| Parameter | Value |
| Model | SL400 |
| Article number | 3,51,00,05,020 |
| Measuring range | 30 dB to 130 dB |
| Accuracy | ±1.4 dB (class 2 according to DIN EN 61672) |
| Resolution | 0.1 dB |
| Frequency range | 31.5 Hz to 8 kHz |
| Dynamic range | 50 dB |
| Partial measuring ranges | 30 dB to 80 dB, 50 dB to 100 dB, 80 dB to 130 dB, 30 dB to 130 dB |
| Display response time | 500 ms |
| Power supply | 9 V battery |
| Alarm function | OVER: measuring range exceeded UNDER: fallen below measuring range |
| Time weighting | FAST: 125 ms SLOW: 1 s |
| Microphone | 1/2-inch electret condenser microphone |
| Operating conditions | 0 °C to 40 °C with 10 % to 90 % RH |
| Storage conditions | -10 °C to +60 °C with 10 % to 75 % RH |
| Weight | 305 g |
| Dimensions (length x width x height) | 255 x 63 x 45 mm |
| Automatic switch-off | Switch-off after approx. 15 min of non-use |
As a Class 2 sound level meter, the SL400 is the ideal instrument for reliably documenting machine, workplace, and environmental noise. Its easy-to-read four-digit display with BarGraph and switchable backlight ensures perfect visibility in any environment. With A- and C-frequency weighting, Fast/Slow time weighting, and a wide range of practical functions, the SL400 meets the demands of professional sound level measurement. Thanks to its compact size, low weight, and one-handed operation, it is perfectly suited for everyday use in industry, occupational safety, and environmental protection. The integrated live data logging function and memory for up to 32,700 readings, combined with USB data transfer and tripod mounting capability, make the SL400 a powerful tool for long-term measurements and analysis. An additional 3.5 mm jack socket allows connection to external analysis and recording devices, completing this versatile sound measurement solution.
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