Thermal imaging is widely utilized in agricultural applications such as examining plant
physiology, yield prediction, irrigation scheduling, bruises and pathogen determination in
fruits and vegetables. There is a need for a cost effective thermal device for this wide range
of applications. In this study, a low-cost prototype thermal device was used to measure the
temperature of FFBs at three maturity levels, that are under-ripe, ripe and over-ripe. The
experiment was repeated using a commercial thermal camera. Then, the mean temperature
obtained from both the prototype and commercial thermal sensors was compared. Our results
showed the prototype thermal device is capable of estimating the mean temperature of oil palm
FFBs with the values analogous to the mean temperature from commercial thermal camera
with R2 = 0.71.