Noise Dosimeter SV 104

SV 104 is a body-worn personal sound exposure meter (PSEM) that meets IEC 61252 ed1.2 (2017) and ANSI/ASA S1.25-1991 (R2020) performance requirements for personal noise dosimeters. With the listed accessories, it also meets IEC 61672-1:2013 Class 2 requirements for integrating-averaging sound level meters. Designed for full-shift assessments, the instrument integrates sound pressure over time to report dose (%), TWA(8), and LEX,8h/LEP,d for hearing-conservation and compliance reporting under ISO 9612, OSHA, MSHA, and ACGIH frameworks.

SV 104 logs A-weighted SPL and supports three independent profiles so exposure can be assessed under different settings (e.g., 2/3/4/5/6 dB exchange rate; Fast/Slow/Impulse). Typical measurement range is 55–140 dB. A patented ½″ MEMS microphone with lifetime warranty enables easy acoustic calibration and long-term stability.

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Personal Noise Dosimeters
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MEMS microphone
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OLED screen

Product Highlights

  • Standards conformity: IEC 61252 ed1.2 (2017) and ANSI/ASA S1.25-1991 (R2020); with listed accessories, meets IEC 61672-1:2013 Class 2.
  • Compliance metrics built-in: dose (%), TWA(8), and LEX,8h/LEP,d for hearing-conservation programs.
  • Concurrent profiles: three independent profiles for 2/3/4/5/6 dB exchange rates and Fast/Slow/Impulse time weightings.
  • Wide measurement range: 55–140 dB with time-history logging for daily exposure analysis.
  • Robust sensing: patented ½″ MEMS microphone with lifetime warranty for stable, repeatable calibration.
  • Good practice ready: supports pre/post field calibration and periodic accredited-lab certification for traceability.
  • Mounting guidance: clip the mic on the most-exposed shoulder, face upward, and use a windscreen outdoors.
  • Use case clarity: choose personal dosimetry for mobile/fluctuating noise; area monitoring for steady conditions.
  • Hazardous areas option: for explosive atmospheres, select the SV 104BIS intrinsically safe variant.

Noise dosimeter practical features

How to use a noise dosimeter

Wearable noise dosimeter

The primary purpose of a wearable noise dosimeter is to measure personal sound exposure close to the ear for compliance with ISO 1999 and ISO 9612, and with OSHA, MSHA, and ACGIH frameworks. Worn on the shoulder or collar (most-exposed side), SV 104 operates unattended, logging A-weighted SPL and time history. Automatic event detection and noise-source validation assist in identifying transient or task-based contributions. Mic placement and handling: clip the microphone on the most-exposed shoulder, face the inlet upward, keep it clear of clothing, and use a windscreen outdoors.

SV104 How to use SVANTEK

When to use a noise dosimeter

What factors determine the need for noise dose measurement?

Use personal dosimetry when workers are mobile or noise fluctuates; use area monitoring only where levels are steady and personnel are stationary. A dosimeter survey is recommended whenever exposure may reach or exceed an 8-hour threshold of 85 dBA, when processes or tooling change, or when the attenuation of current hearing protection needs verification.

SV104 When do you use noise dosimeters SVANTEK

Noise dosimeter calibration

Noise dosimeter calibration with an acoustic calibrator

Field calibration: before and after each survey, check sensitivity at the calibrator frequency using an acoustic calibrator; the SV 104 starts the auto-calibration routine automatically after the microphone is inserted. Traceability: schedule periodic calibration at an accredited laboratory in accordance with IEC 61252 and internal QA procedures to maintain documented measurement reliability.

SV104 Calibration SVANTEK

Noise dosimeter vs sound level meter

What is the difference between sound level meters and noise dosimeters?

Dosimeter: body-worn on the shoulder for full-shift personal exposure (dose, TWA(8), LEX,8h/LEP,d), ideal for mobile or variable tasks. Sound level meter: hand-held or tripod-mounted for spot measurements and diagnostics at locations or workstations. Specifications for both instruments typically correspond to IEC 61672-1 Class 2 performance.

SV104 Noise Dosimeter vs Sound Level Meter SVANTEK

Noise dosimeter accuracy

Noise dosimeter accuracy

SV 104 performance corresponds to Class 2 integrating-averaging requirements in IEC 61672-1 for an A-weighted SPL range of 55–140 dB and a nominal frequency range of 20 Hz–8 kHz. A built-in tri-axial accelerometer records shocks or handling events so spurious data can be flagged in the time history and excluded from dose calculations.

SV104 Accuracy SVANTEK

Noise Dose Calculation

The dedicated Supervisor pc software can help you calculate your noise exposure.

SV 104 logs personal exposure in three independent profiles so results can be reported simultaneously using different configurations (e.g., 2/3/4/5/6 dB exchange rate; Fast/Slow/Impulse). 100% dose represents the permissible daily exposure for the selected standard, and each exchange-rate step halves allowable time per equal-level increase (e.g., +3 dB at NIOSH vs +5 dB at OSHA). The Supervisor PC software imports SV 104 data to produce reports for ISO 9612, OSHA, MSHA, and ACGIH workflows, and to support hearing-protection selection.

SV104 Noise Dose Calculation SVANTEK

Noise Dosimeter Applications

Occupational Noise

Noise dosimeters conforming to IEC 61252 and ANSI S1.25-1991

Personal noise-exposure monitoring for hearing-conservation programs (ISO 9612 / OSHA 1910.95).

SV 104 is deployed for full-shift personal dosimetry where noise is mobile or task-varying—e.g., manufacturing lines, construction, mining, logistics, and utilities. Typical applications include baseline surveys, task-based studies, post-change assessments (new tools/processes), and verification that existing hearing protection provides adequate attenuation. Results feed ISO 9612 / OSHA / NIOSH reporting and guide selection of hearing protectors and administrative controls.

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SV104 Occupational Noise SVANTEK

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Personal noise dosimeters

Use of PC software

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    Specifications

    SV 104 – Noise Dosimeter

    Applications

    Sound measurements
    Occupational noise

    Hardware Features

    Number of channels
    1
    Intrisic safety
    Self-vibration detection
    Auto-calibration
    Keyboard lock
    Remote communication
    Bluetooth
    Communication Interfaces
    USB, infrared
    LED indicator
    Display
    Keyboard
    3 push buttons
    Memory
    8 GB
    Battery type
    Ni-MH rechargeable cells
    Operating time
    > 40 hours
    Operating temperature range
    -10 °C ÷ +50 °C
    Humidity range
    up to 95 % RH
    Weight
    121 g
    Size
    88 x 49.5 x 19.2 mm
    Docking station required

    Sound measurements features

    Standards
    IEC 61252 Ed 1.2 (R2017); ANSI S1.25-1991 (R2020)
    Microphone type
    ST 104C MEMS microphone
    Linear operating range to IEC 61672
    55 dBA RMS ÷ 140.1 dBA Peak
    Total measurement range
    50 dBA RMS ÷ 140.1 dBA Peak
    Frequency range
    20 Hz ÷ 10 kHz
    Weighting filters
    A, C and Z
    Time constants
    Slow, Fast, Impulse
    Exchange rates
    2, 3, 4, 5, 6
    Criterion levels
    selectable
    Profiles per channel
    3 with independent filters (x) and time constants (y)
    Min logging step
    1s logger step
    Statistics in octaves or third octaves
    Audio recording
    option
    Voice coments
    1/1 octave
    option

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