... meter for distance measurement 2.Ac or Dc power supply optional 3.Apply to all kinds of medium ... , well, Drains, measuring boxes, granaries, silo, etc.Specifications1.Power supply: DC24V(±10%),30mA2.Output signal:4~20mA 2-wire3 ... 3 touch buttons5. Sensor material:ABS /PVC6. Output signal: 4~20mA 2-wire,Provide MODBUS7. Relay output:Floor\Highest alarm ... ,7m,10m,15m Universal Ultrasonic level meter\sensor