Be confident in your purchase, we're an Authorized PCE Instruments Dealer. Highlights: Class 1 Measures from 22 - 136 db(A) at a frequency of 3 Hz - 20 kHz Portable Maximum accuracy 1/1 octave band filter (optional 1/3 octave band filter upgrade) The PCE 430 Class 1 Decibel Sound Meter (22 - 136dB) meets IEC 60651:1979, IEC 60804:2000, IEC 61672-1:2013, ANSI S1.4-1983 and ANSI S1.43-1997 requirements. This portable, high-accuracy sound level meter has a large easy-to-read light-up LCD screen that displays the sound pressure level (SPL) numerically graphically in real time. Thanks to octave band filtering, even the slightest difference in frequency is detected. This handheld sound meter also functions as a data logger, recording measurements at an adjustable interval from 1 s ... 24 h and storing the recorded measurement data to a micro SD card. The card can be removed from the meter and inserted into a PC. Alternatively, the decibel meter can be connected directly to a PC via USB. The provided PC-compatible software allows for quick and easy data analysis. This device measures from 22 ... 136 db(A) at a frequency of 3 Hz - 20 kHz. The meter features A, B, C and Z frequency weightings as well as fast, slow and impulse time weightings. The PCE-430 decibel meter is commonly used by professionals to ensure compliance with environmental noise regulations and workplace noise permissible exposure limits. Features: Accuracy class 1 A, B, C and Z frequency weightings Fast, Slow, Pulse and Peak time weighting Statistics function 1/1 octave band filter (optional 1/3 octave band filter upgrade) Display of the sound curve as a graph 3 measurement profiles adjustable Low inherent noise ICCP microphone 40 mV /PA Alarm level adjustable Adjustable data-recording interval from 1 s ... 24 h Real-time numerical and graphical LCD display Specifications: Measuring range: 22 ... 136 db(A) Accuracy: Class 1 Frequency range: 3Hz - 20 kHz Standards: GB/T 3785.1-2010 GB/T 3785.2-2010 IEC 60651:1979 IEC 60804:2000 IEC 61672-1:2013 ANSI S1.4-1983 ANSI S1.43-1997. Frequency analysis: 1/1 Octave band filter: 8 Hz - 16 kHz 1/3 Octave band filter: 6.3 Hz - 20 kHz Microphone: 1/2" Microphone Class: 1 Sensitivity: 40 mV/PA Frequency range: 3 Hz - 20 kHz Connection: TNC Power supply: ICCP Standard Data-logging interval: 1 s - 24 h (adjustable) Measuring functions: LXY (SPL), LXeq, LXYSD, LXSEL, LXE, LXYmax, LXYmin, LXPeak, LXN X = Frequency weighting: A, B, C, Z Y = Time weighting: F, S, I N = Statistics in %: 1 ... 99% Frequency weightings: A, B, C, Z Time weightings: Fast (F) 125ms, Slow (S) 1 sec, Impulse (I) 35 ms Inherent noise: Microphone: 19 db(A), 25 db(C), 31 db(Z) Electronics: 13 db(A), 17 db(C), 24 db(Z) AD converter: 24 Bit AD Sample rate: Standard: 48 kHz LN Mode: 20 ms Measuring display: Numerical Bar graph Graphical Display: 160 x 160 pixel LCD with backlight Memory: 4 GB Micro SD card Interface: USB (Memory readable via software or directly as mass storage) RS-232 Voltage output: AC 5V RMS DC 10 mV/db Alarm: Adjustable Power supply: 4 x 1.5V AA Batteries 12V / 1 A Power plug 5V / 1 A USB Battery life: Min. 10 h continuous use Dimensions: 70 x 300 x 36 mm / 2.76 x 11.81 x 1.42 in (W x H x D) Weight: Approx. 620 g / 1.4 lbs incl. batteries What's included: 1 x Environmental Meter PCE-430 1 x Microphone 1 x Wind noise suppressor (foam ball) 1 x USB cable 1 x PC software is a free download 1 x Power supply 1 x User manual 1 x Carrying case Note: This meter comes standard with a 1/1 octave band filter. An optional 1/3 octave band filter upgrade is available for an additional fee