The ZSRD501~ZSRD506 explosion-proof Tank Silo Bin 10m-120m contactless Radar Level Transmitter with rs485 output and alarm adopted 26G high-frequency radar sensor, the maximum measurement range can reach up to 80 meters. The antenna is optimized for further processing; the new fast microprocessors have higher speed and the efficiency can be done signal analysis, the instrumentation can be used for reactor, solid silo and very complex measurement environments.