Transmittance optimization for high sensitivity ozone concentration measurement

In ultraviolet absorption spectroscopy, sensitivity of ozone concentration measurement is low when transmittance is too high or too low. This is because transmittance of light influences sensitivity of measurement. Here, we derive a new equation based on Beer-Lambert law to determine sensitivity of sensor. The proposed equation is applied to optimize transmittance for high sensitivity ozone concentration measurement. The proposed equation is validated by comparison to Twyman-Lothian equation, theoretical calculation, spectralcalc.com simulation and experiment. Simulation and experimental results show high sensitivity of measurement when ozone is sampled at optimum transmittance. (c) 2016 Elsevier B.V. All rights reserved.