Measurement advantages of the heavy hammer level gauge: the electronic cabin of the heavy hammer level gauge can withstand low temperature up to -40℃, and the isolation and sealing of the optical sensor can fundamentally avoid dust pollution. The patented optical measurement system of heavy-duty material level gauge is accurate, and excellent driving motor and heavy-duty steel cable can provide strong tensile capacity. The design of double optical sensors of the heavy hammer level gauge can correctly judge the state of the steel cable, without using a mechanical braking device that may cause jamming, and the patented winding device ensures that there will be no problems of wire disorder and jumper.