* Frequency range: 20Hz to 20 kHz
* Weightings: A, C, & Z
* Time weighting: fast & slow.
* Measurement ranges: A-weighting 25 to 138dB, C-weighting 33 to 138dB, Z-weighting 38 to 138dB. Peak sound level 141dB
* Measurement functions include: instantaneous sound level pressure (Lp), equivalent continuous sound pressure level (Leq), sound exposure level (Le), maximum & minimum (Lmax/Lmin), percentile sound pressure level (Ln) [up to 5 values].
* Additional functions including Lceq, Lcpeak, Lzpeak, Laieq, Laimax, Latm5 etc
* 3 LCD screen for set-up and graphical display of results.
* Manual or auto storage to internal memory or to SD card
* Delay time: Specified start time after start button pushed or on user trigger point exceeded
* Built-in help system
* Alkaline batteries (24h operation)
* Supplied with Pulsar 105 field calibrator
Also included:
* NX-42RT option for real-time 1/1 Octave and 1/3 Octave band analysis
* NX-42RV option for reverberation time measurement calculations at T20/T30, or user defined intervals. Reverberation time-decay curves can be saved.