PASCO PS-2222 General Flow Sensor - Manual (Page 2)

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M o d e l N o . P S - 2 2 2 2 P r o d u c t D e s c r i p t i o n
2
Product Description
The PS-2222 General Flow Sensor is a versatile device for measuring differential pressure in air or water. It mea-
sures the difference in pressure between the two input tubes.
The PASCO General Flow Sensor is designed to work with the ME-2220 Venturi Tube or the ME-2221 Pitot
Tube. The Venturi Tube and Pitot Tube attach to the General Flow Sensor by way of a flexible twin tube hose.
The connectors on the sensor are reversed from the connectors on the Venturi Tube and Pitot Tube so that they
cannot be attached incorrectly.
Using the PASCO data acquisition software, the user can select which device is attached to the sensor and what
fluid (air or water) is flowing through the device. Once these selections are made, the sensor provides the pres-
sure and the calculated values for flow velocity or volumetric flow (assuming standard temperature and pres-
sure). The units of measure are selectable as metric or non-metric.
Venturi Tube (ME-2220)
The General Flow Sensor
measures the fluid pressure in
two areas of different diame-
ter and calculates the speed
from the difference in pres-
sure.
The Venturi Tube is designed
to be used with standard 3/4
inch (1.91 cm) diameter poly-
vinyl chloride (PVC) pipe.
The inlet cross-sectional area
of the Venturi Tube is
3.44 x 10
-4
m
2
(3.44 cm
2
) and the throat cross sectional area is 1.24 x 10
-4
m
2
(1.24 cm
2
).
The plastic used in the Venturi Tube is compatible with standard PVC glues and it is recommended that it be
glued into a piping network to measure flow rates. Alternatively, the Venturi Tube may be temporarily placed in
a piping network using tape. The hose length is three feet (0.91 m).
ME-2220 Venturi Tube
Hose Length is 3
feet (0.91 m)
Inlet area = 3.44 x 10 -4 m 2
Throat area = 1.24 x 10 -4 m 2
Flow Direction
Low Pressure
Tube
High Pressure
Tube
Slip Joint
Slip Joint