Platinum has been used in many industries for centuries. It’s not surprising, then, that it also finds its way into the construction of platinum resistance thermometers. Platinum resistance thermometers are often used to measure temperature, and they do this by measuring the electrical current caused by a difference in temperatures. Read on to understand why platinum is used in the making of platinum resistance thermometers. Platinum resistance thermometers from Process Parameters are among the best available on the market today and are a great place to start if you’re looking for PRT’s.
Platinum Has a High Melting Point
Platinum has a melting point of 1769 degrees Celsius. This is much higher than the boiling point for water, which is 100 degrees Celsius at sea level pressure. This means that it can withstand a high amount of heat without being able to melt or evaporate.
As such, platinum can be melted and used as a liquid in thermometers without any issue.
A high-melting-point metal such as platinum is also necessary to construct a thermometer that resists temperature changes. Without any degree of stability, measurements taken with such an instrument would be inaccurate and unreliable. Platinum’s resistance to heat makes it well suited for use as a sensor component in this type of device.
Conducts Electricity Well
Platinum is an excellent electrical conductor, so it was initially used in the first thermometers because of this. Platinum resistance thermometer, which measures the temperature by comparing how fast electricity flows through platinum at different temperatures, still uses this metal for its excellent conductivity.
A critical element to note is that platinum resistance thermometers rely on measuring the electrical current produced by the heat to measure temperature. For this reason, it needs a material that will conduct electricity very quickly and easily for this function to work effectively. This is why platinum is the best option for these thermometers.
Platinum Can Withstand Contact With Water
Platinum is the most corrosion resistant of all metals. It can be used in contact with water without being damaged and does not react to oxygen or sulfur dioxide gases. This makes it perfect for use in things subjected to high humidity levels, such as resistance thermometers.
The corrosion resistance of platinum means that the metal doesn’t need to be covered by any other materials to protect it from damage. With this said, a platinum resistance thermometer that will be used for measurements in outdoor environments where it might come into contact with moisture needs to be made from this material.
The non-corrosive nature of platinum enables companies to save money. This is because the equipment will be tarnished or corroded.
Very Un-reactive Chemically
Platinum is a noble metal and chemically very unreactive. It does not react with any solid reducing agent or oxidizing agents at room temperature. These substances may contaminate the platinum resistance thermometer and affect its accuracy in the measurement of temperature change.
However, with platinum as the main component, there is no need to worry. This is due to the lack of any element that might affect the measurements.
In addition to being unreactive, it has been found that platinum is also chemically stable, which means it hardly combines with other elements. As a result, there is no change in the colour of the platinum resistance thermometer when it comes in contact with substances within the thermometer’s temperature limits.
Since platinum is chemically inert, no reactions are occurring that would alter its appearance over time. This, hence, implies that the platinum resistance thermometer has a very long shelf life. A company will, therefore, do not need to replace it for a long while.
Density
Platinum has a density comparable to that of water. The high density will make the platinum resistance thermometer become solid and robust and can be used comfortably in places where the temperature is very low. It is also used in the production of high-pressure devices.
Platinum Resistance Thermometers Wrap Up
Platinum is one of the most expensive metals, and it’s used in several different industries. Due to the high price, companies are considering the option of recycling it. The information above shows that platinum is used in resistance thermometers for industrial applications because of its properties. Also, it’s longevity enables companies to save money as they do not have to keep replacing it. In a nutshell, platinum material is a good investment.