... big display screen Ultrasonic Water Meter Small Range: 4m, 6m, 8mMedium Range: 8m, 10m, 12mLarge Range: 15m, 20m, 30m, 40mMT Two- ... output and hi-lo switch output.FeaturesTwo -wire, maximum range is 30m---embodiment of the our technical strengthFour-wire, maximum ... flange pipe length when adopting flange installation of small range level meterEasy key setted parameter--without waiting for evacuating ...