Datasheet

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Fig8.Pin Schematic Diagram
2 .Following conditions should be avoided
2.1 Water Condensation
Indoor conditions, slight water condensation will influence sensors’ performance lightly. However, if water
condensation on sensors surface and keep a certain period, sensors’ sensitive will be decreased.
2.2 Used in high gas concentration
No matter the sensor is electrified or not, if it is placed in high gas concentration for long time, sensors
characteristic will be affected. If lighter gas sprays the sensor,it will cause extremely damage.
2.3 Long time storage
The sensors resistance will driftreversibly if it’s stored for long time without electrify, this drift is related with
storage conditions. Sensors should be stored in airproof bag without volatile siliconcompound. For the
sensors with long time storage but no electrify, they need long galvanical aging time for stabilitybefore using.
The suggested aging time as follow:
Stable2.
Storage Time
Suggested aging time
Less than one month
No less than 48 hours
1 ~ 6 months
No less than 72 hours
More than six months
No less than 168 hours
2.4 Long time exposed to adverse environment
No matter the sensors electrified or not, if exposed to adverse environment for long time, such as high
humidity, high temperature, or high pollution etc., it will influence the sensors’ performance badly.
2.5 Vibration
Continual vibration will result in sensors down-lead response then break. In transportation or assembling line,
pneumatic screwdriver/ultrasonic welding machine can lead this vibration.
2.6 Concussion
If sensors meet strong concussion, it may lead its lead wire disconnected.
2.7 Usage Conditions
Protuberance Mark
Pin 1&2 is heating electrode,
Pin 3&4 is measuring electrode.