... :12.6VDC 350mA Output:RS485,4~20mA Ultrasonic Level Sensor UE3000 HOLYKELL small blind precision ultrasonic sensors, designed for high precision, small ... of 49mm or a M49 × 1.5's gong jack.Ultrasonic Sensor Main technical characteristics: 1, non-contact measurement, environmental protection, safety ... 1 ~ 4 relay switching value or output: (determined when ordering). Ultrasonic Level Sensor UE3000