How to Choose the Correct Borescope Diameter and Why Its Cost Differ?

A borescope is an optical instrument professional use for inspection in areas inaccessible through other means. Borescopes are available in different length and diameter. The choice of diameter and length will depend on the application, its access point, and internal passageway intricacies. The access point will decide the necessary diameter, while the probe has to be long enough to reach a...