... include laser distance meter,infrared thermometer, anemometer, sound level meter, noise meter, vibration meter, ultrasonic thickness gauge, film/coating thickness gauge, digital hygrothermograph, high voltage ... ModalTL1351StandardIEC651 TYPE2B. ANSI S1.4 TYPE2measuring range30~130 dBAaccuracy±1.5 dBdigit & resolution4 digits & 0.1 dBfrequency response31.5Hz ~8.5KHzmeasuring ...