Environmental Instruments : Rion NL-21

Rion NL-21

Complies with existing IEC standards and the new IEC61672-1 standard (Class 2).
No range switching required due to the 100 dB wide dynamic range.
Simultaneous measurement of equivalent continuous sound pressure level Leq, percentile levels(LN), Maximum levels (Lmax),etc.
Graph display for sound level fluctuations and back erase function.
Backlit LCD screen for high-visibility display.
One 128 MB Compact Flash card provides up to 10 days of Lp readings taken every 100 ms.
Timer function for automatic measurement over extended periods.
Dual-measurement function allows setting level determination.
Comparator output function allows setting level determination.
Expansion features, including a range of filter settings, are provided by filter cards.
Power failure compensation function when the AC adapter or external battery pack is used.

Specifications
Applicable standards	IEC60651: 1979 Type 2 IEC60804: 1985 Type 2 IEC61672-1 Class 2
Measurement functions	Sound level (Lp) Equivalent continuous sound pressure level (Leq) Sound exposure level (LE) Maximum (Lmax) and Minimum (Lmin) sound pressure level Percentile sound pressure level (LN)(5 selectable settings)
Measurement range	A weighting: 28-138dB C weighting: 33-138dB Flat: 38-138dB Peak sound level: 141dB
Frequency range	20-8000 Hz (including microphone)
Time weighting	Fast, Slow, Impulse (Impulse is selectable only for auxiliary processing functions)
Microphone	1/2-inch pre-polarized condenser type UC-52
Display	Backlit LCD panel (128 X 64 dots+121 icons)
Internal memory	Manual, Auto (Auto store is possible only when the optional CF card is inserted.)
Power requirement	Four IEC R6 (size "AA") batteries AC adapter NC-34 series (option)
Battery-life	32 hours
Dimensions and weight	260 (L) X 76 (W) X 33 (D) mm Approx. 400 g (incl. batteries)