Dial Indicators, Comparators & Test Indicators | ULTRA Shop

Buy analog and digital dial indicators, comparators, and test indicators from ULTRA, Sylvac, and Käfer online. High-precision measuring instruments for production and quality assurance.

Dial indicators, comparators, and lever-type test indicators from ULTRA, Sylvac, and Käfer form the foundation for highly accurate comparison, runout, and flatness measurements in industrial dimensional metrology. Unlike direct-measuring instruments such as calipers, these devices operate on the comparator principle to reliably capture deviations within the micrometer range relative to a pre-set reference point.

Analog dial indicators utilize a mechanical gear train to translate the linear displacement of the plunge stylus into a circular pointer movement. For particularly critical tolerance inspections, dial comparators are used, which feature a specialized lever-gear mechanism providing extreme magnification with minimal hysteresis. Lever-type test indicators utilize a lever system with a swiveling contact point, making them exceptionally suited for tactile probing in hard-to-reach areas or internal bores.

Digital dial indicators capture the measuring displacement via an electronic, capacitive, or inductive linear scale. This completely eliminates reading errors, allows switching between measurement units, and enables direct digital transmission of measuring values to modern CAQ software solutions.