Abstract: A sensing probe intended to measure the content of an oxygen reducible substance in a fluid, includes: a probe body containing an interface and processing circuit, a dry sensing head including an amperometric sensor intended to measure the content of the oxygen reducible substance. The sensing head is removable. The sensing head and the probe body include respectively coupling elements cooperating with each other and able to be separated, and the sensing probe furthermore includes connecting elements designed to connect the removable sensing head to the interface and processing circuit of the probe body.