The class I digital sound level meter code 980.601 is a professional instrument for measuring sound levels in workplaces, production departments, workshops, laboratories, technical rooms and areas where noise from machines, systems, equipment or environmental sources must be checked. Class I makes it suitable for more demanding and documentable measurements where greater data reliability is required than with instruments intended only for indicative checks.

The sound level meter allows measurements with A and C weighting. A weighting is used to assess noise in a way that is close to the sensitivity of the human ear and is therefore suitable for environmental sound level checks, noise exposure evaluations, acoustic comfort and workplace inspections. C weighting is useful for checking noise generated by machines, systems and sources with stronger sound components, providing an evaluation more suitable for technical and industrial applications.

The instrument works with dB ranges of 30 - 80, 50 - 100 and 80 - 130, allowing the measurement to be adapted to different sound pressure levels. These measuring ranges make it possible to check both relatively quiet environments and louder sources such as machines, compressors, extraction systems, tools, motors, fans, production lines and operating equipment. The 0.1 dB resolution allows detailed reading of sound level variations.

The frequency range from 31.5 to 16,000 Hz covers a broad spectrum suitable for most professional acoustic applications. This allows analysis of noise generated by very different sources, from low-frequency sounds produced by motors and ventilation systems to higher components generated by tools, mechanical processing, pneumatic systems or production equipment.

Accuracy is specified according to frequency, with reference to 0.03, 0.06, 0.12, 0.25, 0.5, 1, 2, 4 and 8 kHz bands and values expressed in dB±. This information is important because, in sound level measurements, accuracy may vary depending on the frequency of the analysed signal. These data help the technician correctly interpret measurements and use them more consciously in acoustic checks.

The included 8 GB micro SD card allows measured data to be stored for later analysis, measurement comparison, technical reports or internal documentation. Data recording is particularly useful for long-term checks, monitoring machines during operating cycles, checking production departments under different working conditions or documenting maintenance and noise reduction activities.

The RS232/USB output allows the instrument to be connected to external systems or to a computer for data management. This function is useful when measurements need to be transferred, archived, processed or integrated into quality control, safety, maintenance or environmental analysis procedures. The possibility of downloading data makes the sound level meter suitable for repeated checks and documented monitoring over time.

The sound level meter is powered by 6 x 1.5 V AA batteries included, a practical solution for field use, workshop checks, plant inspections or environments where direct power supply is not available. Its portability allows the technician to move easily between different measuring points, approach the sound source and check several areas within the same environment.

In industrial applications, the sound level meter can be used to check noise from machine tools, presses, compressors, extraction systems, fans, pumps, motors, production lines, working areas and departments where operators are present. In HSE and occupational safety, it is useful for preliminary noise exposure assessments, identifying critical sources, comparing before and after soundproofing work and checking the effectiveness of barriers, covers, acoustic panels or system modifications.

For reliable measurements, it is important to correctly select A or C weighting, set the range according to the expected sound level, keep the instrument correctly positioned in relation to the source, avoid interference caused by wind, impacts or reflections and record the operating conditions of the machine or environment during measurement. For official measurements or periodic comparisons, a consistent and repeatable measurement procedure is recommended.

The class I digital sound level meter code 980.601 is therefore a professional solution for measuring, recording and analysing noise in technical and industrial contexts. The combination of class I, A and C weighting, 8 GB micro SD card, 0.1 dB resolution, 31.5 - 16,000 Hz range, measuring ranges up to 130 dB, RS232/USB output and battery operation makes it suitable for maintenance, safety, quality control, acoustic checks, environmental analysis and monitoring of noise produced by machines and systems.