How to choose a hardness tester
The material, the size of the part and the hardness scale your drawing calls for decide which hardness tester you need. This guide works through metals, rubber and plastics, portable and bench testers, and what each method can and cannot do.
How to choose a coating thickness gauge
The metal under the coating and the thickest coating you expect decide which coating thickness gauge you need. This guide explains ferrous and non-ferrous probes, measuring ranges, and when you need a different instrument altogether.
How to choose a pipe inspection camera
Pipe diameter, inspection distance and whether you need to locate the camera underground decide which pipe inspection camera suits you. This guide explains the choices and where each type of system fits.