User's Manual

Model No. ME-6940 About the Membrane
2
The ME-6940 Diffusion-Osmosis Apparatus is patent pending.
*The ME-6942 Diffusion-Osmosis Kit includes the Diffusion-Osmosis Apparatus and the PASPORT Dual Pressure
Sensor.
The PASPORT sensors work with a PASPORT interface such as the ones listed below. The CI-6561 Carbon Dioxide
Oxygen Gas Sensor and CI-6562 Oxygen Gas Sensor work with a ScienceWorkshop interface or can work with a
PASPORT interface when connected to a PS-2158 Analog Adapter..
See the PASCO catalog or the PASCO web site at www.pasco.com for more information about PASCO sensors and
interfaces.
About the Membrane
• The Diffusion/Osmosis membrane is a regenerated cellulose membrane preserved in glycerol.
• In order to conserve moisture, membranes should be stored in an airtight, moisture-proof container in a cool
location. If the membranes are not stored correctly, they can dry out, lose flexibility and develop microscopic
holes that will alter expected experimental results.
• Tension on the membrane in one direction can reduce pore size slightly. Tension on the membrane in both
directions can increase pore size slightly.
• Membranes can be reused if the wetted membranes are stored in either acid or formaldehyde. Be sure to soak
and rinse again.
Sensor Model
PASPORT Dual Pressure Sensor PS-2181
Optional Sensors Model
PASPORT Carbon Dioxide Gas Sensor PS-2110
Carbon Dioxide Gas Sensor CI-6561
PASPORT Oxygen Gas Sensor PS-2126
Oxygen Gas Sensor CI-6562
Other Model
Replacement Membranes (20) ME-6941
Diffusion-Osmosis Kit* ME-6942
PASPORT Interface Model ScienceWorkshop Interface Model
Xplorer GLX PS-2002 ScienceWorkshop 750 CI-7650
Xplorer PS-2000 ScienceWorkshop 500 CI-6400
PowerLink PS-2001
USB Link PS-2100 Other Model
SPARK Science Learning System PS-2008 PASPORT Analog Adapter PS-2158
SPARKlink PS-2009