sound level meter, type 1 model : sl-4022 * frequency & time weighting meet iec 61672 class 1. * 30 to 130 db, 3 ranges, max. hold, data hold. * a/c frequency weighting, f/s time weighting. * ac output, internal 94 db calibration. * professional sound level meter. * size : 260 x 87 x 36 mm.
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lutron sl-4022 sound level meter, iec 61672 type 1
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