... overvoltage, overcurrent protection circuit H-type ultrasonic liquid level meter installation, maintenance, calibration simple. The products ... , water treatment, water, food, food and other industries Level measurement with safe, clean, high precision, long life, reliable ... Product Specification:Item The Specification of ultrasonic level meterModelH ultrasonic level meterMeasuring range0-3m,0-6m,0-10m ...