Amprobe SM-20A
The Amprobe SM-20A is a handheld sound level meter for professional noise measurement in environments where a quick and useful answer is needed to determine the actual sound level. It is used to check sound levels for safety, occupational health and safety, and quality control.
The instrument measures both A-weighted and C-weighted levels. A-weighting is typically used for general noise measurements, while C-weighting is relevant when a different picture of the sound level is desired in more technical contexts. The measuring range is from 30 to 130 dB for A-weighting and from 35 to 130 dB for C-weighting, and the display shows the measurement with 0.1 dB resolution.
It is also a measuring instrument that can be used over time. There is internal memory for up to 14,000 readings, and the logging interval can be set from 1 second to 8 hours. At the same time, data can be transferred to a PC via USB, so measurements can be saved and reviewed afterwards. The Max/Min and Data Hold functions make it easier to track fluctuations and hold a specific measurement on the display.
The SM-20A operates with both Fast and Slow time weighting, so you can choose the response that suits the situation. The stated accuracy is ±1.5 dB, and the frequency range is 31.5 Hz to 8 kHz. This makes it suitable when you want a practical and clear tool for noise measurement in daily operations.
See data sheet from the manufacturer
See product video from the manufacturer
Typical applications
- Noise measurement in connection with occupational health and safety
- Control of sound levels in industrial environments
- Quality control and acoustic measurements
- Logging of sound levels over time
Specifications
- Manufacturer: AMPROBE
- MPN: 3477333
- Model: SM-20A
- A-weighted measuring range: 30 to 130 dB
- C-weighted measuring range: 35 to 130 dB
- Frequency range: 31.5 Hz to 8 kHz
- Resolution: 0.1 dB
- Display: 4-digit LCD
- Time weighting: Fast (125 ms) and Slow (1 s)
- Internal memory: up to 14,000 readings
- Logging interval: 1 second to 8 hours
- Functions: Max/Min and Data Hold
- Accuracy: ±1.5 dB
- USB PC interface
- EAN/GTIN: not verified in the provided data
- Datasheet: https://amprobe.com/wp-content/uploads/2024/10/SM-20-A_data_sheet.pdf
- Product video: https://amprobe.com/wp-content/uploads/video/Environmental+Testers/Sound/SM-20%E5%92%8CSM-10/Amprobe+Sound+Meters.mp4
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