... Design, Operating Temperature from -15 °C to 50 °C Complies with IEC 61672 Class 2 USESWidely use in Industrial Noise Surveys ; machinery ... , L90, L95, SDNOYESIntegral TimeNOManual, 10 s, 1 m, 5m, 10 m, 20 m, 30 m, 1 h, 2 h, 4 h, 8 h, 12 h ... , 16 h,24h Manual, 10 s, 1 m, 5 m, 10 m ... , 20 m, 30 m, 1 h, 2 h, 4 h, 8 h, 12 h ...