Description: SOUND LEVEL METER Model : SL-4011 * Frequency & time weighting meet IEC 61672 class 2. * A, C weighting, Max., Data hold, fast/slow time weighting. * AC/DC output, Max. Hold. * Reset button for Max. hold. * Range : 3 ranges, 35 to 130 dB. * Size : 250 x 83 x 32 mm.
Description: SOUND LEVEL METER, Auto Range & RS-232 Model : SL-4012 * 30 - 130 dB, Auto range, Manual range. * Frequency & time weighting meet IEC 61672 class 2. * A & C frequency weighting. * Fast / Slow time weighting, Data hold. * Peak hold, Memory (max., min.). * AC output & RS-232. * Size : 268 x 68 x 29 mm.