Figaro TGS2611-C00 TGS 2611 Gas Sensor For LP Gases Methane (Ø x H) 9.2 mm x 7.8 mm TGS2611-C00 Hoja De Datos

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TECHNICAL INFORMATION FOR TGS2611

2-2   Temperature and humidity dependency

Figure 6 shows the temperature and humidity
dependency of TGS2611.  The Y-axis shows the ratio
of sensor resistance in 5000ppm of methane under
various atmospheric conditions (Rs) to the sensor
resistance in 5000ppm of methane at 20˚C/65%RH
(Ro).

0.1

1

10

-20

-10

0

10

20

30

40

50

35%RH
50%RH
65%RH
95%RH

Rs/Ro

Ambient temperature (˚C)

Gas: 5000ppm methane

0.1

1

10

100

1000

10000

-10˚C
20˚C/65%RH
40˚C/95%RH

Rs/Ro

Gas concentration (ppm)

Fig. 6 - Temperature and humidity dependency (Rs/Ro)

Fig. 7 - Resistance change ratio

under various ambient conditions

Table 1 - Temperature and humidity dependency

(typical values of Rs/Ro for Fig. 6)

Table 1 shows a table of values of the sensor’s
resistance ratio (Rs/Ro) under the same conditions
as those used to generate Figure 6.

Figure 7 shows the sensitivity curve for TGS2611 to
methane under several ambient conditions. While
temperature may have a large influence on absolute
Rs values, this chart illustrates the fact that effect on
the slope of sensor resistance ratio (Rs/Ro) is not
significant. As a result, the effects of temperature on
the sensor can easily be compensated.

For economical circuit design, a thermistor can be
incorporated to compensate for temperature (for
additional information on temperature compensation in
circuit designs, please refer to the Technical Advisory
‘Technical Information on Usage of TGS Sensors for Toxic
and Explosive Gas Leak Detectors’).

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