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Class 1 portable noise monitoring system

04 August 2009

Brüel & Kjær has launched the 3535 ‘All-weather Case’ to protect un-manned equipment. A compact and light-weight enclosure for the noise monitoring system, includes a sound level meter and outdoor microphone.

Class 1 portable noise monitoring system
Class 1 portable noise monitoring system

The combination of the 2250 Noise analyser and 4952 Outdoor microphone are Type-approved to provide Class 1 measurements to IEC 61672-1:2002.

This ensures that the measurement system complies with the minimum requirements of accuracy for unattended noise measurement, a consideration often overlooked in portable noise monitoring systems.
Two small slim-line Lithium Ion battery packs provide the power to operate all equipment inside the case. The Lithium Ion battery has five times more power-to-weight ratio than equivalent lead-acid batteries traditionally used in similar systems.

High speed, internet based communication is provided by one of the 3G or GPRS modems supported in the case design, allowing remote data retrieval and monitoring of the real-time noise levels. Events are instantly e-mailed or sent by SMS text message to the user’s PC or mobile phone.

The 3535 supports the SDHC high capacity standard for SD memory cards, which allow up to 32GB of data storage on one SD card offering the convenience of long periods between data retrieval tasks, with the flexibility to store long duration, high quality sound recordings to enhance assessment.

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