15
Section 8
Measuring Flow Rate
The voltage output by the 800 Series metering flow switches allows the flow rate of the liquid passing
through the device to be estimated.
While the flow response curves of the 800 Series metering flow switches are extremely linear, they do
NOT pass through zero, requiring the use of a linear regression formula or calibration graphs to derive the
actual flow rate from the measured output voltage.
Calibration curves and derived look-up tables obtained from measurement of multiple sensors are shown
below.
The equations under each graph may be used with PLC or other control devices to obtain a more
accurate measure of flow.
Section 9
Digital Displays
Digital display units
Digital panel display meters are available to provide a direct local display of flow rate in selected
engineering units. Each unit has a 3½ digit LCD display with 0.6-inch high digits and a DIP switch-
selectable decimal point. The digital display unit requires 4 mA at 9 to 28VDC.
Flow Range
– GPM
Part Number
Flow Range - LPM
Part Number
0.05
– 0.3
0G804D03
0.2
– 1.2
0L804D1
0.2
– 2.0
0G804D2
0.6
– 7.6
0L804D7
0.3
– 4.5
0G804D4
1.2
– 17
0L804D17
0.8
– 10
0G806D10
3
– 38
0L806D38
1.0
– 15
0G808D15
4
– 56
0L808D56
1.3
– 19
0G812D19
5
– 72
0L812D72
3
– 50
0G816D50
11
– 190
0L816D190
Table 3: Part Numbers and flow ranges for Digital Displays for the 800 Series
Note
Switches and potentiometers have been set to fit the range of your devices.
Changing these settings may invalidate the calibration!
Connecting the Digital Display Unit
