The GF Signet Portaflow 220 / 330 ultrasonic flow meter range provides simplified measurement of liquid flow in industrial environments with clamp-on installation and an easy to use interface. It is designed primarily for temporary or semi-stationary use. The clamp-on design eliminates pipe modification, allowing quick installation and removal .

The meters feature a flow velocity range of 0.1 to 20m/s with accuracy varying based on pipe ID. For pipes less than 2.95 inches, accuracy is ±0.5% to ±2% of reading; for pipes 0.51 to 2.95 inches, accuracy is ±3% of reading. A general accuracy specification of ±6% of reading applies across all pipe IDs. Response time is less than 500ms depending on pipe diameter .

Powered by 9 to 24 VDC, the unit includes a rechargeable battery capable of up to 14 hours of continuous operation. An optional datalogger function can store up to 100 million data points. The backlit display and push button interface ensure easy operation in various lighting conditions. Analog and pulse outputs are provided for integration with external systems .

Applications include potable water, river water, cooling water, demineralized water, water/glycol solutions, chemicals, leak detection, and boiler testing. The meter is suitable for multiple pipe materials including CPVC, PVDF, steel, copper, and more .