Electronic calipers are relatively expensive compared to the standard vernier style, and not as tolerant to heat and chemical exposure. They are quite accurate, quick, and easier to read, however. Close-up view of the calibration markings on a vernier caliper. The upper markings on this caliper are metric, the lower markings are English. The measurement shown is 4.66 cm.
Electronic calipers have a window for a digital display.
Most electronic calipers have a number of optional controls such as metric to english conversion, memory and adjustable start points. Spring-loaded OD Calipers are an inexpensive alternative to vernier calipers. They do have limitations - primarily in accuracy and versatility. Advantages other than cost may be in the increased measuring capacity or range, and heat tolerance when making rough measurements during the glass fabrication process. The horizontal threaded rod contains a thumbwheel for adjusting the width of the two measuring arms.