521 Sound Level Calibrator
1000 Hz +/- 1%. Distortion Less than 2% THD. 0 dB Reference Point for: A, B, C, D Weighting. 94 dBSPL = 1 Pa
Accuracy - Meets IEC60942:2003 Class 1. +/-0.3 dB @ 23 C°
+/-0.5 dB 0 to 50 C°.
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ACO Pacific, Inc.
2604 Read Avenue
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