Technical Sharing—Installation of Oxygen Probes

Oxygen probes are primarily used to measure the oxygen partial pressure inside carburizing furnaces and vacuum furnaces. The typical operating temperature range is 700℃ to 950℃.

Applications of oxygen probes:
Oxygen probes are primarily used to measure the partial oxygen pressure inside carburizing furnaces and vacuum furnaces. The typical operating temperature range is 700℃ to 950℃.
Installation guidelines for oxygen probes:
If the oxygen probe is improperly installed, it can easily lead to carbon buildup on the probe, shorten its service life, and cause deviations in CP readings. This necessitates that the oxygen…
The probe installation requires the following conditions:
☆ The installation location is typically chosen in the furnace’s effective heating zone, where furnace gases are thoroughly stirred and mixed, facilitating easy installation and removal. Same as before.
Avoid installing in locations with particularly intense vibrations.
☆ Install it in a location that accurately represents the furnace atmosphere and is close to the workpiece. The furnace atmosphere should not contain vapors of low-melting-point metals.
☆ A place where Hefu gas does not come into direct contact, and where neither the undecomposed gas nor the decomposed gas in the infusion solution comes into direct contact.
☆ The oxygen probe should be positioned in a location that accurately reflects the furnace temperature, with its tip located near the workpiece but not in contact with it.
☆ Install in a location that is easy to maintain, whether vertical or horizontal. If the furnace body is equipped with flanges for installation, you can choose the flanged type.
☆ The detection port of the oxygen probe must face toward the center of the mixer, but it must not align with the mixer’s rotation direction.
☆ At an ambient temperature of 50℃ and a terminal temperature of 100℃, if the oxygen probe is moved from a low-temperature environment to a high-temperature environment, condensation is likely to form on the probe.
It should be left in a high-temperature environment for several hours before installation.
☆ During the furnace baking process, oxygen probes must absolutely not be installed in the new furnace, as the presence of vapors such as Si and Na in the atmosphere could cause the oxygen probe to deteriorate rapidly.
Rapid deterioration.
Simple steps for installing the oxygen probe:
Pre-drill holes at the most suitable locations on the furnace body and weld them securely using iron pipe sleeves with PT3/4 threads. Similarly, use the thermocouple...
The sleeve is installed within 100 mm of the oxygen probe, and then its associated accessories are securely mounted.