Scantek offers the Castle Group’s redesigned Sonus pocket-sized sound level meter range. The Sonus line offers improved specifications, with combined sound- and dose-meter dual-frequency, data-logging to a sizeable memory, and measurements to support noise and environmental applications. The dual-frequency prevents repeat measurement and is suitable for hearing protection calculations. Other features include availability of 3 Ln percentile values; a crack-resistant plastic case housing; 30-140 dB range; measurement of two frequency weightings simultaneously; and fast, slow, and impulse time constants. Once measurements are taken, the data can be downloaded into Castle’s standard dBdata software for producing graphs and tables and for copying and pasting into standard software such as Microsoft Word or Excel.