Microcontroller-based instrument for measuring hydrogen sulfide with data logging system

Date

10-2005

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Nelio C. Altoveros

Abstract

microcontroller-based instrument for measuring hydrogen sulfide with data logging system was designed, calibrated and implemented. The instrument made use of a three-electrode electrochemical sensor, specifically, 4HS Citicel H2S sensor, which was calibrated by applying different gas concentrations and comparing the instrument's reading with the reading (in ppm) of a commercially available BW GasAlert H2S meter. The study has four main parts namely hardware design, software design, instrument calibration and instrument testing. An ATMEGA16L microcontroller was used as the main controller for data retrieval, collection, processing and display. The instrument was used to determine the level of hydrogen sulfide emission in Mudspring, Mt. Mak-fling, Laguna. With 0.7 ppm as the highest one-minute concentration average acquired from the three trials held at the said site, it was experimentally verified that the level of HIS concentration in Mudspring is below the 10ppm threshold limit set by the American Conference of Governmental Industrial Hygienists. Since the concentration was below the threshold limit, it was concluded that the H2S emission in Mudspring does not pose adverse health effects to humans.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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