Svantek » Products » SV 104BIS – Intrinsically safe noise dosimeter

Intrinsically safe noise dosimeter SV 104BIS

SV 104 BIS is a Class 2 personal noise dosimeter certified for use in explosive atmospheres. It combines a robust MEMS microphone with intrinsic safety in accordance with ATEX and IECEx, making it ideal for monitoring worker noise exposure in hazardous industrial environments. The dosimeter measures noise levels from 53 dBA Leq to 143 dBA Peak, logs data with high resolution, and records 1/1 or 1/3 octave bands and audio events for detailed post-analysis.

Bluetooth® connectivity enables real-time data preview on mobile devices using the Assistant app, while the built-in triaxial vibration sensor ensures traceable and accurate results, even during movement or misuse. With a life-time warranty on the microphone and up to 45 hours of operation on a single charge, the SV 104 BIS offers long-term reliability and performance for noise exposure assessments aligned with ISO 9612, OSHA, MSHA, and ACGIH standards.

ATEX, IECEx

new model

patented

Highlights

Certified for explosive environments, compliant with ATEX and IECEx for use in hazardous zones.
Patented MEMS microphone with life-time warranty and integrated auto-calibration (TEDS).
Real-time Bluetooth® preview, allowing remote data access and alarms via smartphone app.
Simultaneous octave and audio recording (options), enabling noise source identification and hearing protector selection.
Built-in vibration sensor, detecting misuse and ensuring result integrity.
45-hour runtime, supported by fast USB charging and docking station options.

Practical Features in Use

Intrinsic Safety for Hazardous Environments

Certified noise monitoring designed for explosive atmospheres

SV 104BIS is an intrinsically safe personal noise dosimeter, designed for use in explosive-risk environments such as mines, refineries, and chemical plants. Certified under ATEX and IECEx, the device meets international standards for intrinsic safety by limiting electrical and thermal energy to prevent ignition.

MEMS microphone with lifetime warranty

Rugged design for reliable, long-term performance

SV 104BIS uses a patented MEMS microphone designed for tough industrial environments. Its solid-state build ensures shock resistance, low power use, and stable sensitivity. Backed by a lifetime warranty, it delivers accurate, maintenance-free noise measurements for years.

Noise source recognition

Real-time analysis and audio logging for better insight

The SV 104BIS offers optional 1/1 or 1/3 octave band analysis and simultaneous audio recording, enabling detailed identification of noise sources. This dual approach supports accurate selection of hearing protectors and provides context for critical noise events during post-analysis.

Mobile app support

Remote access, live preview, and limit alerts via Bluetooth®

The SV 104BIS connects via Bluetooth® to the Assistant mobile app, allowing users to preview real-time noise levels, control measurement sessions, and receive alerts when noise limits are exceeded—all without interrupting the worker.

Standards compliance and accuracy

Full alignment with Class 2 and occupational noise standards

The SV 104BIS meets ANSI S1.25, IEC 61252, and IEC 61672 Class 2 requirements, ensuring high accuracy in industrial noise measurements. It supports ISO 9612, OSHA, MSHA, and ACGIH methodologies, recording Leq, Max, Min, Peak values alongside DOSE, TWA, and Lav with dual time-history logging for detailed exposure analysis.

Auto-calibration feature

Accurate, user-independent setup with built-in calibration memory

The SV 104BIS features an auto-calibration system enabled by a TEDS-equipped MEMS microphone, which stores calibration data directly in the microphone. This eliminates manual setup errors, ensures traceable accuracy, and streamlines field use by automatically recognizing calibration parameters during setup.

Intrinsic Safety for Hazardous Environments

Certified noise monitoring designed for explosive atmospheres

MEMS microphone with lifetime warranty

Rugged design for reliable, long-term performance

Noise source recognition

Real-time analysis and audio logging for better insight

Mobile app support

Remote access, live preview, and limit alerts via Bluetooth®

Standards compliance and accuracy

Full alignment with Class 2 and occupational noise standards

Auto-calibration feature

Accurate, user-independent setup with built-in calibration memory

Intrinsically Safe Noise Dosimeter

The SV 104BIS is the latest intrinsically safe noise dosimeter from Svantek, featuring a rugged MEMS microphone with lifetime warranty, Bluetooth® interface for real-time preview, and 8 GB memory for long-term measurements. A new docking station ensures fast and reliable data transfer, streamlining workflow in hazardous environments.

Download Catalogue (PDF)

Applications

Occupational Noise

Compliant measurements across all workplace standards

The SV 104BIS supports noise exposure monitoring in accordance with ISO 9612, OSHA, MSHA, ACGIH, and the EU Noise Directive. Its wide 100 dB dynamic range (from 53 dBA Leq to 143 dB Peak) ensures accurate assessment in diverse industrial environments, from low-level exposure to extreme noise events.

Videos

New generation of noise dosimeters

Audio recording, measurement in octaves and MEMS microphones changed the noise dosimetry measurements

Application of the dosimeter in practice

An example of the use of a noise dosimeter during a sports event with high noise levels

Noise dosimeter configuration

A quick way to configure measurement parameters for noise measurement at workplaces

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Specifications

SV 104BIS – Intrinsically safe noise dosimeter

Applications

Sound measurements

Occupational noise

Hardware Features

Number of channels

Intrisic safety

Self-vibration detection

Auto-calibration

Remote system check

Keyboard lock

Remote communication

Bluetooth

Communication Interfaces

Bluetooth, Electrical contacts (docking station required)

LED indicator

Display

Keyboard

3 push buttons

Memory

8 GB

Battery type

Li-Ion rechargeable cell

Operating time

45 hours

Operating temperature range

-10 °C ÷ +50 °C

Humidity range

up to 90 % RH

Weight

117 g

Size

88 x 49.5 x 19.2 mm

IP rate

IP 65

Docking station required

Sound measurements features

Standards

IEC 61252 Ed 1.2 (R2017); ANSI S1.25-1991 (R2020); Class 2 IEC 61672-1 Ed 2.0 (R2013)

Type approvals

Yes

Microphone type

ST 104B MEMS

Preamplifier type

Integrated

Linear operating range to IEC 61672

53 dBA RMS ÷ 143 dBA Peak

Total measurement range

46 dBA RMS ÷ 143 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

4 with independent settings of filters (x) and time constants (y)

Min logging step

Statistics in octaves or third octaves

Audio recording

option

Voice coments

1/1 octave

option

1/3 octave

option