Measurement of resistance requires a small current to be passed through the device under test.

The measurements on each shale plug require at least one week.

In practice this measurement of V50 requires 1-2 vest panels and 10-20 shots.

The measurement you require for hips, bust/chest, length and so on.

But if the final measurement requires 10% accuracy, then the 3% gage never can be better than 3.3:1.

Although these parameters can be measured in principle, such measurements are difficult and require very specialized equipment.

The measurements require an accuracy in timing which is good to ten millionths of a second.

The measurements require that four ohmic contacts be placed on the sample.

A direct measurement would require easing off the magnetic field and lowering in onto a scale.

Signals are rapid but also small, and measurements from single cells require intense illumination.