Novel and unique properties of materials are considered to determine suitable sensing materials. Because of interesting naturally-based characteristics, biopolymers including cellulose, nanocrystalline cellulose and chitosan have been actively investigated in the last decades. Colorimetric, electrochemiluminescence, fluorescence and surface Plasmon resonance are the list of optical sensors. Ammonia gas sensors can be analyzed using techniques like electronics, electrochemistry, tunable diode laser spectroscopy, surface acoustic wave, and field effect transistors. Optical ammonia sensing of a biopolymer can be performed using surface Plasmon resonance (SPR) with a response time of 2-3 seconds and a detection limit of 1 ppm at room temperature. Furthermore, Optical sensing films using organically modified silicates (ORMOSILSs) can detect ammonia with a detection limit of 0.01± g/ml and a response time of 2 minutes. Cellulose acetate membranes with cellulose acetate-proline ionic liquid display the best ammonia sensing with a detection value of 1 ppm and response and recovery times of 60 and 78 seconds respectively.