Sound Level Meters

Sound level meters are handheld electronic devices that take acoustic measurements. They provide readings on the noise level in an environment and usually return a measurement in decibels (dB). Sound level meters are also called decibel meters or noise meters.

Most meters feature an integrated digital display and some have an inbuilt datalogging memory to store readings. Many models can be attached to a smartphone or tablet and the data easily shared. Some models need connecting to a computer to export data.

What is the difference between Class 1 and Class 2?

There are two classes of sound meter; Class 1 and Class 2 (also referred to as Type 1 or Type 2). Sound level meters are given a classification of I or II depending on which international standard they meet. Type 1 or Class 1 sound meters are used for incredibly precise noise measurements (such as in laboratories) as they are able to measure the smallest sound levels. Class 2 sound level meters are usually used in workplaces for assessing and measuring noise.

What is weighting?

Weighting refers to the frequency range that is measured. Some sound meters will only measure one frequency range, while other models are able to measure all.

  • A frequency covers a 20 Hz to 20 kHZ range. However, the sound is cut from the lower and higher ends of the spectrum in order to approximate the frequency that is audible to the human ear.
  • C frequency can measure much higher noise levels, but still covers the frequency heard by the human ear.
  • Z frequency covers the whole frequency range between 10Hz to 20 kHZ, ±1.5dB.
  • Should I calibrate my sound level meter?

    Considering a calibration service your sound level meter will ensure that it always returns the most accurate measurements. It provides you with absolute confidence that your instrument works as expected with the highest accuracy.

    What is a dosimeter?

    Sound level meters measure the noise within a whole environment whereas dosimeters measure personal exposure to noise. Dosimeters (or dosemeters) are typically attached to an individual at work to monitor noise levels.

    Why would I use a sound level meter?

    Sound level meters will give you measurements on the level of noise within an environment. High noise levels can damage hearing, cause hearing loss and can have a detrimental effect on health. With a reading from a sound meter, you can make sure that you have the correct measures in place (such as slowing down machinery to minimise excess noise) and appropriate PPE (Personal Protective Equipment) to minimise risk.


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    Description Price Maximum Sound Level Minimum Sound Level Resolution Accuracy Class DOSE Measurement Weighting Display Type Battery Type Calibrated Fast/Slow Time Averaging Data Logging Interface Type Maximum Frequency Maximum Operating Temperature
    RS Stock No. 479-2028
    Mfr. Part No.GA113
    BrandCastle
    £455.40
    Each
    Units
    140dB 35dB 0.1 dB IEC 60651:1979 Type 1, IEC 61252:1993, IEC 61672-1:2002 Class 1, IEC60804:2001 Type 1 Yes A, C LCD - Backlit 9V - Both - - 20kHz +40°C
    RS Stock No. 909-1884
    Mfr. Part No.GA216B
    BrandCastle
    £440.00
    Each
    Units
    140dB 35dB 0.1 dB - Yes A, C LCD Alkaline, PP3 - Both Yes - 20kHz -
    RS Stock No. 921-3075
    Mfr. Part No.GA216B
    BrandCastle
    £509.00
    Each
    Units
    140dB 35dB 0.1 dB - Yes A, C LCD Alkaline, PP3 RSCAL Both Yes - 20kHz -
    RS Stock No. 909-1923
    Mfr. Part No.GA116E
    BrandCastle
    £1,030.12
    Each
    Units
    133dB 19dB - - Yes A, C, Z LCD Alkaline, PP3 - Both Yes USB - +50°C
    RS Stock No. 921-3104
    Mfr. Part No.GA116E
    BrandCastle
    £1,099.12
    Each
    Units
    133dB 19dB - - Yes A, C, Z LCD Alkaline, PP3 RSCAL Both Yes USB - +50°C
    RS Stock No. 447-7381
    Mfr. Part No.GA213
    BrandCastle
    £540.43
    Each
    Units
    140dB 35dB 0.1 dB IEC 60651:1979 Type 2, IEC 61672-1:2002 Class 2 - A, C LCD - Backlit 9V - Both - - 20kHz +40°C
    RS Stock No. 908-5173
    Mfr. Part No.GA116I
    BrandCastle
    £845.47
    Each
    Units
    140dB 35dB - - Yes A, C - - RSCAL - Yes USB 20kHz -
    RS Stock No. 909-3742
    Mfr. Part No.GA116I
    BrandCastle
    £776.47
    Each
    Units
    140dB 35dB - - Yes A, C - - - - Yes USB 20kHz -
    RS Stock No. 447-9630
    Mfr. Part No.GA215
    BrandCastle
    £438.67
    Each
    Units
    140dB 35dB 0.1 dB IEC 60651:1979 Type 2, IEC 60804:2001 Type 2, IEC 61672-1:2002 Class 2 - A, C LCD - Backlit 9V - Both - - 20kHz +40°C
    RS Stock No. 908-5167
    Mfr. Part No.GA216I
    BrandCastle
    £585.61
    Each
    Units
    140dB 35dB - - Yes A, C LCD Alkaline, PP3 RSCAL Both Yes USB 20kHz -
    RS Stock No. 909-3733
    Mfr. Part No.GA216I
    BrandCastle
    £516.61
    Each
    Units
    140dB 35dB - - Yes A, C LCD Alkaline, PP3 - Both Yes USB 20kHz -
    RS Stock No. 909-1897
    Mfr. Part No.GA257B
    BrandCastle
    £396.00
    Each
    Units
    140dB 67dB - - Yes A LCD Alkaline, PP3 - - Yes USB 20kHz -
    RS Stock No. 921-3081
    Mfr. Part No.GA257B
    BrandCastle
    £465.00
    Each
    Units
    140dB 67dB - - Yes A LCD Alkaline, PP3 RSCAL - Yes USB 20kHz -
    RS Stock No. 447-9646
    Mfr. Part No.GA256
    BrandCastle
    £326.04
    Each
    Units
    140dB 75dB 0.1 dB IEC 61252:1993 Yes A, C LCD - Backlit 9V - Both - - 20kHz +40°C
    RS Stock No. 908-5195
    Mfr. Part No.GA116L
    BrandCastle
    £1,052.53
    Each
    Units
    143dB 29dB - - Yes A, C, Z LCD Alkaline, PP3 RSCAL Both Yes USB - +50°C
    RS Stock No. 909-3749
    Mfr. Part No.GA116L
    BrandCastle
    £983.53
    Each
    Units
    143dB 29dB - - Yes A, C, Z LCD Alkaline, PP3 - Both Yes USB - +50°C
    RS Stock No. 908-5189
    Mfr. Part No.GA216L
    BrandCastle
    £741.94
    Each
    Units
    143dB 29dB - - Yes A, C, Z LCD Alkaline, PP3 RSCAL Both Yes USB - +50°C
    RS Stock No. 909-3745
    Mfr. Part No.GA216L
    BrandCastle
    £672.94
    Each
    Units
    143dB 29dB - - Yes A, C, Z LCD Alkaline, PP3 - Both Yes USB - +50°C