What are the advantages of thin film platinum resistance in temperature instruments?
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We often see thin film platinum resistors as a species on the fission of many temperature instrument components. The editor believes that although many people have seen thin-film platinum resistors, they may also have taken a quick glance and won't pay much attention to what thin-film platinum resistors are. Why are thin film platinum resistors used in temperature instruments? Today, the editor will explain to you what thin film platinum resistors are.
Thin film platinum resistance, also known as thin film platinum thermistor, is a temperature sensor element that changes its resistance value with temperature, thereby monitoring the ambient temperature in real-time. The production technology of thin film platinum thermistors is a new production process that replaces coils with film technology. It is composed of a platinum film with micrometer thickness and its attached substrate, and the temperature measurement range can reach -50-600 ℃.
Characteristics of thin film platinum resistance
High resistance value: The resistance value is 100 ohms at 0 ° C for pt100 platinum resistance, and 1000 ohms for pt1000 platinum resistance. However, the resistance value of thin film platinum resistance gradually decreases with the increase of temperature, making it suitable as the core component of temperature instruments.
High sensitivity: The thin film platinum resistor can quickly respond to changes in ambient temperature, with a corresponding time of only 0.15 seconds in slowly flowing water.
Small size: The external dimensions of thin film platinum resistors are very small, in the order of millimeters, making them particularly suitable for installation in narrow spaces, such as temperature instruments. Temperature instruments themselves are not very large in size, so thin film platinum resistors are very suitable.
Good stability: According to data statistics, the resistance of the thin film platinum resistor changes less than 0.02% after continuous operation for more than 1000 hours in a high temperature environment of 600 ℃.
Low cost consumption: In the case of large-scale automated production, thin-film platinum resistors have extremely low costs, which are 50% -60% lower than similar wire wound resistors.
