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Product Briefs
Pressure-measuring spark plug
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Optrand's CALplug pressure-measuring spark plug combines a modified production spark plug with the firm's fiber-optic-based AutoPSI pressure sensor. A miniature sensor of 1.5 mm (0.06 in) diameter is flush-mounted inside the spark plug metal shell, thus having unrestricted and direct access to combustion cylinder pressure. The device is designed for knock detection, calibration, and mapping of racing as well as conventional engines.
AEI June 2000
For more information, circle 169
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