FNIRSI FDM01 Noise Decibel Meter

The FNIRSI FDM01 is a compact and versatile decibel meter engineered for accurate environmental noise measurement combined with real-time temperature and humidity monitoring. It operates within a 30–130 dB range and utilizes A-weighting frequency response to reflect human hearing sensitivity, ensuring reliable assessment of sound levels in workplaces, public environments and industrial settings. The device is equipped with a high-sensitivity 6 mm condenser microphone designed for rapid response and stable performance, supported by shielding structures that reduce interference and maintain measurement consistency even during sudden sound fluctuations.

Users can select between FAST and SLOW detection modes, allowing either rapid response to dynamic noise changes or stabilized readings for constant sound sources. Additional measurement functions include MIN, AVG and MAX value tracking, as well as a HOLD function for freezing readings on screen. A visual alarm indicator alerts users when predefined noise thresholds are exceeded, improving situational awareness in regulated environments.

The 2.3-inch VA color display with backlight provides clear and readable data presentation under various lighting conditions. The device is housed in durable ABS material with protective design elements, including a windscreen that minimizes environmental interference. Powered by a 600 mAh rechargeable lithium battery with USB-C charging, the FDM01 offers convenient, cost-efficient and portable operation suitable for office, construction, transport and industrial noise monitoring applications.

Performance highlights:
• 30–130 dB measurement range with A-weighting
• High-sensitivity 6 mm condenser microphone
• FAST/SLOW response modes for flexible measurement
• MIN/AVG/MAX tracking and HOLD function
• Visual alarm for noise threshold indication
• 2.3" VA color display with backlight
• 600 mAh rechargeable battery with USB-C charging