The Check Mate 140 from Galaxy Audio is a low cost, high performance IEC 651 Type II sound pressure level meter with MAX/MIN function, level range display, AC signal output, and a resolution of 0.1 dB.
electret condenser microphone, an accuracy of ±1.5 dB (ref 94dB @1KHz), selectable level ranges of Low = 35-80 dB, Med = 50-100 dB and Hi = 80-130 dB, frequency weightings A and C, and time weightings Fast and Slow. It also has an auxiliary AC signal output with a dynamic range of 50 dB and a frequency range from 31.5 Hz to 8 kHz.
