Amprobe SM-20A Sound Meter
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Amprobe SM 20A
The Amprobe SM-20A Sound Meter is engineered for assessing compliance with safety standards and conducting acoustic evaluations, making it a valuable tool for safety engineers, health officials, industrial safety personnel, and quality control teams. This device also features a PC interface for enhanced usability.
It incorporates two distinct weighting filters, adhering to the requirements of IEC651 and ANSI S1.4 Type 2 for audio filtering. The A-weighting filter is intended for general noise level measurements, while the C-weighting filter is used for assessing sound levels in acoustic material control across various environments (e.g., 94 dB at 1 kHz).
Amprobe SM-20A Key Features
- Designed to meet the measurement requirements of safety engineers, health, industrial safety offices and quality control in various environments.
- A and C weightings for checking compliance with safety regulations as well as acoustic analysis
- Measuring ranges: A weighting 30 – 130 dB, C weighting 35 – 130 dB
- Frequency range: 31.5 Hz – 8 kHz
- Display with 0.1 dB steps on a 4 digit LCD
- Slow (1 sec) and fast (125 ms) response settings to check peak and average noise levels
- Max/min recording
- Internal memory, 14,000 records
- Recording intervals from 1 second to 8 hours
- PC computer download capabilities
- Data hold to freeze reading on digital display
- CE, designed to meet IEC651 type 2, ANSI S1.4 type 2
specifications
| Specifications | Details |
| General Specifications | |
| Display | 4 digits LCD |
| Microphone | 1/2 inch Electret condenser microphone |
| Low Battery Indication | Replace battery when LCD displays “�” |
| Power Supply | 9V NEDA 1604, IEC 6F22, JIS 006P battery |
| Power Life | Approx. 50 hours (Alkaline Battery) |
| Auto Power Off | Approx. 5 minutes |
| Environment | Indoor operation, < 2000 m |
| Temperature / Humidity (Operation) | 5°C to 40°C (41°F to 104°F); < 80% RH |
| Temperature / Humidity (Storage) | -10°C to 60°C (14°F to 140°F); < 70% RH |
| Dimensions | 200 x 55 x 38 mm (7.8 x 2.2 x 1.5 in) |
| Weight | 233g (0.5 lb.), including battery |
| Electrical (Audio) | |
| Standards Applied | IEC 651 Type 2, ANSI 1.4 Type 2 |
| Dynamic Range | 50 dB |
| Resolution | 0.1 dB, Display Update: 0.5 seconds |
| Time Weighting | FAST (125 ms), SLOW (1 sec) |
| Frequency Range | 31.5 Hz to 8 kHz |
| Measuring Level Range (Auto Range) | A Weighting: 30 to 130 dB; C Weighting: 35 to 130 dB |
| Accuracy | ± 1.5 dB |
| Calibration Cycle | 1 year |
| Accessories | Carrying case, windscreen, user manual, USB cable, and 9V battery |
Datasheet
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