FNIRSI FDM01 30-130dB Digital Sound Level Meter The FNIRSI FDM01 is a high-precision digital sound level meter for quick noise measurement from 30dB to 130dB. It combines ±1.5dB accuracy, A-weighting response, fast / slow response selection, and clear digital reading in a compact handheld meter. The FDM01 also supports temperature and humidity detection, light alarm indication, mobile app intelligent linkage, automatic shutdown after 15 minutes, and adjustable sensitivity. It is designed to meet IEC 651 Type 2 and ANSI S1.4 Type 2 sound level meter standards for reliable everyday noise checks. For a compact distance measurement tool, see the FNIRSI IR40 Laser Distance Meter. For electrical bench measurement, pair it with the UNI-T UT61E+ Digital Multimeter, UNI-T UT890D+ Digital Multimeter, FNIRSI DMC-100 Clamp Multimeter, or FNIRSI 1014D Digital Oscilloscope. Technical Specifications Brand FNIRSI Model FDM01 Product Type Digital sound level meter / noise decibel meter Measurement Range 30dB to 130dB Accuracy ±1.5dB Frequency Weighting A-weighting response Response Rate Fast / slow response selection Additional Detection Temperature and humidity detection Alarm Function Light alarm indication Smart Linkage Mobile app intelligent linkage Sensitivity Adjustable sensitivity with dual mode switching Auto Power-Off Automatic shutdown after 15 minutes Standards IEC 651 Type 2 and ANSI S1.4 Type 2 Operating Environment -5 to 40°C, relative humidity up to 80% Integration Notes & Hardware Guidance Select fast response for rapidly changing noise and slow response for more stable average-style readings. Use A-weighting when the goal is a human-hearing-oriented sound level reading. Keep the microphone unobstructed and avoid touching or covering the sensor area during measurement. Store the meter in a clean, dry place and avoid rain, fog, heavy pressure, mechanical impact, and direct sunlight during storage. Charge the device when the LCD does not light up or when the meter indicates low voltage. Packing List FNIRSI FDM01 digital sound level meter × 1 USB charging cable × 1 User manual × 1 Retail package × 1 FAQ What sound level range can the FNIRSI FDM01 measure? The FDM01 measures sound levels from 30dB to 130dB. What is the measurement accuracy? The listed sound level accuracy is ±1.5dB under suitable measuring conditions. Does it support fast and slow response modes? Yes. The FDM01 supports fast and slow response rate selection for different noise changes. Can it measure temperature and humidity? Yes. In addition to sound level measurement, it also supports temperature and humidity detection. Does the meter shut down automatically? Yes. It includes an automatic shutdown function after 15 minutes to help save power.
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