Any measuring instrument can be calibrated (marked) to indicate measurements
in any system of units.
Like the speedometer of a car that has both mph and km/hr scales on the same dial.
Or a thermometer that has a Fahrenheit scale on one side and a Celsius scale on
the other side.
Or a school ruler that has inches marked along one edge and centimeters marked
along the other edge.
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That is called the reliability of the instrument. It refers to the consistency and stability of the measurements it provides over time.
An anemometer is the instrument that measures wind direction using a wind vane.
lectometer
a scale
a dendrometer is used to measure trees.