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pH-mätare med ISFET-givare
Bengtsson, Mårten
Halmstad University, School of Business and Engineering (SET).
Brunkstedt, Dan
Halmstad University, School of Business and Engineering (SET).
1999 (Swedish)
Independent thesis Basic level (degree of Bachelor)
Student thesis
Abstract [sv]
This project contains of building a pH-meter. The probe is made of an ISFET-sensor, from Sentron. ISFET is an abbreviation for, Ion Sensitive Field Effect Transistor. The ISFET-sensor operates similar to a MOS-transistor. The main difference between the two, is that the metal-film on the gate of the MOS-transistor is removed. The gate will now work as a window towards hydrogene-ions. Since pH depends on the concentration of hydrgene-ions, a pH-sensor now is made. To make the the sensor more sensitive towards hydrogene-ions the gate is coated with a hydrogene-selective-material. In the main construction a microprocessor, PIC16C74A is used for calculations, and as a control unit. Examples of things that are controlled by the processor are AD-conversion, LCD-display and a built in memory function. The memory function is meant to be used for saving pH-values during a laboration. The PIC16C74A is programmed with development tools from MicroChip.
Place, publisher, year, edition, pages
1999.
Keywords [sv]
ISFET, SENSORS, PH, PIC, SEMICONDUKTORS
Identifiers
URN:
urn:nbn:se:hh:diva-8268
Local ID: U2224
OAI: oai:DiVA.org:hh-8268
DiVA, id:
diva2:363353
Uppsok
Technology
Note
Denna uppsats kan beställas från arkivet / This paper can be ordered from the archive. Kontakta / Contact: arkivet@hh.se
Available from:
2010-11-09
Created:
2010-11-09
Bibliographically approved
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modern-language-association-8th-edition
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