with a SG = 1.5.
SG = 1.5 : 0-20' Range transmitter will have a Maximum Sensing Height (Liquid) = 20/1.5 = 15 ft
SG = 1.0 : 0-20' Range transmitter will have a Maximum Sensing Height (Liquid) = 20/1 =20 ft
When the Specific Gravity is less than 1.0, the Maximum Liquid Height of the transmitter will increase. The reverse is true by increasing
the Specific Gravity. With a SG = 1.5, the Maximum Sensing Height (Liquid) = 15' with a Transmitter with a Range of 0-20 ft
Transmitter
Note : Identifying the correct specific gravity for the fluid is critical in understanding the operational range of the pressure transmitter.
Maximum Liquid Height (feet) = Maximum Liquid Height of Liquid / SG
This method works with the Levelpro Series level displays & controllers. These panel meters are configured using the linear SCALE
function. The settings are as follows:
GETTING STARTED (Continued)
Settings Default Represents Typical Setting
Input 1= Empty
4.0
Input Current @ Empty
4.0mA
Input 2 = Full
20.0
Input Current @ Full
20.0mA
How to configure a panel meter when a pressure transmitter is used?
Remember, pressure transmitters are configured so 0 psi/ft = 4 mA and the maximum psi/ft = 20 mA. Levelpro pressure transmitter
applications will not use the full range of the transmitter. Therefore, a full tank will typically have a current less than 20 mA.
Note: The values for empty and full represent what the display will show when the tank is either Empty or Full. Empty and Full
must be the same units (example: Gallons, Inches, percent).
9. INSTALLATION
The Levelpro Series is designed to operate while submerged in the actual application liquid. Avoid
installing the level transmitter along the bottom of the tank if materials such as sludge will build up
and coat/cover the transmitter. This also includes any debris that will settle along the bottom of the
tank. In these applications, it is best to suspend the transmitter above the highest level of
sludge/debris that will occur.
Location : Select a location where the temperature of the transmitter will be within the
specification of the sensor.
Position : The transmitter is not position sensitive.
Mounting : The transmitter can be mounted via several methods. It can be suspended
from the cable, it can be placed resting on the bottom of the tank in either horizontal or
vertical orientation, or it can be attached to a pipe or hardwired using the LP100 conduit
box on the top of the housing.
1.
2.
3.
SLUDGE
Continuous Submersible Level Transmitter
Levelpro-Sensors Manual
08
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