Integrated leakage measuring sensor and dual-layer oil tank using integrated leakage measuring sensor

The invention discloses an integrated leakage measuring sensor and a dual-layer oil tank using the integrated leakage measuring sensor. The sensor comprises a bottom flange disc, a conversion joint with a cavity is arranged on the flange disc, a ball valve, a pressure meter and a double nipple which communicate with the cavity of the conversion joint are arranged on the conversion joint, the end of the double nipple is closed, a tail signal line of an oil and water detection probe penetrates the bottom flange disc and the cavity of the conversion joint, and finally penetrates out of the sealing end of the double nipple, according to the integrated leakage measuring sensor, when the dual-layer oil tank is delivered of a factory, the oil tank is directly mounted on a tank top flange hole, mounting is convenient, time and labor are saved, one flange disc can be omitted, and production cost is reduced. According to the integrated leakage measuring sensor, a manhole well, the dual-layer oiltank and a dual-layer co