... .Low cost good quality 2.LCD/LED big display screen Ultrasonic Water Meter Small Range: 4m, 6m, 8mMedium Range: 8m, 10m, 12mLarge Range ... : 15m, 20m, 30m, 40mMT Two-wire Series Ultrasonic Level MeterThis series adopts ... supply.The MTU series is a multifunction type four-wire ultrasonic Level Meter, which is of DC or AC power supply, DC4 ...