SeaMetrics Inc.'s (Kent, WA) TB line of turbine flowmeters is all electronic, except for one moving part - the rotor assembly. According to the manufacturer, the rotor has a jeweled journal bearing and a ceramic shaft to maximize performance and minimize wear in applications with pressures up to 250 psi, temperatures to 250 degrees F, and flow rates to 1,200 gpm. The flowmeter is designed to provide a pulse-type square wave output signal that can be sent up to 2,000 ft without a transmitter. Flow rate accuracy is ±0.5% full scale. Line sizes are from 1 to 4 in.