214A

热电阻 (RTD) 工作原理是基于金属导体的电阻随温度变化的特性实现测温。其核心原理是: 当温度变化时, 铂、铜等金属导体的晶格振动幅度改变, 导致电子运动受阻程度不同, 电阻值随之变化。以铂电阻Pt100为例, 0℃时标准电阻为100Ω, 温度每升高1℃电阻约增加0.385Ω, 在一定温度范围内呈现高度线性关系。 热电偶结构简单, 坚固耐用。热电偶传感器基于塞贝克 (Seebeck) 效应进行温度测量。两种不同的导体连接成闭合回路。只要两结点处的温度不同, 回路中就会出现微小的电压差。此电压差被称之为热电压或热电动势。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.