1.Description: ultrasonic level meter 2.Accuracy:0.25%, 0.5% 3.Blind spot:0. ... 4.Protection class:IP65 Pass ISO 9001, CE ultrasonic level meter Item The Specification of ultrasonic level meterModelRV100LRange0 ~ 20m from the ... relay output, high precision 4-20mA current output, Rs-485 digital communication output ultrasonic level meter