220DD-00100A2B Baratron 热差电容压力计

220DD-00100A2B Baratron®热差电容压力计具有1 Torr(1毫米汞柱)全量程压力测量和0.5英寸外径管接头。它为测量低压差提供了可靠、准确、廉价的解决方案。220DD全金属传感器采用可变电容技术，包含一个张紧的金属膜片，其一侧暴露于待测压力气体(Px侧)。另一侧(参考或Pr侧)与电极组件相邻，电极组件端接在另一个类似端口中。膜片随着压差的变化而偏转，导致膜片和相邻电极组件之间的电容变化。电容变化产生交流电压，该电压被放大、解调并转换为高电平直流电压输出，与压力成线性关系，并根据压力标准进行校准。220DD型传感器温度控制在45°C，增强零点和跨度稳定性。所有组件都安装在坚固的NEMA 1外壳中，以便在恶劣环境中使用时提供保护。两个输出，0-10 VDC和4-20 mA，提供与普通过程控制器接口。

全金属传感器消除了与玻璃，汞和液体仪表相关的处理问题
可用分辨率为万分之一，最大限度地减少了覆盖广泛压力范围所需的电容式电磁流量计的数量
NEMA i外壳在恶劣的工作环境中提供传感器保护
传感器温度控制在45°c，性能稳定
同时0至10 VDC和4至20 ma输出接口与常见的过程控制系统

220DD-00100A2B

The 220DD-00100A2B Baratron® Heated Differential Capacitance Manometer features 1 Torr (1 mm Hg) full scale pressure measurement and a 0.5 inch OD tube fitting. It offers a reliable, accurate, inexpensive solution to measuring low differential pressures. Operating on the variable capacitance technique, the 220DD all-metal sensor contains a tensioned metal diaphragm, one side of which is exposed to the gas whose pressure is to be measured (Px side). The other side (reference, or Pr, side) is adjacent to an electrode assembly which is terminated in another like port. The diaphragm deflects with changing differential pressure, causing a capacitance change between the diaphragm and the adjacent electrode assembly. The capacitance change generates an AC voltage which is amplified, demodulated, and converted into a high level DC voltage output, linear with pressure, and calibrated against a pressure standard. The Type 220DD sensor is temperature controlled at 45°C for enhanced zero and span stability. All components are housed in a rugged, NEMA 1 enclosure for protection when used in harsh environments. Two outputs, 0-10 VDC and 4-20 mA, are provided for interfacing with common process controllers.

All-metal sensor eliminates handlingproblems associated with glass, mercury,and liquid gauges
Useable resolution of 1 part in 10,000minimizes the number of capacitancemanometers required to cover a widerange of pressures
NEMA i enclosure provides sensorprotection in harsh operatingenvironments
Sensor is temperature controlled at 45°Cfor stable performance
Simultaneous 0 to 10 VDC and 4 to 20mAoutputs interace with common processcontrol systems