Recent years have clearly shown that users of level instrumentation are increasingly turning to time-of-flight measurement methods. This technique offers decisive advantages in comparison with other methods: It does not have any moving parts and is virtually independent of the respective medium properties and process conditions.
Different requirements in continuous level measurement demand principles specifically suited to meet them. Radar technology, having captured a firm place in non-invasive level measurement in liquids of all kinds after the introduction of 2-wire technology, is now also available for level measurement in bulk solids. Endress+Hauser has developed auxiliary components producing a significant increase in radar sensor sensitivity with low power input.
Two designs
Micropilot M FMR250 is available in two compact designs: with horn or parabolic antenna. It is mainly used in level measurement in high silos with powdery or lumpy bulk solids, eg, cement, raw meal, fly ash, clinker or animal feed. Dust, filling noise, pressure and temperature layers do not impair the reliability of measured values. This non-invasive measuring principle is also suitable for the measurement of abrasive bulk solids, eg, iron oxide.
The maximum measuring range of Micropilot M FMR250 is 70 m and it can handle applications up to 200°C. Its two-wire technology provides simple and cost-effective wiring. The integrated air purge connection ensures reliable functioning, even in extremely dusty applications - and this without any labour-intensive and expensive retrofitting. The alignment unit provides optimum adjustment to angled surfaces and prevents interfering reflections. Commissioning and operation is handled via the plain language display directly on site or the ToF-Tool/FieldCare operating software from the control room.
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