DatasheetsPDF.com

MQ7

Hanwei
Part Number MQ7
Manufacturer Hanwei
Description GAS SENSOR
Published Mar 27, 2011
Detailed Description HANWEI ELECTRONICS CO ., LTD MQ –7 http://www.hwsensor.com TECHNICAL DATA FEATURES * High sensitivity to carbon monox...
Datasheet PDF File MQ7 PDF File

MQ7
MQ7

Overview
HANWEI ELECTRONICS CO .
, LTD MQ –7 http://www.
hwsensor.
com TECHNICAL DATA FEATURES * High sensitivity to carbon monoxide * Stable and long life MQ-7 GAS SENSOR 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 Vc circuit voltage VH (H) Heating voltage (high) VH (L) Heating voltage (low) RL Load resistance RH Heating resistance TH (H) Heating time (high) TH (L) Heating time (low) PH Heating consumption b.
Environment conditions Symbol Tao Tas RH O2 Parameters Using temperature Storage temperature Relative humidity Oxygen concentration Technical condition 5V±0.
1 5V±0.
1 1.
4V±0.
1 Can adjust 33Ω±5% 60±1 seconds 90±1 seconds About 350mW Remark Ac or Dc Ac or Dc Ac or Dc Room temperature 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 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:10KΩ±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 symbol Rs а(300/100ppm) Standard working condition Preheat time www.
DataSheet4U.
com D.
Structure and configuration, basic measuring circuit Structure and configuration of MQ-7 gas sensor is shown as Fig.
1 (Configuration A or B), sensor composed by micro AL2O3 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:86-371-67169070 67169080 FAX:86-371-67169090 Email: sales@hwsensor.
com HANWEI ELECTRONICS CO .
, LTD MQ...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)