Portable PC-based measurement of carbon monoxide (CO) using TGS 2442 sensor

Date

3-2004

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Lillian I. C. M. Selarde

Abstract

A portable microcomputer-based instrument for measuring carbon monoxide concentration was designed and implemented using TGS 2442 electrochemical carbon monoxide sensor. A chip called: FIC 0046 was used in order to meet the pulsing requirement of the sensor. A signal conditioning circuit was fabricated to convert the modulating output of the sensor into an analog signal. The instrument was interfaced to the computer via a PC serial port or RS-232 poll using a 12-hit analog to digital converter integrated chip. A software program was developed using Visual Basic 6.0 programming language for automated real-time data collection. A working equation provided by the sensor's manufacturer was used to convert the output voltage sensor to its equivalent CO gas concentration. Carbon monoxide in automobile exhausts was measured by placing the instrument at two points, 50 cm and 100 cm, away from the tail pipe of the vehicle. Results showed that the level of CO concentration increased as the level of smoke emission increases at the 50 cm point. But a minimal change of CO level concentration was observed when measurement was taken 100cm away from the level of the tailpipe.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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