传统的差压传感器一般由差压敏感元件和温度补偿网络构成 ,输出信息量少。非线性及温度误差的补偿方法通常采用无源网络对传感器的两个端点进行补偿 ,比较粗糙 ,补偿精度较低 ,对静压带来的误差无法补偿。本文介绍了HART协议智能扩散硅差压变送器的组成原理及应用 ,阐述了扩散硅多功能传感器的特点 ,以及非线性及温度误差的补偿方法 The traditional differential pressure sensor is generally composed of differential pressure sensor and temperature compensation network, with less output information. Nonlinear and temperature error compensation methods usually use passive networks to compensate for the two endpoints of the sensor, which are rough and have a low compensation accuracy. The errors caused by static pressure can not be compensated. This paper introduces the composition principle and application of HART protocol intelligent diffused silicon differential pressure transmitter, expounds the characteristics of diffused silicon multifunctional sensor, as well as the compensation method of nonlinear and temperature error