Combustible gas tester GM8800A response time: 2 seconds Warm-up time: about 60 seconds (25 ℃ hot bulb anemometer considerations, 60% RH environment) Continuous working time: 8 hours (with a slight change in working conditions) Low power indication : 3 ± 0.2V Operating temperature: 0 ~ 52 ℃ can detect control probe reset function Power indicator, alarm indicator function Power: 3 * 1.5V LR14 battery Size: 76 * 49 * 220MM TEUs Quantity: 20PCS Standard Box Size: 51.1 * 37.4 * 28.5CM TEU Gross: 14.4KG noise 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 ~ 130, 40 to 90 hot bulb anemometer works, 50 to 100, 60 to 110, 80 to 130 * Frequency weighting characteristic: A (an analog of the human ear) & C (mechanical self-noise) * Time characteristic selection: Fast / Slow speed response rate * Sampling Rate: 2 times / sec * Microphone: 1/2 inch condenser microphone * AC / DC signal output * max hold * Overload indication: OVER / UNDER notation * Low power display * Automatic shutdown / cancel automatic Off * Packing: PP box + box * Power: 1.5V AA Battery 4 or DC 6V 100mA DC power supply * Product size: 256 * 70 * 35 mm * Weight: 308 g (with battery) hot bulb anemometer Caution, hot bulb anemometer, Jinke instruments provided by the Qingdao Branch of the Instrument Co., Ltd. Qingdao Branch of the Instrument Co., Ltd. (www.qdjk17.com) strong, credible, in Qingdao, Shandong analytical instruments industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jinke instrument into the brilliant and you work for a better future!