The SV 33B is a class 1 sound calibrator that produces a reference level acoustic pressure of 114 dB at a frequency of 1 kHz. The SV 33B is suitable for calibrating Class 1 and Class 2 sound level meters and dosimeters with 1/2″ microphones.

The SV 33B uses a built-in reference piezoresistive sensor to monitor level, pressure and temperature sensors generated for atmospheric condition measurements and a microprocessor system that controls calibrator operation.

A sinusoidal waveform with a frequency of 1 kHz is generated digitally and fed to the loudspeaker. The sample signal from the reference piezoresistive sensor indicates the current generated signal level in the feedback loop. Based on information about the signal level, actual pressure and temperature values, the microprocessor adjusts the loudspeaker signal amplification to produce a suitable sound pressure level in the calibrator chamber.

Product Details


    Calibration Signal Parameters:
  • Sound Pressure Level (SPL) : 114 dB
  • IEC 60942:2017 Accuracy : Class 1
  • SPL Tolerance : +0.25 dB
  • Frequency Tolerance : 0.2%
  • Total Harmonic Distortn (THD) : < 0.75%
  • General Information:
  • Effective Load Volume Sensitivity : 0.00027 dB / mm3
  • Level Stabilisation Time : typically 15 s, max 30 s
  • Calibrated Microphones : 1/2” and 1/4″ with SA 30 adapter
  • Storage Temperature Range : -25°C / +70.°C
  • CE Classification : EN 61010-1: 2010, EN 61326-1:2013, IEC 60942:2017
  • Working Conditions:
  • Temperature Range : from -10 °C to +50 °C(related SPL error < £0.15 dB)
  • Atmospheric Pressure Range : from 65 kPa to 108 kPa(related SPL error < £0.10 dB)
  • Humidity Range : from 25 % to 90 % RH(related SPL error < £0.05 dB)

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Frequently Asked Questions

Can we find the PT HAS product on the e-catalogue (LKPP) ?

Absolutely, almost all PT HAS products can be found in the e-catalogue.

How about the warranty for products from PT HAS ?

PT HAS Supply’s products include a 1-year official warranty for damage caused by manufactured defects.

Has the PT HAS product been calibrated? What if the calibration period is over?

Products from PT HAS have been calibrated and are ready to use. For further calibration, PT HAS already has a calibration lab that is ISO 17025 accredited and is ready to help customers who need recalibration.

What if the product has a problem and needs repair?

PT HAS has a local service center (in Jakarta), and our technicians are trained in the manufacture of the products we are agents for. For repairs and troubleshooting, we try to do it locally. and we make sure that the spare parts we supply are official spare parts from manufacturers.

Do we get training on using the tool after making a purchase at PT Has?

For all product purchases at PT HAS, usage training is included and is unlimited.

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