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ARAD High Pressure Hydrometers for Reliable Flow Monitoring and Mainline Shutdown


The ARAD Hydrometer is an industrial grade master valve and flow meter integrated into a single unit. 

The master valve portion is a double-chambered hydraulically operated valve designed to operate under high pressure and is controlled with either a 24VAC or DC latching solenoid.

ARAD Hydrometers can be ordered as normally open (NO) or normally closed (NC) units and can be modified in the field with a NO or NC 24VAC or DC latching solenoid kit without having to remove the hydrometer. 

The flow meter register is driven by the impeller through magnetic coupling leaving just one moving part, the impeller, in contact with the water. 

The register is hermetically sealed in a stainless steel capsule with tempered glass and includes a totalizer to display the volume of water passed as well as a rotating leakage detector. 


The flow meter uses a dry contact reed switch which requires no tools to remove, inspect, or replace. The register can be removed or installed without shutting down the hydrauic system. 

The dry-contact reed switch for the flow meter and the valve activation solenoid can be conncted to any Motorola field controller with standard irrigation valve wiring and requires no specialized shielded or signal wire

The ARAD Hydrometer has no "straight pipe requirement" on the water input or output for flow meter accuracy. The hydrometer can be installed in the downstream leg of a backflow prevention device for easy access and maintenance.

Available sizes --- 1.5", 2", 3", 4", 6", and 8".