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

4

TECHNICAL INFORMATION FOR TGS2611

2-1   Sensitivity to various gases

Figure 4a and 4b show the relative sensitivity of
TGS2611 to various gases.  The Y-axis shows the ratio
of the sensor resistance in various gases (Rs) to the
sensor resistance in 5000ppm of methane (Ro).

For TGS2611-C00, the sensitivity to ethanol, which
may act as an interference gas, is lower compared
with that of methane. However, TGS2611-E00 shows
significantly less sensitivity to alcohol than TGS2611-
C00 while showing no significant difference in
sensitivity to methane.

Using the basic measuring circuit illustrated in Fig. 2,
and with a matched R

L

 value equivalent to the Rs value

in 5000ppm of methane will provide sensor output
voltage (V

RL

) change as shown in Figure 5.

:

All sensor characteristics in this technical brochure
represent typical sensor characteristics.  Since the Rs
or output voltage curve varies from sensor to sensor,
calibration is required for each sensor (for additional
information on calibration, please refer to the Technical
Advisory ‘Technical Information on Usage of TGS Sensors
for Toxic and Explosive Gas Leak Detectors’).

0.1

1

10

100

100

1000

10000

100000

Rs/Ro

Gas concentration (ppm)

Air

Ethanol
Hydrogen

Methane

Iso-butane

0

1

2

3

4

0

2000

4000

6000

8000

10000

12000

VRL (v)

Gas concentration (ppm)

Air

Ethanol

Iso-butane

Methane

Hydrogen

Fig. 4a - Sensitivity to various gases (Rs/Ro) of TGS2611-C00

Fig. 5 - Sensitivity to various gases (V

RL

) of TGS2611-C00

0.1

1

10

100

100

1000

10000

100000

Rs/Ro

Gas concentration (ppm)

Air

Ethanol

Hydrogen

Methane

Iso-butane

Fig. 4b - Sensitivity to various gases (Rs/Ro) of TGS2611-E00