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Helical Screw Flowmeters

Litre Meter Ltd UKT: +44 (0)1296 670200 F: +44 (0)1296 670999 E: sales@litremeter.com

Helical Screw Flowmeters

The Helical Screw Flowmeter has rotor scrolls which accept and release continuous fl ow. While the fl ow is being transported through the centre portion of the meter, it is trapped by the 'fl ights' of the scrolls, these form positive displacement 'pockets'. The meter inherently provides a high resolution pulse output from a many toothed polewheel on the end of one of the scrolls. The polewheel is sensed by the sensor and transmitter electronics which provides a square wave pulse. This pulse can be transmitted long distances and has good noise immunity.
End viewshowing Flow PortsHigh Pressure SensorPole Wheel OutletInletRotor Scrolls Key advantages• Wide range of applications • High accuracy • Robust design • No fl ow conditioning required • Bi-directional capability • Easy installation • Multiple port connections available

Display and output options s

Display of rate and total Hazardous area approved for either Exi or Exd Analogue and scaled pulse outputs AC, DC or battery power supply options RS232, RS485, HART, Foundation Fieldbus and Modbus communication Linearisation Printers and printer outputs Flow alarms Ratio control Batching control Pipe, wall, head and panel mounting options Temperature and Pressure compensation for fl uids and gases Enclosures rated up to IP68 and others suitable for sub-sea applications

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