SET Pulse Oximetry

Masimo and the Birth of SET® Pulse Oximetry

With competitive price and timely delivery, SHINDARY sincerely hope to be your supplier and partner.

Joe Kiani, Founder and CEO of Masimo, established the company precisely to address the common limitations of pulse oximeters through the use of adaptive signal processing. The solution, Masimo SET® Measure-through Motion and Low Perfusion&#; pulse oximetry, was born.

Since its introduction, Masimo SET® has been shown in more than 100 independent and objective studies to outperform other pulse oximetry technologies.1 Today, Masimo SET® is used at top hospitals worldwide to monitor more than 200 million patients each year.2,3

Oxygen Analyzer Measurement Systems and Their Advantages and Drawbacks

The measurement system of the oxygen analyzer we currently sell is as follows.

Zirconia type measurement system:

• Concentration cell system: ZR22G/ZR802, ZR202G, ZR202S and OX400
• Limiting Current type: OX100 and OX102

Magnetic type measurement system:

• Paramagnetic system: MG8G and MG8E

Tunable Diode Laser measurement system:

• Tunable Diode Laser measurement system: TDLS, TDLS, TDLS

Since each measurement system has its own advantages and drawbacks, it is important to select an oxygen analyzer that is appropriate for your application and intended use. Below is an overview of each measurement system and its advantages and drawbacks.

Zirconia type measurement system

Concentration cell system

A solid electrolyte like zirconia exhibits conductivity of oxygen ions at high temperature. As shown in the figure below, when porous platinum electrodes are attached to both sides of the zirconia element to be heated up and gases of different partial oxygen concentrations are brought into contact with the respective surfaces of the zirconia, the device acts as an oxygen concentration cell. This phenomenon causes an electromotive force to be generated between both electrodes according to Nernst&#;s equation.

Advantages

• Can be directly installed in a combustion process such as a boiler&#;s flue and requires no sampling system. And response is faster (ZR22G, ZR202G).
• Capable o f measuring trace oxygen concentration (OX400).

Drawbacks

• If the sample gas contains a flammable gas, a measurement error occurs (combustion exhaust gas causes almost no problem because it is completely burned).

Limiting Current type

As shown in the figure below, if the flow of oxygen into the cathode of a zirconia element heated to high temperature is limited, there appears a region where the current becomes constant even when the applied voltage is increased. This limited current is proportional to the oxygen concentration.

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Advantages

• Capable of measuring trace oxygen concentration.
• Calibration is required only on the span side (air).

Drawbacks

• If the sample gas contains a flammable gas, a measurement error occurs.
• The presence of dust causes clogging of the gas diffusion holes on the cathode side; a filter must be installed in a preceding stage.

Magnetic type measurement system

Paramagnetic system

This is one of the methods utilizing the paramagnetic property of oxygen. When a sample gas contains oxygen, the oxygen is drawn into the magnetic field, thereby decreasing the flow rate of auxiliary gas in stream B. The difference in flow rates of the two streams, A and B, which is caused by the effect of flow restriction in stream B, is proportional to the oxygen concentration of the sample gas. The flow rates are determined by the thermistors and converted into electrical signals, the difference of which is computed as an oxygen signal.

Advantages

• Capable of measuring flammable gas mixtures that cannot be measured by a zirconia oxygen analyzer.
• Because there is no sensor in the detecting section in contact with the sample gas, the paramagnetic system can also measure corrosive gases.
• Among the magnetic types, the paramagnetic system offers a faster response time than other systems.
• Among the magnetic types, the paramagnetic system is more resistant to vibration or shock than other systems.

Drawbacks

• Requires a sampling unit corresponding to the sample gas properties or applications.

Tunable Diode Laser measurement system

Tunable Diode Laser measurement system

Tunable Diode Laser (or TDL) measurements are based on absorption spectroscopy. The TruePeak Analyzer is a TDL system and operates by measuring the amount of laser light that is absorbed (lost) as it travels through the gas being measured. In the simplest form a TDL analyzer consists of a laser that produces infrared light, optical lenses to focus the laser light through the gas to be measured and then on to a detector, the detector, and electronics that control the laser and translate the detector signal into a signal representing the gas concentration.
Gas molecules absorb light at specific colors, called absorption lines. This absorption follows Beers law.
TDL Analyzers are effectively infrared analyzers which obey the Beer- Lambert Law.

I = Io e-EGL
where I is the radiation intensity after absorption
Io is the initial radiation intensity
E is the extinction coefficient
G is the gas concentration
and L is the path length of the measurement area

Yokogawa Electric&#;s model : TDLS

Advantages

• Capable of measuring a number of nearinfrared absorbing gases in difficult process applications.
• Capability of measuring at very high temperature, high pressures and under difficult conditions (corrosive, aggressive, high particulate service).
• Most applications are measured in-situ, reducing installation and maintenance costs.
• Most measurements are rapid (5 seconds) and interference free.

Drawbacks

Contact us to discuss your requirements of Mg Auto Spare Parts. Our experienced sales team can help you identify the options that best suit your needs.

• Initial installation for the mounting flange is required.