Abstract: This paper documents the creation of a complete PC-Based humidity sensing system, implemented using Lab-VIEW from National Instruments. A novel humidity sensor has been manufactured by thin film technology from a combination of In2O3/SiO. Both the humidity sensor and a standard temperature sensor are interfaced to a PC using a front-end signal conditioning circuit. The entire system has been analyzed mathematically and the necessary algorithms for error-compensation have been developed. The resulting measurement system is efficient, accurate and flexible.
Key words: Measurement system, PC based system, humidity sensor, temperature sensor, error compensation, thin film technology.