1.IEC,ANSI standard 2.measuring range 30~130 ... 1. IntroductionWe are a developing,design,manufacturing and sales integrated company. Our products include laser distance meter,infrared thermometer, anemometer, sound level meter, noise meter, vibration meter ... ANSI S1.4 TYPE2measuring range30~130 dBAaccuracy±1.5 dBdigit & resolution4 digits & 0.1 dBfrequency response31.5Hz ~8.5KHzmeasuring range30~130 ...