605-00007 Parallax Inc, 605-00007 Datasheet
605-00007
Manufacturer Part Number
605-00007
Description
Flow Sensors CO Gas Sensor
Manufacturer
Parallax Inc
Datasheet
1.605-00007.pdf
(3 pages)
Specifications of 605-00007
Supply Voltage
5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Symbol
Vc
V
V
R
R
T
T
PH
Symbol
Tao
Tas
RH
O
symbol
Rs
а(300/100ppm)
Standard working
condition
Preheat time
HANWEI ELECTRONICS CO ., LTD
TECHNICAL DATA
industry or car.
b. Environment conditions
c. Sensitivity characteristic
sensor composed by micro AL
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
H (H)
H (L)
L
H
H
H
2
D. Structure and configuration, basic measuring circuit
(L)
(H)
SPECIFICATIONS
TEL:86-371-67169070 67169080
FEATURES
APPLICATION
Structure and configuration of MQ-7 gas sensor is shown as Fig. 1 (Configuration A or B),
A. Standard work condition
They are used in gas detecting equipment for carbon monoxide(CO) in family and
Parameters
Using temperature
Storage temperature
Relative humidity
Oxygen concentration
* High sensitivity to carbon monoxide
* Stable and long life
Parameter name
circuit voltage
Heating voltage (high)
Heating voltage (low)
Load resistance
Heating resistance
Heating time (high)
Heating time (low)
Heating consumption
Parameters
Surface resistance
Of sensitive body
Concentration slope rate
Temperature -20℃±2℃ relative humidity 65%±5% RL:10KΩ±5%
No less than 48 hours
Vc:5V±0.1V
2
O
3
Technical conditions
-20℃-50℃
-20℃-50℃
Less than 95%RH
21%(stand condition)
the oxygen concentration can
affect the sensitivity
characteristic
ceramic tube, Tin Dioxide (SnO
FAX:86-371-67169090
VH:5V±0.1V
Technical condition
5V±0.1
5V±0.1
1.4V±0.1
Can adjust
33Ω±5%
60±1 seconds
90±1 seconds
About 350mW
Technical parameters
Detecting range:
MQ –7
20ppm-2000ppm carbon monoxide
Less than 0.5
2-20k
VH:1.4V±0.1V
MQ-7
Remark
Advice using scope
Minimum value is over 2%
2
) sensitive layer, measuring
Email: sales@hwsensor.com
Remark
In 100ppm
Carbon Monoxide
Rs (300ppm)/Rs(100ppm)
http://www.hwsensor.com
Remark
Ac or Dc
Ac or Dc
Ac or Dc
Room temperature
GAS SENSOR
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605-00007 Summary of contents
Page 1
HANWEI ELECTRONICS CO ., LTD TECHNICAL DATA 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 ...
Page 2
HANWEI ELECTRONICS CO ., LTD 6 pin ,4 of them are used to fetch signals, and other 2 are used for providing heating current. Heating voltage 5v (High) 60s Vc Heating voltage 1.4v (Low) 90s Electric parameter measurement circuit is ...
Page 3
HANWEI ELECTRONICS CO ., LTD MQ-7 1.5 1.4 1.3 1.2 1.1 1 0.9 0.8 0.7 0.6 0.5 - OPERATION PRINCIPLE . The surface resistance of the sensor Rs is obtained through effected voltage signal output of the load ...