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    Bruel & Kjaer ZR0020 Integrator w/ dB Vibration Unit Converter Wheel Rule QH0001

    Working integrator signed Brüel & Kjaer model ZR 0020 with a 3 settings lever: Displacement, Velocity and Acceleration. Includes its original dB vibration unit converter wheel QH0001. Very clean, light wear only. High quality instrument from the 1960's for sound level calibration.

    $55.00 USD

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