8930B Compact Sound Level Calibrator 114dB / 94dB / 104dB Calibration Level 13.2mm Cavity Diameter with LED Indicator

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Portable compact battery operated sound level calibrator suitable for many sound level meter.

When a microphone from a sound level meter is inserted into this calibrator, the sound level meter picks up the signal and displays the signal in dB (decibel) units. The sound level meter should be adjusted (if necessary) to match the calibrator's output signal as closely as possible

This calibrator provides a stable reference level across changes in many environmental conditions. Corrections for variations in atmospheric pressure are not required. The system enits the signa through the microphone cavity. An outer capillary hole balances the chamber static pressure protecting microphones from overpressure due to their insertion.


  • Meet IEC 60942:2018, class 2 standard
  • Stay accurate even in extreme humidity condition
  • Suitable for all sound leel meter with microphone head mechanical compliant with IEC 61094-1 or IEC 61094-4, such as 13.2mm
  • Calibration frequency at 1K Hz with three level 114dB, 94dB and 104dB
  • Vivid LED display with stability and low power indicator
  • Batery powered, easy to carry around


  • Calibration frequency: 1000Hz
  • Frequency accuracy: ±1.7%
  • Sound Pressure Level: 94dB / 104dB / 114dB
  • Sound Pressure accuracy: ±0.4dB
  • Stabilization time: 10 seconds
  • Total distortion: <3%
  • Ambient Condition Influence:
    • Temperature and humudity influence: <0.4dB @ 0...40°C and 25...90%RH
    • Static pressure influence: <0.1dB @65...108kPa
  • Stability levels
    • Short term stability (<60s): ±0.15dB
    • Stability after 1 year with normal use: ±0.35dB
  • Battery life time: 50hrs typical
  • LED indicator: 1 green/Red: ready/low power; 3 green: 114/101/94dB
  • Operating Environment: 0~40°C; 25~90%RH
  • Storage Environment: -20~50°C; <90%RH
  • Dimension: 60 x 130 x 37.5mm
  • Microphone head cavity diameter: 13.2mm
  • Weight: ~400gms
  • Battery: 2 x AA Alkaline battery

Set includes:

  • 1 x Sound Level calibrator
  • 2 x AA battery
  • English instruction manual
  • Standard Factory Packaging


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