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Welcome to the Indicators Collection.

The engine indicator is a fascinating instrument that records how the pressures in the cylinders of steam and internal-combustion engines change during the operating cycle. Used properly, they can identify problems ranging from bad valve settings to constricted steam pipes. Read more about indicators


Boys' Power Meter

Boys' Power Meter - More Details

Darke's High Speed Indicator

Kenyon’s Patent Pistonless Steam Engine Indicator, no. 111

New Style Tabor Indicator

Patent Direct-Acting Swivel Arm Steam Engine Indicator

Richards high-speed steam engine indicator

Richards’ Improved Patent Steam Engine Indicator, no. 9875

Richards steam-engine indicator

Steam Engine Indicator Typ 50, external spring, no. 20896