1.Ultrasonic water meter for water\liquid level 2.Ac or Dc power supply ... know the corresponding measured distance. This product is non-contact measurement, high precision, strong anti-interference, operate in the most demanding ... , pool, well, Drains, measuring boxes, granaries, silo, etc.Specifications1.Power supply: DC24V(±10%),0.1A ; AC220V (±20%), 0.05A2.Pricision:0.2%(FS) 3 ...