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MQ-135 数据表(PDF) 2 Page - Hanwei Electronics Group Corporation |
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MQ-135 数据表(HTML) 2 Page - Hanwei Electronics Group Corporation |
2 / 3 page HANWEI ELCETRONICS CO.,LTD MQ-135 http://www.hwsensor.com TEL: 86-371-67169070 67169080 FAX: 86-371-67169090 E-mail: sales@hwsensor.com sensitive components. The enveloped MQ-135 have 6 pin ,4 of them are used to fetch signals, and other 2 are used for providing heating current. Electric parameter measurement circuit is shown as Fig.2 E. Sensitivity characteristic curve Fig.2 sensitivity characteristics of the MQ-135 this components, sensitivity adjustment is very necessary. we recommend that you calibrate the detector for 100ppm NH3 or 50ppm Alcohol concentration in air and use value of Load resistancethat( RL) about 20 KΩ(10KΩ to 47 KΩ). When accurately measuring, the proper alarm point for the gas detector should be determined after considering the temperature and humidity influence. 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 -20 -10 0 10 20 30 40 50 60 degree 33%RH 85%RH Fig.3 is shows the typical sensitivity characteristics of the MQ-135 for several gases. in their: Temp: 20℃、 Humidity: 65%、 O2 concentration 21% RL=20kΩ Ro: sensor resistance at 100ppm of NH3 in the clean air. Rs:sensor resistance at various concentrations of gases. Fig.4 is shows the typical dependence of the MQ-135 on temperature and humidity. Ro: sensor resistance at 100ppm of NH3 in air at 33%RH and 20 degree. Rs: sensor resistance at 100ppm of NH3 at different temperatures and humidities. Fig.4 MQ-135 0.1 1 10 10 100 1000 ppm A IR CO2 CO Alc ohol NH4 Tolueno Acetona SENSITIVITY ADJUSTMENT Resistance value of MQ-135 is difference to various kinds and various concentration gases. So,When using |
类似零件编号 - MQ-135 |
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类似说明 - MQ-135 |
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