... 6 (full angle) 1. Product Introduction: H-type ultrasonic level gauge metal alloy shell, beautiful appearance, and ... lightning protection, overvoltage, overcurrent protection circuit H-type ultrasonic liquid level meter installation, maintenance, calibration simple. The ... 2.Product Specification:Item The Specification of ultrasonic level meterModelH ultrasonic level meterMeasuring range0-3m,0-6m,0- ...