... 6VDC 350mA Output:RS485,4~20mA Ultrasonic Level Sensor UE3000 HOLYKELL small blind precision ultrasonic sensors, ... display, control signal output, the transmitter circuit as a whole, using SMD chip components and the U ... as there is a hole of 49mm or a M49 × 1.5's gong jack.Ultrasonic Sensor Main technical ... to install on-site requirements. 4, with a wide range of temperature compensation and the original ...