In this project we will develop a prototype multi-sensor chemical * detector and measurement system for monitoring ammonia, carbon monoxide, total hydrocarbons, hydrogen chloride, and nitrogen oxides. * this project will incorporate commercially available solid-state sensors for the above mentioned gases into a microprocessor-based instrument that will be portable, have internal data logging capabilities and be able to give a real-time readout of the concentrations of the five pollutants. The sensors obtained and/or 4 developed during this project will be evaluated as to sensitivity, selectivity, response time, recovery time, linear range, reproducibility and lifetime. The instrument will have a keyboard by which the operator can input identification information, calibration constants, etc. And can request data out either through the system display or the data port interface. In addition to providing a real-time readout of the concentration of the various gases, we will also obtain "total dose', "average concentration', and "highest concentration".
