Clarostat

Clarostat

Clarostat was a U.S.-based manufacturer of precision passive components and resistance standards, best known for its resistance decade boxes. The Clarostat 240-series decade boxes provided laboratory-grade variable resistance in decade steps, and were widely used in calibration laboratories, electronics development, and circuit testing applications throughout the latter half of the 20th century.

Clarostat decade boxes are notable for their robust construction and high power handling capability, with models such as the 240C supporting elevated power dissipation compared to standard laboratory decade boxes. These instruments remain present in legacy calibration environments where their traceable resistance values and mechanical reliability continue to provide utility.

Key Product Lines

• Resistance decade boxes providing switched decade resistance in calibration and R&D applications
• High power resistance decade boxes for applications requiring elevated current or power dissipation

Industries Served

Clarostat resistance standards were used in electronics R&D laboratories, metrology and calibration facilities, educational institutions, and production test environments requiring precise, switchable resistance references.