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
Los códigos de productos
TGS2611-C00
Revised
02/05
7
TECHNICAL INFORMATION FOR TGS2611
2-5 Gas response
Figures 10a and 10b show the change pattern of
sensor resistance (Rs) for TGS2611 when the sensor
is inserted into and later removed from 5000ppm of
methane.
sensor resistance (Rs) for TGS2611 when the sensor
is inserted into and later removed from 5000ppm of
methane.
As these charts display, the sensor’s response speed to
the presence of gas is extremely quick, and when
removed from gas, the sensor will recover back to its
original value in a short period of time. Compared to
TGS2611-C00, TGS2611-E00 shows slower response
due to the airflow resistance of the sensor’s filter layer.
the presence of gas is extremely quick, and when
removed from gas, the sensor will recover back to its
original value in a short period of time. Compared to
TGS2611-C00, TGS2611-E00 shows slower response
due to the airflow resistance of the sensor’s filter layer.
Figure 11 demonstrates the sensor’s repeatability by
showing multiple exposures to a 5000ppm
concentration of methane. Unlike the test done for
Fig. 10, here the sensor is located in a single
environment which is exchanged periodically. As a
result, though the process of gas diffusion reduces
sensor response speed, good repeatability can be
seen.
showing multiple exposures to a 5000ppm
concentration of methane. Unlike the test done for
Fig. 10, here the sensor is located in a single
environment which is exchanged periodically. As a
result, though the process of gas diffusion reduces
sensor response speed, good repeatability can be
seen.
2-6 Initial action
Figure 12 shows the initial action of the sensor
resistance (Rs) for a sensor which is stored unenergiz-
ed in normal air for 90 days and later energized in
clean air.
resistance (Rs) for a sensor which is stored unenergiz-
ed in normal air for 90 days and later energized in
clean air.
The Rs drops sharply for the first seconds after
energizing, regardless of the presence of gases, and
then reaches a stable level according to the ambient
atmosphere. Such behavior during the warm-up
process is called “Initial Action”.
energizing, regardless of the presence of gases, and
then reaches a stable level according to the ambient
atmosphere. Such behavior during the warm-up
process is called “Initial Action”.
Since this ‘initial action’ may cause a detector to alarm
unnecessarily during the initial moments after
powering on, it is recommended that an initial delay
circuit be incorporated into the detector’s design (refer
to Technical Advisory ‘Technical Information on Usage
of TGS Sensors for Toxic and Explosive Gas Leak
Detectors’). This is especially recommended for
intermittent-operating devices such as portable gas
detectors.
unnecessarily during the initial moments after
powering on, it is recommended that an initial delay
circuit be incorporated into the detector’s design (refer
to Technical Advisory ‘Technical Information on Usage
of TGS Sensors for Toxic and Explosive Gas Leak
Detectors’). This is especially recommended for
intermittent-operating devices such as portable gas
detectors.
Fig. 10a - Gas response to methane of TGS2611-C00
Fig. 11 - Repeatability
Fig. 12 - Initial action
0.1
1
10
100
Rs(k
Ω
)
Time (min.)
air
air
methane
5000ppm/air
0
1
2
3
4
5
6
1
10
100
0
5
10
15
20
25
Rs(k
Ω
)
Time (min.)
in gas
in gas
in gas
in gas
in gas
0.1
1
10
100
0
2
4
6
8
10
Rs(k
Ω
)
Time (min.)
in air
Power on
Fig. 10b - Gas response to methane of TGS2611-E00
0.1
1
10
100
0
1
2
3
4
5
6
Rs(k
Ω
)
Time (min.)
air
air
methane
5000ppm/air