Resistance-type Temperature Sensor is also known as
resistance temperature detectors (RTDs). A RTD sensing element consists of a
wire or etched foil of pure metal. The element¡¯s resistance increases with
temperature in a known and repeatable manner. RTDs exhibit excellent accuracy
over a wide temperature range and represent the fastest growing segment among
industrial temperature sensors. Also,
combining TPS technique with film sensor, this
sensor is used for convenient thermal conductivity and thermal diffusivity
• Temperature range: -260 to 260¡ãC.
• Repeatability and stability, Ordinary industrial RTDs typically drift less
• Sensitivity. The voltage drop across an RTD provides a much larger output than
• Linearity: Platinum and copper RTDs produce a more linear response than
thermocouples or thermistors. RTD non-linearities can be corrected through
proper design of resistive bridge networks.
• Low system cost: RTDs use ordinary copper extension leads and require no cold
• Standardization: Manufacturers offer RTDs to industry standard curves.
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