The FNIRSI FDM01 is a reliable sound level meter for offices, construction sites, transportation, and industry. A sensitive 6 mm condenser microphone ensures accurate readings with switchable FAST (1 s) and SLOW (1.25 s) responses for dynamic or steady noise sources. Measurements use A-weighting across 31.5 Hz – 8.5 kHz, matching human hearing perception.
On the clear 2.3″ VA display, you can easily read current values and MIN/AVG/MAX statistics. A light alarm warns when a set threshold is exceeded, and the HOLD function freezes the displayed value for documentation. A durable ABS body, silicone buttons, and a soft windscreen improve comfort and accuracy in the field.
Key advantages:
- 30–130 dB range with ±1.5 dB accuracy
- A-weighting, frequency range 31.5 Hz – 8.5 kHz
- FAST/SLOW modes, MIN/AVG/MAX, HOLD
- 2.3″ VA display with backlight and clear scale
- Rechargeable 600 mAh battery, USB‑C charging
- Light alarm on limit exceed, OVER/UNDER indication
- Durable ABS construction with silicone buttons
