SV 104A Personal Noise Dosimeter

The SV  104A is a personal noise dosimeter with a Bluetooth® communication supported by the Smartphone application called Assistant. For measurements of noise at work in accordance to ISO 9612 as well as OSHA, MSHA and ACGIH standards all settings are configurable in the PC software and can be stored in the dosimeter memory as setup files that can be selected directly from the dosimeter keyboard.


For more information on SV 104A Personal Noise Dosimeter or to request a quote, contact our team now:


The SV 104A dosimeter has a very robust MEMS microphone that has a lifetime warranty.  All vibrations that affect noise measurement results are detected by an inbuilt tri-axial vibration accelerometer and are marked in the results time history, so they can be easily excluded from dose calculations. Additionally, the accelerometer detects if dosimeter is not used by the worker and marks this information in time history.

We have designed the SV  104A to make noise dosimetry measurements easier. Firstly, the voice comment feature replaces necessity of identifying the dosimeter with a different type of stickers. Secondly, a single large measurement range of 53 dB to 141 dB enables measurement in all kinds of working environment. But mostly, the auto-calibration is what makes the SV  104A easy in use. Once the SV 104A detects a calibration signal, it calibrates automatically saving the calibration data together with the measurement file, before and after measurement.

The list of distinguishing features of SV  104A includes a colour OLED display that can be easily read even in a full daylight or in the dark. The user interface is very friendly to use which makes setting up and using the instrument easier than ever. The user may choose from multiple setup files that can be configured through the included Supervisor software. All measurement data are stored in the integral 8 GB memory which provides a vast amount of storage.

SV104A Technical Specifications

StandardsIEC 61252; ANSI S1.25-1991; Class 2: IEC 61672-1:2013
Weighting filtersA, C and Z
Time constantsSlow, Fast, Impulse
Exchange rates2, 3, 4, 5, 6
Measurement resultsLavg/Leq, SPL, Max, Min, SEL, SEL8, PSEL, LEPd, Dose (%), TWA, E, E_8h, Peak, Run Time, Upper Limit, Time (ULT), L(C-A), Projected Dose (D_8h)
Measurement profiles3
MicrophoneClass 2 microphone, 1/2″ MEMS type
Measurement range53 dBA RMS ÷ 141 dBA Peak
Frequency range20 Hz ÷ 10 kHz
Dynamic range98 dB
Data loggingSummary results for the measurement time
Time-history logging of Leq/Max/Min/Peak with 1s logger step
Voice commentsAudio records on demand, created before or after measurement, added to measurement file
Audio recordingAudio events recording, trigger and continuous mode, 12 or 24 kHz sampling rate, wav format (option)
1/1 octaveReal-time analysis in octave band filters, Class 1, IEC 61260
9 filters with centre frequencies from 31.5 Hz to 8 kHz (option)
1/3 octaveReal-time analysis in 1/3 octave band filters,Class 1 IEC 61260; 28 filters with centre frequencies from 20 Hz to 10 kHz (option)

Basic data

Display128 x 64 pixels OLED
Memory8 GB
InterfacesUSB 2.0 client, electrical contacts (new-type docking station compatible)
Long-range Bluetooth®, 4.0 Smart
Keyboard3 push buttons
Power supplyLi-Ion rechargeable cells: operation time > 48 hours1
USB interface 500 mA HUB
Environmental conditionsTemperature from -10 oC to 50 oC
Humidity up to 95 % RH, non-condensed
Dimensions 88 x 49.5 x 19.2 mm
Weight121 grams with batteries

 1depends on instrument settings

*Continuous product development and innovation are the policy of our company. Therefore, we reserve the right to change the specifications without prior notice.


Health & Safety

From the Noise at Work Act to the Physical Agents Directive (Vibration) we have instrumentation to ensure you stay within the law.