Model: YSD130(A) Description: YSD130(A) Coal Mining Sound Level Meter MA: MFB160199 KA: KFB160033 ExibI: 116.4341 Introduction: 1. Intrinsic safe noise detector, large dynamic range. 2. Fast-slow time constant set, portable and convenient. 3. Applicable for noise detector in coal mining, industrial park, explosion-proof place. Technology parameters: 1. Power: (a) Voltage: DC, 6V (b) Current: â?¤30mA 2. Measuring range: 35~130 dB(A) 3. Frequency range: 20Hz~12.5 kHz 4. Relative error: ± 1.4dB