Sage Metering's Prism™ flowmeter is battery operated and features extensive datalogging capability. Designed to operate for up to 10 hours on a built-in rechargeable Lithium-ion battery, the unit can measure and log gas flows through existing ports in pipes 1 in. and larger. The ergonomically designed prism portable can log in auto logging mode or manual logging mode. Auto mode will capture a flow data point every 10 s and manual mode will capture a flow data point each time the LOG/AUTO button is pressed.