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ST-21D Class 2 Sound Level Meter

ST-21D Sound Level Meter meets the Class 2 IEC 61672:2013 standard, making it ideal for general environmental noise measurements. It calculates continuous sound levels and exposure over a set period, ensuring compliance with OSHA and Noise at Work regulations to protect employee hearing and safety.

Applicable Standards

  • ANSI/ASA S1.4/Part 1/IEC 61672-1

    Electroacoustics – Sound Level Meters – Part 1: Specifications (a nationally adopted international standard)

  • ANSI/ASA S1.4/Part 2/IEC 61672-2

    Electroacoustics – Sound Level Meters – Part 2: Pattern Evaluation Tests (a nationally adopted international standard)

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