Oxygen is one of the most required gas particles that needs accurate measurement and point of concentration. With this, a patient and different type of purposes can’t be fulfilled at any cost. Therefore, it would be the best way to come with right kind of oxygen sensor that can easily meet the industry needs.
When time comes to think about better oxygen sensor, it would
be the best approach to get all these things on right way and when the oxygen
is specially used in medical, it is important to know the above parameters for
betterment of the patient.
The O2 sensor works like a miniature
generator and produces its own voltage when it gets hot. Inside the vented
cover on the end of the sensor that screws into the exhaust manifold is a
zirconium ceramic bulb. The bulb is coated on the outside with a porous layer
of platinum. Inside the bulb are two strips of platinum that serve as
electrodes or contacts.
The outside part of the bulb is exposed
to the hot gases in the exhaust while the inside of the bulb is vented
internally through the sensor body to the outside atmosphere. Older style
oxygen sensors actually have a small hole in the body shell so air can enter
the sensor, but newer style O2 sensors "breathe" through their wire
connectors and have no vent hole. It's hard to believe, but the tiny amount of
space between the insulation and wire provides enough room for air to seep into
the sensor.
Venting the sensor through the wires
rather than with a hole in the body reduces the risk of dirt or water contamination
that could foul the sensor from the inside and cause it to fail. The difference
in oxygen levels between the exhaust and outside air within the sensor causes
voltage to flow through the ceramic bulb.
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