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 |
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