• Type 1 to IEC 60651 and IEC 60804.
• Measurement Range: 20 to 140 dB(A).
• Suitable for residential areas.
• Well protected against vandalism.
• Built into a standard tilting mast.
• Noise event detection templates.
• Multiple environmental measurement groups.
• Integrated weather sensors option.
• Direct, modem or GSM link support.

The CR:243/4 is suitable for most long term environmental noise monitoring applications. The noise processor is enclosed in the tilting mast, with the microphone mounted on top. Due to the nature of the mast, it is suitable for installation in residential areas where obtrusive masts and large boxes are not wanted. Not only is the mast difficult to vandalize, but it tends not to attract attention in the first place.

If used, the event recognition templates can be used to identify noise events such as aircraft, road traffic, trains, etc.

At the same time as the instrument is measuring noise events the CR:243/4 has three environmental noise measuring groups running. These can be configured by the user.

The unit also stores short Leq samples every second up to a period of seven days (circular store). This data can be used for recalculation of most acoustic parameters using the Acoustic Editor software.

Various Windows based programs are available to communicate with the CR:243/4, offering varying levels of automation and reporting facilities.

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