214A

RTD (RTD) 工作Principle 是Based on 金属导体的Resistance 随Temperature 变化的特性实现测温。其核心Principle 是: when temperature changes, 铂, 铜等金属导体的晶格振动幅度改变, 导致electronics 运动受阻程度不同, Resistance 值随之变化。以铂Resistance Pt100为例, 0℃时Standard Resistance 为100Ω, Temperature 每升高1℃Resistance 约增加0.385Ω, 在一定Temperature Range 内呈现高度线性关系。 热电偶Simple structure, Rugged and durable 。热电偶Sensor Based on 塞贝克 (Seebeck) Effect 进行Temperature measurement 。两种不同的导体Connection 成闭合回路。只要两结点处的Temperature 不同, 回路中就会出现微小的Voltage 差。此Voltage 差被称之为热Voltage 或热电动势。大小与The materials of the two conductors are related to the temperature difference between the "measurement point" (the junction of the two conductors) and the "cold end" (the open-circuit end of the conductor). Therefore, thermocouples are usually only used for temperature difference measurement. Given the cold end temperature, or after conducting separate temperature measurement and compensation, the absolute temperature at the measurement point can be obtained.

Rosemount 214A Temperature Sensors offer easy solutions for thermocouples and RTD's that require special designs. The Rosemount 214A can be built-to-order for your specific connection type, sheath size, wiring requirements and more. Get exactly what you need for your system, including surface mount sensors, bearing sensors, lead kits, and quick connect terminations.