Rion NL-27 Sound Level Meter

Standard compliance
+ JIS C 1509-1: 2005 Class 2
+ IEC 61672-1: 2013 Class 2  
+ CE mark (EMC Directive 2004/108/EC, 2014/30/EU)
+ WEEE Directive
Measurement functions
+ Sound level LP
+ Equivalent continuous sound level Leq
+ Sound exposure level Le
+ Maximum sound level Lmax
+ Peak sound level Lcpeak
Measurement time settings: 1 min, 5 min, 10 min, 1 h
Microphone: 1/2 inch electret condenser microphone Model: UC-52,  sensitivity level: -33 dB ± 3 dB (re.1 V/Pa)
Measurement level range (normal mode)
+ A-weighting: 30 dB to 137 dB
+ C-weighting: 36 dB to 137 dB
Linear operation range (A-weighting, 1 kHz): 30 dB to 137 dB
Peak sound level measurement range: 65 dB to 140 dB
Measurement frequency range: 20 Hz to 8 kHz
Calibration    
+ Calibration frequency: 1 kHz
+  Calibration sound level: 94 dB  
Numeric display: 0.1 dB resolution
Bar graph: Scale range 100 dB
Number of data: 199  Stored data can be checked on recall screen
DC output: 3 V (full scale), 25 mV/dB, output impedance: 50 Q Load impedance: 10 kOhm
AC output: 1 Vrms +600 -400 mVrms (at 110 dB), overload: +2dB Output impedance: 600 Q, load impedance: 10 kQ or more,
Dimensions, weight: Approx.  (120mm(H) x 63(W) x 23.5mm(D)/ 105 g (with batteries)
Proccessing: Lp, Leq, LE, Lmax, Lcpeak.
Supplied accessories: Storage case x 1, cover x 1, Windscreen fall prevention rubber x 1, strap x 1, AAA (EC RO3)  alkaline batteries x 2