... 350mA Output:RS485,4~20mA Ultrasonic Level Sensor UE3000 HOLYKELL small blind precision ultrasonic sensors, designed for high precision, small blind, small scale ... 49mm or a M49 × 1.5's gong jack.Ultrasonic Sensor Main technical characteristics: 1, non-contact measurement, environmental protection, ... ~ 4 relay switching value or output: (determined when ordering). Ultrasonic Level Sensor UE3000