Simple temperature sensor

A simple temperature sensor provided by the utility model comprises an accommodating tube, a card, a temperature measuring chip, a shielding PVC wire, a first heat shrink tube and a second heat shrink tube, the outer ring of the accommodating tube close to the end part is provided with a first annular groove and a second annular groove which are spaced at a certain distance and are used for clamping the shielding PVC wire; the temperature measuring chip is arranged at the top end of the interior of the containing pipe, the clamping piece is arranged on the outer ring, close to the end, of the containing pipe in a sleeving mode, a mounting hole is formed in the edge of the clamping piece, the first heat shrink tube is arranged at the end of the PVC wire with the shielding function in a sleeving mode, and the PVC wire with the shielding function comprises a shielding wire and a connecting wire. One end of the connecting wire is connected with the temperature measuring chip, the other end of the connecting wire