Analog Carbon Monoxide Sensor [MQ7]

ZHIWEI ROBOTICS Co.
Analog Carbon Monoxide Sensor (MQ7) Introduction The MQ7 is a simple-to-use Carbon Monoxide (CO) sensor suitable for sensing CO concentrations in the air. It can detect CO-gas concentrations anywhere from 20 to 2000ppm. The sensitivity can be adjusted by the potentiometer. Specification - Power supply needs: 5V - Interface type: Analog - Pin Definition: 1-Output 2-GND 3-VCC - High sensitivity to carbon monoxide - Fast response - Stable and long life -Size: 40x20mm Shipping List - Carbon Monoxide Sensor (MQ7) 1unit
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Внешний вид Analog Carbon Monoxide Sensor [MQ7]

Технические характеристики

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Тип технологии
Тип детектируемого газа
Диапазон измерения
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HANWEI ELECTRONICS CO ., LTD MQ –7 TECHNICAL DATA http://www.hwsensor.com MQ-7 GAS SENSOR FEATURES * High sensitivity to carbon monoxide * Stable and long life APPLICATION They are used in gas detecting equipment for carbon monoxide(CO) in family and industry or car. SPECIFICATIONS A. Standard work condition Symbol Parameter name technical condition Remark Vc circuit voltage Ac or Dc 5V 0.1 VH (H) Heating voltage (high) Ac or Dc 5V 0.1 VH (L) Heating voltage (low) Ac or Dc 1.4V 0.1 RL Load resistance Can adjust RH Heating resistance Room temperature 33 5% T H (H) Heating time (high) 60 1 seconds T H (L) Heating time (low) 90 1 seconds PH Heating consumption Less than 330mw b. Environment conditions Symbol Tao Tas RH O2 Parameters Using temperature Storage temperature Relative humidity Oxygen concentration Technical conditions -20 -50 -20 -50 Less than 95%RH 21%(stand condition) the oxygen concentration can affect the sensitivity characteristic Remark Advice using scope Minimum value is over 2% c. Sensitivity characteristic symbol Rs (300/100ppm) Standard working condition Preheat time Parameters Technical parameters Remark Surface resistance In 100ppm Of sensitive body 2-20k Carbon Monoxide Concentration slope rate Less than 0.5 Rs (300ppm)/Rs(100ppm) Temperature -20 2 relative humidity 65% 5% RL:10K 5% Vc:5V 0.1V VH:5V 0.1V VH:1.4V 0.1V No less than 48 hours Detecting range: 20ppm-2000ppm carbon monoxide D. Structure and configuration, basic measuring circuit Structure and configuration of MQ-7 gas sensor is show n as Fig. 1 (Configuration A or B), sensor composed by micro AL 2O3 ceramic tube, Tin Dioxide (SnO2) sensitive layer, measuring electrode and heater are fixed into a crust made by plastic and stainless steel net. The heater provides necessary work conditions for work of sensitive components. The enveloped MQ-7 have TEL:86-371-5333098 5333099 FAX:86-371-5333090 Email: sensor@371.net PDF
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MQ-7.PDF

Дата модификации: 20.03.2006

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