ND10 Sound Level TesterDetailed product description：

The ND10 sound level tester meets the requirements of the International Electrotechnical Commission (IEC) 651 sound level meter standard for type II sound level meters used for general purposes, as well as the requirements of the GB3785 standard. The instrument has stable performance, simple use, low price, and easy portability.

II Main technical indicators and functions:
1. Measurement range: (with 2 × 10-5Pa as reference)
1) A-level: 40dB~130dB;
2) C-level: 55dB~130dB.
2. Frequency range: 31.5Hz-8kHz;
3. Frequency weighting: A and C frequency weighting networks;
4. Range attenuator grading error: ≤ 0.5dB;
5. Meter scale: 0dB+10dB: error ≤ 0.5dB -5dB~0dB, error ≤ 1dB;
6. Amplifier output: 2V effective value of output voltage (when the meter is at full capacity);
7. Output impedance: approximately 600 Ω;
8. Minimum load impedance: 10k Ω;
9. Detection characteristics: approximate effective value;
10. Time weighting: "F fast" and "S slow";
11. Maintain characteristics: attenuation no greater than 2dB per minute;
12. Polarization voltage: 28V;
13. Correction: Sound level correction; Electrical calibration;
14. Usage conditions: Working temperature: -10 ℃ to+50 ℃;
15. Relative humidity: not exceeding 80% (at+40 ℃);
16. Power supply: 1 9V battery.

III Others:
1. Select attachments: calibrator, tripod;
2. Size: 254mm × 75mm × 50mm, weighing approximately 0.4Kg;
3. Basic configuration: host, hood, clock screwdriver, handbag;