MQ135

www.DataSheet4U.com HANWEI ELCETRONICS CO.,LTD MQ-135 http://www.hwsensor.com TECHNICAL DATA MQ-135 GAS SENSOR FEATURES Wide detecting scope Fast response and High sensitivity Stable and long life Simple drive circuit APPLICATION They are used in air quality control equipments for buildings/offices, are suitable for detecting of NH3,NOx, alcohol, Benzene, smoke,CO2 ,etc. SPECIFICATIONS A. Standard work condition Symbol Vc VH RL RH PH Symbol Tao Tas RH O2 Parameter name Circuit voltage Heating voltage Load resistance Heater resistance Heating consumption Technical condition 5V±0.1 5V±0.1 can adjust 33Ω ±5% less than 800mw Technical condition -10℃…+45℃ -20℃…+70℃ less than 95%Rh 21%(standard condition)Oxygen concentration can affect sensitivity Technical parameter 30KΩ -200KΩ (100ppm NH3 ) ≤ 0.65 Vc:5V±0.1 Vh: 5V±0.1 Remarks AC OR DC ACOR DC Room Tem B. Environment condition Parameter name Using Tem Storage Tem Related humidity Oxygen concentration Remarks minimum value is over 2% Remark 2 Detecting concentration scope： 10ppm-300ppm NH3 10ppm-1000ppm C. Sensitivity characteristic Symbol Rs Parameter name Sensing Resistance Concentration Slope rate Temp: 20℃±2℃ Humidity: 65%±5% α (200/50) NH3 Standard Detecting Condition Preheat time Benzene 10ppm-300ppm Alcohol Over 24 hour D. Structure and configuration, basic measuring circuit 1 2 3 4 5 6 7 8 9 Parts Gas sensing layer Electrode Electrode line Heater coil Tubular ceramic Anti-explosion network Clamp ring Resin bas...