almost the problem in the dial gage
A round gauge with a needle to point at the measure.
first fix the dial gauge at a zero settling level than place the object to be measured below it then move it to touch the thing when it touches mark the reading whether its +vwe or -ve then length equal to =original length+dial gauge reading *least count
Dial gauge.
by measuring its diameter
follow
today i observed errors between puppy dial reading & height gauge dial reading. this was 10μ to 20μ when we go to .1 mm
They have a spring attached to a dial or needle pointing at the weight on a gauge. Both spring and gauge are highly calibrated.
By the use of feeler gauge and with dial indicator as possible.
A caster camber gauge measures the caster in each wheel. The measurement has to do with wheel alignment and degrees of track on the tire.
The "fin"is actually called the Gnomon. Its alignment in azimuth on a horizontal dial is N-S, or vertical on a wall-mounted dial, andit tapers into the dial Northwards or upwards respectively;but its angle is calculated from the angle of latitude in which the instrument is to be placed.
You don't, you need a dial indicator, preferably with a magnetic mount.