This paper describes a low-cost fluorometer to detect and distinguish among different types of crude and refined oil. The device is based on the measurement of induced fluorescence using 280 and 390 nm LEDs as excitation sources and the design includes a low-cost lock-in amplifier to increase sensitivity. The sensor is able to send data remotely and is fully configurable via telecommands. The apparatus can be a useful tool to detect, identify, and monitor oil spills when placed in buoys or added to marine or aerial vehicles. (C) 2017 Optical Society of America