FNIRSI FDM02 Digital Noise Meter Professional Model is a high precision sound level measuring instrument designed for accurate environmental noise testing, industrial inspection, workplace safety, home acoustics, factory monitoring, construction noise analysis, and laboratory use. This professional decibel meter features advanced A/C frequency weighting, fast and slow time response, real-time curve recording, and multi-function display showing noise level, temperature, and humidity simultaneously. Built with a high-sensitivity capacitive microphone and intelligent processing system, the FNIRSI FDM02 noise meter ensures stable, reliable, and repeatable measurements across a wide sound range from 30dB to 130dB. Its compact portable design, 1500mAh rechargeable battery, TFT color display, data logging, alarm record, and adjustable brightness make it suitable for long-term field use. The curve visualization mode helps users clearly observe sound fluctuation trends over time, making it ideal for professional acoustic measurement, environmental monitoring, factory inspection, traffic noise testing, classroom noise monitoring, and home sound evaluation in Bangladesh market.

Features:

• High precision digital noise meter with ±1.5dB accuracy for professional sound measurement

• Wide measurement range from 30dB to 130dB suitable for low and high noise environments

• A-weighting and C-weighting selectable for professional acoustic analysis

• Fast and slow time weighting modes for instant or averaged sound response

• 1.25 second fast measurement for stable and quick noise readings

• Capacitive high-sensitivity microphone for accurate sound capture

• Curve recording mode to visually display noise variation over time

• Real-time noise curve updates for better analysis and comparison

• Multi-function display showing decibel level, temperature, and humidity together

• Built-in high precision temperature and humidity sensor

• Dynamic scale display with fast and slow refresh options

• Alarm record function storing up to 30 high and low threshold events

• Overload indication for high and low sound level alerts

• Adjustable brightness from 5% to 100% for indoor and outdoor visibility

• Day and night dual display mode for eye comfort

• Language switching support including English and Chinese

• Built-in clock with date and time display

• Adjustable sleep brightness and sleep time settings

• Auto power off function adjustable from 1 to 60 minutes

• Rechargeable 1500mAh lithium battery for extended working time

• Compact and lightweight portable design for field measurement

• Durable ABS body for long-term professional use

• Suitable for factories, workshops, schools, offices, homes, traffic monitoring, environmental noise testing, and sound engineering

How to Use

• Power on the device using the main power button

• Select A or C weighting depending on measurement environment

• Choose FAST or SLOW time weighting based on response requirement

• Point the microphone toward the sound source

• Read real-time decibel values on the display

• Switch to curve mode to visualize noise changes over time

• Set alarm thresholds for high or low noise alerts

• Adjust brightness and display mode for comfortable viewing

• Use temperature and humidity readings for environmental reference

• Recharge the battery using the included charging cable

• Store safely in the provided storage bag after use

Applications

• Environmental noise monitoring

• Industrial and factory noise testing

• Construction site noise measurement

• Office and workplace safety compliance

• Classroom and educational noise monitoring

• Home sound level checking

• Generator and machinery noise testing

• Audio equipment testing

• Traffic and roadside noise analysis

• Laboratory and research use

Specifications:

• Part name: FDM-02 high precision noise meter

• Material: ABS

• Color: As shown

• Size: 138 × 63 × 28 mm

• Screen: 2.0-inch TFT color screen

• Display digits: 4 digits

• Resolution: 0.1 dB

• Frequency weighting characteristics: A / C

• Time weighting characteristics: FAST 125ms, SLOW 1s

• Frequency response: 31.5Hz – 8.5kHz

• Dynamic scale display update: fast 0.5 times/second, slow 1 time/second

• Dynamic range: 3.50 dB

• Accuracy: ±1.5 dB (94dB @ 1kHz reference)

• Measurement range: 30dB – 130dB

• Alarm record capacity: 30 records

• Brightness adjustment: 5% – 100%, step 5%

• Curve interface update: every 0.5 seconds

• Overload indication: high report, low report

• Value setting range: minimum 0.0 dB, maximum 130.0 dB

• Language support: Chinese / English

• Style mode: day mode / night mode

• Date and time: year, month, day, time

• Sleep setting: adjustable sleep brightness and sleep time

• Auto shutdown: adjustable 1–60 minutes

• Battery: 1500mAh 3.7V lithium battery

Package Content

• 1 x FNIRSI FDM-02 Digital Sound Level Meter

• 1 x USB Data Cable for Charging

• 1 x Protective Storage Bag

• 1 x User Manual

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