The FNIRSI FDM-02 is a precision sound level meter equipped with a color display and a high-quality condenser microphone, enabling accurate measurement of noise levels in various work environments. It supports A/C frequency weighting, FAST/SLOW modes, and a data logging function that generates graphs. Additionally, it allows you to monitor ambient temperature and humidity. All of this makes the device ideal for professional acoustic measurements, monitoring working conditions, and more.
Precise noise measurement
The device uses a condenser microphone, which ensures high sensitivity and measurement stability. The FDM-02 model provides accurate real-time sound level readings, allowing for effective monitoring of noise levels in rooms, workplaces, or public spaces. The easy-to-read display presents current measurement values clearly, facilitating quick analysis of results. Additionally, the meter supports two frequency weighting modes—A and C—allowing you to adjust the measurement method to the type of noise being analyzed. You can also use the FAST and SLOW modes, which enable faster or more stable measurement sampling depending on operating conditions.
Temperature and Humidity Measurement
The device not only allows you to check sound levels but also to monitor ambient temperature and humidity. This feature enhances the meter’s functionality and makes it easier to control environmental conditions while performing acoustic measurements.
Color screen and user-friendly operation
The color display provides a clear image and allows for easy reading of parameters. Additionally, the ergonomic button layout allows you to quickly switch between operating modes and change settings, improving user comfort during both field work and indoor measurements. The FNIRSI FDM-02 also offers a data logging function and a Curve Recording mode, which allows you to visualize changes in sound levels in the form of graphs. This makes it easier to analyze noise fluctuations over a specific period and compare results without the need for manual note-taking.
Included
Sound level meter
USB cable
Carrying case
Manufacturer
FNIRSI
Model
FDM-02
Display
2.0" color TFT screen
Result display
4-digit, resolution 0.1 dB
Frequency weighting characteristics
A and C
Available modes
FAST (approx. 125 ms), SLOW (approx. 1 s)
Frequency range
31.5 Hz – 8.5 kHz
Dynamic range / value update
FAST: 0.5 times per second SLOW: 1 time per second
Dynamic range
3.50 dB
Accuracy
±1.5 dB (standard sound source, 94 dB @ 1 kHz)
Measurement range
30 dB – 130 dB
Alarm log
30 entries, recording time and type of high and low thresholds
Brightness adjustment
From 5% to 100%, 5% adjustment step
Graph interface
Updated every 0.5 s
Overload indicator
Exceeding or falling below the measurement range
Threshold settings
Minimum: 0.0 dB Maximum: 130.0 dB
Supported languages
Chinese / English
Interface mode
Style switching (day / night)
Date and time settings
Year, month, day, hour
Hibernation settings
Adjustable sleep mode brightness and adjustable hibernation time
Auto-off
Yes, adjustable time from 1 to 60 minutes
Battery
Lithium 1500 mAh / 3.7 V
Battery indicator
Yes
Data hold
Yes
Power indicator
Yes
Noise level indicator
Yes
Dimensions
183 × 63 × 28 mm
FNIRSI
InnPro
Measuring tools
Tools
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