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Calibration
Gas
Readings stability within a temperature
range
Additional
variability due to
pressure
Additional
variability due to
humidity
CH4
± 0.1% vol. or ± 5% of readings (whichever is
greater) within the range of +20...+25 °C;
± 0.2% vol. or ± 30%
of readings
(whichever is greater)
at 100 kPa (test: 80
kPa, 100 kPa, 120
kPa)
± 0.2% vol. or ±
15% of readings
(whichever is
greater) at 40 °C
(test: 20% RH, 50%
RH, 90% RH)
± 0.2% vol. or ± 10% of readings (whichever is
greater) within the range of
-10...+20 °C and +25...+40 °C;
± 0.4% vol. or ± 20% of readings (whichever is
greater) within the range of
-40...-10 °C and +40...+60 °C.
C3H8
± 0.05% vol. or ± 5% of readings (whichever is
greater) within the range of +20...+25 °C;
± 0.1% vol. or ± 30%
of readings
(whichever is greater)
at 100 kPa (test: 80
kPa, 100 kPa, 120
kPa)
± 0.1% vol. or ±
15% of readings
(whichever is
greater) at 40 °C
(test: 20% RH, 50%
RH, 90% RH)
± 0.1% vol. or ± 10% of readings (whichever is
greater) within the range of
-10...+20 °C and +25...+40 °C;
± 0.2% vol. or ± 20% of readings (whichever is
greater) within the range of
-40...-10°C and +40...+60°C.
What is cross-sensitivity?
The gas detection sensor is usually affected by other gas. It meant the sensor not only measure the target gas but also
the other gases. If there is a concentration of additional gas, it would also cause a change in sensor output with a
factor listed in the below table.
1.3 Cross-Sensitivity Data