What is the precision of an instrument?
- It is the smallest unit an instrument can measure
Accuracy of Instruments
Meter Ruler
- Measurement: Several cm up to a metre
- Accuracy : 0.1cm
Tape measure
- Measurement: Several metres
- Accuracy : 0.1cm
Vernier Caliper
- Measurement: Typically 1cm to 10cm
- Accuracy : 0.01cm
Micrometer screw gauge
- Measurement: Typically less than 2.5 cm
- Accuracy : 0.001cm