Sound Level Meter GM1357 design criteria:. ---- A standard international committee IEC651 TYPE2 ---- B American National Standard ANSI S1.4 TYPE2 * Measuring range:. ---- 30 ~ 130 dBA ---- 35 ~ 130 dBC * Accuracy: ± 1.5 dB * Digital & Resolution: 5 & 0.1 dB * Frequency response: 31.5Hz ~ 8.5KHz * measuring gear: 30 to 130, 40 to 90 noise meter price, 50 to 100, 60 ~ 110 noise meter supplier, 80 to 130 * Frequency weighting characteristic: A (an analog of the human ear) & C (mechanical self-noise) * Time characteristic selection: fast / slow reaction rates * Sampling Rate: 2 times / sec * Microphone: 1 / 2-inch capacitive microphone * AC / DC signal output * max hold * Overload indication: OVER / UNDER notation * Low power display * Automatic shutdown / cancel automatic shutdown * Packing: PP box + box * Power: 1.5V 4 AA batteries or DC 6V 100mA DC power supply * Product size: 256 * 70 * 35 mm * Weight: 308 g (with battery) use folding Edit this paragraph noisemeter correct or not directly affect the accuracy of measurement results sex. When the measurement, the instrument should be selected according to the situation is good right position, hands flat grip noise measurement noise with sound level meter, according to the sensitivity of the response headers can be divided into four categories: 1, "slow." Meter time constant of 1000ms, - as stationary noise proof for measuring noise meter, the measured value is a valid value. 2, "fast." Meter time constant is 125ms, typically used for measuring fluctuations are not stationary noise and traffic noise. Fast file close to the human ear response to sound. 3, "pulse or pulse to keep." Hands rise time is 35ms, for measuring long duration pulse noise, such as punching, press hammer, the measured value for the maximum RMS. 4, "peak hold." Handles rise time of less than 20ms. Pulse sound measurement for a very short duration, such as guns, cannons and explosions, the measured value is the peak. That is the maximum. Rangefinder investment line of laser altimeter instrument Level meter gauge flat instrument GPS waveform recorder test fixture voltage and current loggers dataset recorder chart recorder Flow Totalizer instrument. Portable noise meter _ Branch of the Instrument (Online) _ noise meter supplied by the Qingdao Branch of the Instrument Co., Ltd. Qingdao Branch of the Instrument Co., Ltd. (www.qdjk17.com) is in Qingdao, Shandong analysis instruments leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Branch of the Instrument in leadership with the staff warmly welcome all inquiries negotiations to create the Branch of the Instrument better future.