Accuracy of a measurement instrument defines how much a measurement value may deviate from the perfect measured value.
Accuracy is very closely connected with precision, but unlike precision it is constrained by a series of fixed reference points or absolute values that all readings are compared with to define the exactness of the instrument measurement. Typically these comparison absolute values are read from a more accurate instrument ideally with a 10 to 1 ratio difference in accuracy to ensure it does not contribute significantly to the overall error calculation. However in practise it is not always possible to achieve such a high ratio difference in accuracy. When this is the case the overall accuracy should also include the reference instrument uncertainty which better reflects the true accuracy of the device.
- 1,500 psig 4-20mA out mineral hydraulic oil pressure sensor for material testing machines
- 500-1100 mbar absolute 0-10Vdc out air pressure sensor for meteorological use
- 10 bar calibration reference pressure sensor
- 5 metre range high accuracy 4-20mA output non-corrosive liquid level sensor with G1/4 male external fitting