Abstract: The present invention is generally related to a multi-purpose, low cost, submersible fluid probe. The probe is comprised of a housing, a printed circuit board (PCB), and an electrical cable. The housing is a threaded machined fitting that supports the PCB and includes a port to allow the electrical cable to connect to the PCB. The PCB includes dual traces formed in a planar rectangular spiral pattern. The electrical cable includes jacketed conductors and an integral connector that allows the probe to be connected to various control circuits and used for multiple purposes.