... 12.6VDC 350mA Output:RS485,4~20mA Ultrasonic Level Sensor UE3000 HOLYKELL small blind precision ultrasonic sensors, designed ... It combines ultrasonic sensors, temperature sensors, ultrasonic servo circuit, display, control signal output, the transmitter circuit as a whole, ... or a M49 × 1.5's gong jack.Ultrasonic Sensor Main technical characteristics: 1, non-contact measurement, environmental protection ...