Abstract:
Following the importance of pH in many fields especially in medicine,
chemistry, and many other fields. The pH measurement is considered as one of the
most popular lab.measurements. pH measurement of the blood is done by a device
called blood gas analyser which is special for blood only. So we realized the necessity
of this project as a measurement of the pH for any solution in general. Thus we design
vi
this project as a computerized device and easy to use. And the most thing effect the
pH measurement is the temperature then we will measure it through this device.
Briefly we will explain the way that how this device works. We have two
sensors the first is the temperature sensor and the second is the pH sensor. Small
electrical signal measure with mV is entered through a temperature sensor, and
another small electrical signal measure with mV is entered through a pH sensor (this
signal is produced through series of chemical reactions that generate the voltage),
these two electrical signals enter into amplifier to amplify it, then into analog to
digital converter (ADC) in order to be dialed with the computer and which through
matlab program that stores the results of the pH and temperature and then appear on
the computer screen.
