... meter, vibration meter, ultrasonic thickness gauge, film/coating thickness gauge, digital hygrothermograph, high voltage megohmmeter, ground resistance tester, electric leakage switch ... .1 dBfrequency response31.5Hz ~8.5KHzmeasuring range30~130, 40~90, 50~100, 60~110, 80~130frequency weightingA(simulative ear)sampling frequencytwice ...