605-00009 Parallax Inc, 605-00009 Datasheet - Page 2

• Manufacturer Part Number: 605-00009
• Description: Flow Sensors LPG Gas Sesnsor
• Manufacturer: Parallax Inc

Specifications of 605-00009

• Supply Voltage: 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

micro AL
crust
sensitive components. The enveloped MQ-5 have 6 pin ,4 of them are used to fetch signals, and other 2 are used
for providing heating current.
SENSITVITY ADJUSTMENT
this components, sensitivity adjustment is very necessary. we recommend that you calibrate the detector for
1000ppm H
considering the temperature and humidity influence.
TEL: [phone] 67169080
HANWEI ELECTRONICS CO.,LTD
0.1
10
1
Electric parameter measurement circuit is shown as Fig.2
E. Sensitivity characteristic curve
Resistance value of MQ-5 is difference to various kinds and various concentration gases. So, When using
When accurately measuring, the proper alarm point for the gas detector should be determined after
100
-10
made by plastic and stainless steel net. The heater provides necessary work conditions for work of
2
Fig.2
O
2
3
1.5
1.4
1.3
1.2
1.1
0.9
0.8
0.7
0.6
0.5
or LPG concentration in air and use value of Load resistance ( R
ceramic tube, Tin Dioxide (SnO
1
sensitivity characteristics of the MQ-5
0
H2
LPG
CH4
CO
alcohol
Air
10
MQ-5
FAX: [phone]
20
MQ-5
1000
Temp
30
Fig.4
2
) sensitive layer, measuring electrode and heater are fixed into a
MQ-5
40
33%RH
85%RH
50
10000
ppm
Fig.4 is shows the typical dependence of
the MQ-5 on temperature and humidity.
Ro: sensor resistance at 1000ppm of H
33%RH and 20 degree.
Rs: sensor resistance at different temperatures
and humidities.
L
) about 20 KΩ(10KΩ to 47KΩ).
Fig.3 is shows the typical
sensitivity characteristics of
the MQ-5 for several gases.
Ro: sensor resistance at 1000ppm of
Rs:sensor resistance at various
http://www.hwsensor.com
in their: Temp: 20℃、
Humidity: 65%、
O
RL=20kΩ
H
concentrations of gases.
2
2
concentration 21%
in the clean air.
E-mail: [e-mail]
2
in air at