Instruction Sheet
PS-2222 General
Flow Sensor
Low Pressure
Tube
High Pressure
Tube
Luer Barb,
Male
Luer Plug,
Female
Threaded Hole
(1/4”-20)
General Flow Sensor
PS-2222
012-12917A
Included Included
General Flow Sensor (PS-2222) PASPORT Sensor Extension Cable (PS-2500)
Required Items* Information*
PASCO Interface see www.pasco.com
PASCO Data Acquisition Software see www.pasco.com
*See the PASCO catalog or the PASCO web site at www.pasco.com for more information.
Accessories used with the sensor Accessories used with the sensor
ME-2220 Venturi Tube ME-2221 Pitot Tube
Other Other
ME-2224 Pressure Tap CI-9874 Sensor Handles (4 Pack)
Model No.PS-2222 Product Description
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
Product Description
The PS-2222 General Flow Sensor is a versatile device for measuring differential pressure in air or water. It measures 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 pressure and the calculated values for flow velocity or volumetric flow (assuming standard temperature and pressure). 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 diameter and calculates the speed
from the difference in pressure.
The Venturi Tube is designed
to be used with standard 3/4
inch (1.91 cm) diameter polyvinyl chloride (PVC) pipe.
The inlet cross-sectional area
of the Venturi Tube is
3.44 x 10
-4 m2
(3.44 cm2) and the throat cross sectional area is 1.24 x 10-4 m2 (1.24 cm2).
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).
2
Model No.PS-2222 Product Description
ME-2221 Pitot Tube
Handle
Low Pressure
Tube
Flow
Direction
Fluid
Inlet
Static Taps (evenly spaced
around circumference)
Overall hose length
is 6 feet (1.82 m)
Luer Plug, Male
Stagnation
Point
P
1
2
-- -
V
2
=
Static Taps
To Sensor
Sensor
PASPORT
Input Port
Interface
• SETUP: For more information on setting up the softwar e and recording dat a, refer to the end of
this document or the User’s Guide and online help for the data acquisition software.
Pitot Tube (ME-2221)
The Pitot Tube is designed to measure flow velocity in open channels. The Pitot Tube has a detachable handle attached to a 1/4”-20 nut.The overall
hose length is 6 feet (1.82 m). The tube with the
male luer plug is for low pressure measurement and
the other tube is for high pressure measurement.
High Pressure
Tube
Quick Start
• Plug the General Flow Sensor into one of the PASPORT
input ports of a PASCO interface (such as the 850 Universal
Interface, Xplorer GLX, or SPARK Science Learning System). Or, connect the sensor to the PASPORT Sensor Extension Cable and then connect the cable to an input port.
• Connect an accessory such as the ME-2220 Venturi Tube or
the ME-2221 Pitot Tube to the General Flow Sensor.
• Start the PASCO data acquisition softw are (such as PASCO
Capstone). Select the type of fluid (air or water). Set up a data display in the software.
• Click “Record” , press the button on the GLX, or touch ‘Start’ to begin reco rding
data.
Specifications
The pressure sensing element used in this sensor will provide accuracy of ±2.5% of the full scale reading (50
kilopascal) at temperatures between 0 and 85 degrees C. This implies accuracy within ±1.25 kPa. Better accuracy
may be attained by doing a calibration of the sensor at the temperature of use and maintaining the sensor in a stable position.
3