An oxygen sensor, (or lambda sensor), is an electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed.
It was developed by the Robert Bosch GmbH company during the late 1960s under the supervision of Dr. Günter Bauman. The original sensing element is made with a thimble-shaped zirconia ceramic coated on both the exhaust and reference sides with a thin layer of platinum and comes in both heated and unheated forms. The planar-style sensor entered the market in 1998 (also pioneered by Bosch) and significantly reduced the mass of the ceramic sensing element as well as incorporating the heater within the ceramic structure. This resulted in a sensor that started sooner and responded faster.
The most common application is to measure the exhaust gas concentration of oxygen for internal combustion engines in automobiles and other vehicles. Divers also use a similar device to measure the partial pressure of oxygen in their breathing gas.
Scientists use oxygen sensors to measure respiration or production of oxygen and use a different approach. Oxygen sensors are used in oxygen analyzers which find a lot of use in medical applications such as anesthesia monitors, respirators and oxygen concentrators.
Oxygen sensors are also used in hypoxic air fire prevention systems to monitor continuously the oxygen concentration inside the protected volumes.
There are many different ways of measuring oxygen and these include technologies such as zirconia, electrochemical (also known as Galvanic), infrared, ultrasonic and very recently laser methods. Each method has its own advantages and disadvantages.
Other articles related to "oxygen sensor, sensor, oxygen":
... Determining the condition of the oxygen sensor A malfunctioning oxygen sensor will result in air–fuel ratios which respond more slowly to changing engine ... A damaged or defective sensor may lead to increased fuel consumption and increased pollutant emissions as well as decreased power and throttle response ... Most engine management systems will detect a defective oxygen sensor ...
... An oxygen sensor, or lambda sensor, is an electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed ...
... An oxygen optode is a sensor based on optical measurement of the oxygen concentration ... an optical cable and the fluorescence properties of this film depend on the oxygen concentration ... Fluorescence is at a maximum when there is no oxygen present ...
... That is why the system is equipped with an oxygen sensor in the forward part of the exhaust system ... The sensor is connected to pin 23 in the ECU and is grounded in the ECU via pin 47 ... The exhaust fumes pass the oxygen sensor ...
... out of an petrol and diesel engine, as a gauge-type wideband digital oxygen sensor can be purchased for about the same price, or for a little more ... racers will use EGT gauges in combination with a wideband oxygen sensor to 'lean' the fuel ratio a bit to safely raise the temperature for more power ...
Famous quotes containing the word oxygen:
“All the oxygen of the world was in them.
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All the crotches of the angels of the world were in them.
All the morning kisses of Philadelphia were in them.”
—Anne Sexton (19281974)