The Federal P8I-R1 Dial Indicator is a precision dial gauge with 0.02 mm resolution and an integrated revolution counter. This model carries the part number P8I-R1 and is designed to measure small linear displacements with a clear dial readout, while the revolution counter records turns of the indicator to document larger movements over time. It is used in metrology and inspection tasks in machining and quality-control environments to detect tiny travel in fixtures and workpieces and to verify setups.
