Sampling and Testing Probes: These probes introduce the gas to be measured into the zirconia detection chamber through a guide tube, then measure by heating the zirconia to operating temperature using a heating element. The probe is not limited by gas temperature and can detect oxygen content in various temperature environments. However, it has a relatively complex structure and slower response, making it suitable for low gas temperature or high cleanliness environments, such as oxygen measurement in laboratories and nitrogen generators.

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