Revised
08/03
1
APPLICATION NOTES FOR TGS2611
Application Notes for Methane Gas Detectors using TGS2611
The TGS2611 methane gas sensor
has been presorted into
groupings which will allow users
to simplify the manufacturing
process for methane gas
detectors. This brochure offers
example application circuits and
important technical advice for
designing and manufacturing gas
detectors which use classified
TGS2611 sensors.
Page
Introduction......................................................................................................2
Detector Circuit Design
Basic Circuit with Temperature Compensation............................................2
Selecting a Load Resistor.................................................................................2
Compensation for Internally Generated Heat..............................................3
Heater Breakage Detection Circuit.........................................................3
Sensor Malfunction Detection Circuit.........................................................3
Prevention of Intermittent Alarming..............................................................4
Alarm Prevention during Warmup................................................................4
Alarm Delay Circuit..........................................................................5
Application Circuit...................................................................................5
Manufacturing Process
Handling and Storage of Sensors..........................................................5
R
L
Selection...............................................................................................5
PCB Assembly....................................................................................5
Sensor Assembly..................................................................................5
Final Assembly.................................................................................................6
Preheating of Final Assembly.....................................................................6
Gas Test..............................................................................................6
Storage of Finished Products..........................................................................6
Anticipated Performance at 10%LEL of Methane...........................................................6
Pre-calibrated Sensor Module...........................................................................................7
Appendix...............................................................................................................8
See also Technical Brochure ‘Technical Information on Usage of TGS
Sensors for Toxic and Explosive Gas Leak Detectors’.
an ISO9001 company
IMPORTANT NOTE:
OPERATING CONDITIONS IN WHICH FIGARO SENSORS ARE USED
WILL VARY WITH EACH CUSTOMER’S SPECIFIC APPLICATIONS. FIGARO STRONGLY
RECOMMENDS CONSULTING OUR TECHNICAL STAFF BEFORE DEPLOYING FIGARO
SENSORS IN YOUR APPLICATION AND, IN PARTICULAR, WHEN CUSTOMER’S TARGET
GASES ARE NOT LISTED HEREIN. FIGARO CANNOT ASSUME ANY RESPONSIBILITY
FOR ANY USE OF ITS SENSORS IN A PRODUCT OR APPLICATION FOR WHICH SENSOR
HAS NOT BEEN SPECIFICALLY TESTED BY FIGARO.
TGS2611-J00 is a UL recognized component in accordance with the
requirements of UL2075.
Please note that component recognition testing
has confirmed long term stability in 60ppm of methane; other characteristics
shown in this brochure have not been confirmed by UL as part of component
recognition.
