 This research proposes a prototype photometric device that can detect pesticides in the environment. It utilizes a color-programmable RGB LED light source and a TSL230R light frequency sensor to measure the presence of pesticides in the environment. The device is able to detect the presence of carbofurin, a banned pesticide, at concentrations as low as 6.3 nanomoles per liter. This prototype has the potential to be used as a large-scale screening system for pesticides in the environment. This article was authored by Andrei Karestes and Miroslav Pohenka.