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부품번호 | MQ-7 기능 |
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기능 | Gas Sensor | ||
제조업체 | Hanwei | ||
로고 | |||
전체 3 페이지수
www.DataSheet4U.com
HANWEI ELECTRONICS CO ., LTD
MQ –7
http://www.hwsensor.com
TECHNICAL DATA
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
Vc
VH (H)
VH (L)
RL
Parameter name
circuit voltage
Heating voltage (high)
Heating voltage (low)
Load resistance
Technical condition
5V±0.1
5V±0.1
1.4V±0.1
Can adjust
Remark
Ac or Dc
Ac or Dc
Ac or Dc
RH
TH (H)
TH (L)
PH
Heating resistance
Heating time (high)
Heating time (low)
Heating consumption
33Ω ±5%
60±1 seconds
90±1 seconds
About 350mW
Room temperature
b. Environment conditions
Symbol
Tao
Tas
RH
O2
Parameters
Using temperature
Storage temperature
Relative humidity
Oxygen concentration
c. Sensitivity characteristic
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%
symbol
Rs
а (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: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
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: [email protected]
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구 성 | 총 3 페이지수 | ||
다운로드 | [ MQ-7.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |