SV 104A Noise Dosimeters

The SV 104A is a compact personal noise dosimeter built for workplace noise exposure monitoring and hearing conservation programme compliance. It features a patented ST 104CIS MEMS microphone with lifetime warranty and built-in triaxial vibration sensor for artifact detection. Three independent measurement profiles allow simultaneous monitoring under different regulatory standards (OSHA, MSHA, ACGIH), while Bluetooth® 4.0 connectivity enables remote readout via the ASSISTANT PRO mobile app without disturbing the worker. A colour OLED display, IP 65 rating, and over 48 hours of battery life make it suitable for demanding industrial environments. Optional firmware add-ons for octave-band analysis and triggered audio recording extend its capability for detailed occupational hygiene investigations.

Key Specifications

• MEMS microphone with lifetime warranty
• 20 Hz–10 kHz frequency range
• 43–141 dBA operating range
• A/C/Z weighting
• Exchange rates 2/3/4/5/6 dB
• Bluetooth 4.0
• IP 65
• >48 h battery
• 8 GB memory
• 121 g
• built-in triaxial vibration sensor

Applications

• Occupational noise exposure assessment
• Hearing conservation programmes
• Industrial hygiene
• Regulatory compliance (OSHA/MSHA/ACGIH)
• Workplace health and safety

Standards & Certifications

IEC 61252 Ed 1.2 (R2017), ANSI S1.25-1991 (R2020) Class 2, IEC 61672-1:2013, ISO 9612, OSHA 29 CFR 1910.95, MSHA, ACGIH