The Ethylene Sensing Pad is a smart label for monitoring fruit ripeness and freshness in retail and supply‑chain environments. It uses an ethylene‑responsive chemosensing ink to detect ethylene gas, a natural ripening hormone released by fruits. When ethylene levels rise, the pad changes from yellow to blue, indicating that fruits are moving from fresh to ripening/over‑ripe stages. This gives fruit retailers and distributors a simple colour‑based tool to decide when to promote, sell or remove stock, helping reduce fruit waste and improve customer experience.