PASCO CI-6532A PRESSURE SENSOR - ABSOLUTE User Manual
Page 4
Pressure Sensor - Absolute (0 to 700 kPa)
012-06859B
4
Suggested Experiments
Boyle’s Law (pressure vs. volume)
Boyle’s Law is a classic experiment in physics
(and chemistry) that can be demonstrated using the
sensor and the syringe. Set the syringe to a position
such as 15 cc. Connect the syringe to the pressure
port connector on the sensor. Take data as you
change the volume, beginning with a volume that
is greater than your beginning volume (e.g., move
the syringe to 20 cc). Continue to take data as you
decrease the volume to 15 cc and below.
Gay-Lussac’s Law (pressure vs absolute
temperature)
Gay-Lussac’s Law states that if the volume
remains constant, the pressure of a container of gas
is directly proportional to its absolute temperature.
Set up a sealed container of air by attaching the
longer piece of plastic tubing to a stopper in a 125
mL Erlenmeyer flask. Connect the other end of the
tube to the pressure port connector. Place the flask
in water baths of different temperatures. Record
data on how the pressure changes with the
temperature changes.
Pressure in Liquids
Put the end of the longer piece of tubing under
water. The pressure reading should increase by
0.0978 kPa (0.02896 in of mercury) per centimeter
of depth below the surface. You can also use a “J”
shaped tube to study how pressure relates to the
difference in heights of the liquid in the two parts
of the tube.
Studying Chemical Reactions by Monitoring
Pressure
Many chemical reactions produce gases that can
cause an increase in pressure in a sealed container.
The pressure change can be used to monitor the
rate of the reaction.
Other
PASCO scientific also produces a Differential
Pressure Sensor (Model CI-6533) and a Barometer
(Model CI-6531). The Differential Pressure Sensor
is similar to the CI-6532A, except that both ports
of the transducer are open to the atmosphere. It is
designed for experiments where pressure differs
from one part of the apparatus to another, such as
in a Venturi tube or for a demonstration of
Bernoulli’s principle. The Barometer has a range
from 800 to 1100 milliBar (24 to 32 inches of
mercury). It is designed to be a reliable, accurate
pressure sensor for weather studies. It is
temperature compensated and has a voltage
regulator, so changes in temperature or changes in
the computer’s power supply will not interfere with
the data.