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The new CEL-400 series is an advanced and comprehensive instrument family for a wide range of applications. It has been designed for convenience and ease of use in many popular tasks. From simple workplace noise surveys to full community noise audits the new CEL-400 can do it quickly and easily.

Advanced digital signal processing technology enable the meters in the range to cover the whole audible sound range in a single span. This eliminates the need to select the best range for a measurement since everything is covered from the quietest quiet to the loudest loud.

The main role of the CEL-490 is as an environmental instrument for longer-term community noise applications. This model adds the LN% statistical measurement parameters required for many environmental regulations and these can be calculated in real time in both broadband and frequency bands on the relevant versions. The CEL-490 also adds more comprehensive data logging functions in the form of period time intervals selectable from 10 milliseconds to 1 hour as well as time history profile recording. Automatic start and stop timers are standard functions on the CEL-490 and with the companion outdoor microphone enclosure system it can be used for unattended monitoring.