18 TX9165-UM-EN-07
1.7.1.3 Carbon Dioxide/Methane Gases • Infrared Sensor
This sensor is highly specific to the selected gas and exhibits
consistent sensing accuracy with superior long-term stability.
The linear response means that it can be calibrated for low gas concentrations and
high concentrations up to 100% by volume.
TX6350
.243 .245 .242 .278 .279
Methane
CH
4
Methane
CH
4
Methane
CH
4
Carbon
Dioxide
CO
2
Carbon
Dioxide
CO
2
Sensing
element
Infrared
Sensing range
0 to 5%
v/v
0 to 100%
LEL
0 to 100%
v/v
0 to 5%
v/v
0 to 100%
v/v
Zero drift
±0.05% v/v
per month
±1% LEL per
month
±0.5% v/v
per month
±0.5% v/v
per month
±1% v/v per
month
Repeatability
±0.1% v/v ±2% LEL ±2% v/v ±0.05% v/v ±2% v/v
Response
time T63%
<15 secs
Response
time T90%
<30 secs
Operating life
<5 years
Relative
humidity
15 to 90% condensing
Operating
temperature
-10 to +40°C
GENERAL alarm
1.25% v/v 10% LEL 25% v/v 1.25% v/v 25% v/v
HIGH alarm
2.5% v/v 20% LEL 50% v/v 2.5% v/v 50% v/v
Checkpoint
Carbon Dioxide Sensors - Normal atmosphere contains carbon dioxide which
will affect the sensor signal so nitrogen gas must be used to accurately calibrate
the zero value. The sensor should be powered-up and the nitrogen applied for at
least 5 minutes to ensure that the sensor has stabilised.
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