Brüel & Kjær’s range of portable noise monitoring terminals are designed for shorter-term monitoring where portability, quick set-up and independent operation are important. The system is modular built up around All-weather Case Type 3535 and a contained measurement system based on the Type 2250/2250-L/2270 Hand-held Analyzers. The portable systems protect the instrumentation and peripherals against weather and unauthorised operation, provide power, and allow remote operation. The case is robust, and its contents well protected by foam inlays. The units are compact and light-weight, for convenient carrying and transportation. Extra battery power for long measurement durations is provided by two Li-Ion batteries, offering 5 times the energy efficiency of lead-acid batteries. External DC power may be connected to power the case contents. The instrumentation inside can also operate from mains power.
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