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pH-mätare med ISFET-givare
Halmstad University, School of Business and Engineering (SET).
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.
Keyword [sv]
ISFET, SENSORS, PH, PIC, SEMICONDUKTORS
Identifiers
URN: urn:nbn:se:hh:diva-8268Local ID: U2224OAI: oai:DiVA.org:hh-8268DiVA, id: diva2:363353
Uppsok
Technology
Note
Denna uppsats kan beställas från arkivet / This paper can be ordered from the archive. Kontakta / Contact: arkivet@hh.seAvailable from: 2010-11-09 Created: 2010-11-09Bibliographically approved

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