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SoundTEK ST-120 Class 1 Sound Level Calibrator

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  • Projects sound at 94dB and 114dB for meter calibration
  • Meets IEC 60942 Class 1 standards for accuracy
  • Feedback system ensures constant, stable sound

rrp £395.00

now £284.00 (Ex. VAT) £340.80 (Inc. VAT)

rrp £395.00


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"Accurate to within 0.3dB at 94dB and to within 0.5dB at 114dB"

  • Description

    SoundTEK ST-120 Class 1 Sound Level Calibrator

    The SoundTEK ST-120 Class 1 Sound Level Calibrator is a highly accurate sound meter calibrator which allows the user to calibrate his/her own instruments without the need of a third party. It fits 1/2" microphones including those of the SoundTEK ST-107S and ST-109. Calibration is obviously very important and users can have confidence in the ST-120 because it conforms to the IEC 60942 Class 1 accuracy standard and is therefore in the upper tier of the industry’s rating system.

    With a feedback system to ensure a stable output, the ST-120 projects sound at 94dB to within ±0.3dB accuracy and at 114dB to within ±0.5dB accuracy. Decibels are a logarithmic scale where every 3dB represents a doubling in wave length amplitude so precise calibration is extremely important for accuracy in sound level meters.

    The product is pre-calibrated and batteries are included so it is ready to use straight out of the box.

    Key features

    • Calibrates 1/2" microphones
    • Feedback system ensures highly stable volume output
    • Accuracy meets IEC 60942 Class 1 requirements
    • Projects sound at 94dB and 114dB

    SoundTEK Meter Comparison Chart

      ST-105 ST-106 ST-107S ST-109
    IEC 61672-1-2002 Class 1  
    IEC 61672-1-2002 Class 2      
    128 Records Storage      
    37,000 Records Storage    
    24H Measurement
    1/1 Octave      
    1/3 Octave      
    Real time analysis      
    24H Measurement
    Micro-SD Slot    
    Compatible with SoundTEK ST-120 Class 1 Sound Calibrator (optional extra)
  • Specification

    • Standard: IEC 60942 (2003) and ANSI S1.40 (1984) Class 1
    • Sound Pressure Levels: 94dB and 114dB (reference of 2x10-5Pa)
    • Accuracy: ±0.3dB at 94dB, ±0.5dB at 114dB
    • Frequency: 1000Hz ± 1%
    • Distortion: ≤3%
    • Battery: 9V 006P or |EC6F22 or NEDA 1604
    • Dimension: ⌀ 62 x 134 mm
    • Weight: about 350g (included 1/2” adaptor and 9V battery)
    • Stable Times: 20s
    • Operating Temperature: 0ºC ~ 40ºC (32ºF ~ 104ºF)
    • Storage Temperature: 0ºC ~ 60ºC (32ºF ~ 140ºF)
    • Humidity: < 90%
    • Atmospheric Pressure: 64KPa ~ 100KPa
  • Supplied Accessories

    • SoundTEK ST-120 Class 1 Sound Level Calibrator
    • SoundTEK ST-120 Class 1 Sound Level Calibrator instruction manual
    • SoundTEK carry case
    • Calibration certificate
    • 1 x 9V battery
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