... protection, overvoltage, overcurrent protection circuit H-type ultrasonic liquid level meter installation, maintenance, calibration simple. The products ... Specification:Item The Specification of ultrasonic level meterModelH ultrasonic level meterMeasuring range0-3m,0-6m,0- ... full angle)PressureLess than 4 atmospheresdisplayLCD display built-level height or distanceDigital output RS485 Interface, ModBUS ...