HCUS-600 Ultrasonic Level Sensor HCUS-600 is a split type ultrasonic level sensor, split type is a 4-wire instrument, (4-20) mA, RS485 and relay can be selected at the same time, also 220VAC power supply as optional. It is now SPAN certified! Water | Level Measurement & Monitoring | HCCK Add to Enquiry Cart Download PDF