Maths functions allow calculations for orifice plates, "V" notch weir flow and rectangular (Cippaletti) weir flow. A filter is available for noisy or fast-moving signals. Data Track provides a user linearisation facility for applications such as tank contents measurements. All of the Tracker series input types can be scaled to any engineering units within a particular display range or, if necessary, mapped to one of the thermosensor or user linearisation curves. A specific gravity (SG) correction function is also available.