Digital Sound Level Meter 30~130 DB Noise Analyzer – GAOTek

Description Overview This is a high-accuracy sound level meter designed for industrial, environmental, and safety applications. It measures noise levels from 30 to 130 dB with ±1.5 dB accuracy. Built to IEC651 Type 2 and ANSI S1.4 Type 2 standards, it ensures reliable results in various environments. Ideal for engineers, quality control, and noise pollution studies.   Features Designed according to GB/T3785-1983 & IEC61672-2002 Class 2 standards High accuracy of ±1.5 dB Measurement range: 30–130 dB Real-time frequency response: 20 Hz ~ 8 kHz Max function & Data Hold LCD backlight for low-light use Auto Power Off after 10 minutes 10,000 data recording & USB connectivity for PC analysis AC/DC signal output for external monitoring Sturdy ABS plastic build for industrial use   Technical Specifications Frequency Range 31.5 Hz ~ 8.5 kHz Response Frequency 20 Hz ~ 8 kHz Frequency Weighting A, C Time Weighting FAST / SLOW Resolution 0.1 dB Accuracy ±1.5 dB Measuring Range 30130 dBA / 35130 dBC Dynamic Range 50 dB / 100 dB Level Ranges 30–80 dB; 50–100 dB; 60–110 dB; 80–130 dB Sample Rate 20 times/second Microphone 1/2 inch (12.7 mm) polarization capacitance microphone Digital Display 4 digits Analogy Bar Graph 1 dB or 1 bar graph Data Storage Capacity 4700 records Self Calibration Time 10 seconds (on startup) Signal Output (AC) 4 Vrms / full bar graph, 600 Ω impedance Signal Output (PWM) Duty cycle = 0.01 × dB value / 3.3 × 100% Calendar Accuracy ±30 seconds/day Max & Min Hold Yes Auto Power Off Yes (after 10 minutes inactivity) Backlight Display Yes Overload Indication OVER / UNDER Operating Temperature 0–40 °C (32–104 °F), 10%–80% RH Storage Temperature –10–60 °C (14–140 °F), 10%–70% RH Material ABS Plastic Power Supply External / Battery