PCE-428 Class 2 Data-Logging Sound Level Meter
Portable high-accuracy decibel meter with 1/1 octave band filter (optional 1/3 octave band filter upgrade)

The PCE-428 product is a state-of-the-art class 2 data-logging sound level meter that 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 includes a large easy-to-read illuminated LCD screen that effectively displays sound pressure level (SPL) readings numerically and graphically in real time. Thanks to the unit's  highly accurate and dependable octave band filtering, even the slightest difference in frequency is detected.

This versatile handheld meter also functions as a dependable data logger unit, recording measurements at an adjustable interval from 1 s ... 24 h and storing the recorded measurement data to a micro SD card memory. The unit's SD card can be removed from the meter device and manually inserted into the SD card reader of 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 has a measurement range from 25 ... 136 db(A) at a frequency of 20 Hz ... 12.5 kHz. The meter features A, B, C and Z frequency weightings as well as fast, slow and impulse time weightings. The PCE-428 decibel meter is commonly used by professionals to ensure compliance with environmental noise regulations and workplace noise permissible exposure limits.