The Thermal Insertion Probe Model 62-9 is designed to measure the flow rate of gases, liquids, or slurries, in stacks, irregularly shaped lines, and product ducts. Unlike other probe flow meters, the model 62-9 has no apertures that can become clogged with particles or distorted by heat. The sensing element is located on the probe's inside leading edge and has no contact with the flow stream. The Model 62-9 may be constructed of pipe or tubing using any metal compatible with the flow stream of a given application. It may also be built with extra length, so it can be inserted through a gate valve and packing gland. This will allow easy insertion and removal while the pipe is in use. The thermal probe's electrical connections can be made either in a gasket type condulet or an explosive-proof condulet. For applications over 350°F, the sensors are made of platinum embedded in a ceramic matrix, securely bonded to the pipe's inside diameter. An additional temperature sensor may also be installed, as well as independent circuitry to provide fluid temperature readout signals.