Extech 407730-NIST Digital Handheld Sound Level Meter

Extech 407730-NIST - NIST Calibration Certificate - Digital Sound Level Meter features: Analog bargraph with 50dB range updates every 40ms; ±2dB accuracy with 0.1dB resolution; A+C weighting; AC analog output; Record Max/Min values over time; Utilizes 0.5"(12.7mm) electret condenser microphone; 40 to 130dB measuring range.