NY3051 series intelligent differential pressure/pressure transmitter is an intelligent field instrument conforming to HART protocol. The original imported diaphragm is used in the design, and the microprocessor and HART communication circuit are used, which can carry out two-way communication with any host computer software that supports the HART communication protocol or 475 and other hand-held devices that conform to the HART communication protocol, and has a 5-digit smart number. The liquid crystal display can display the differential pressure/pressure value, output current value and output percentage value on site. It is very convenient to debug, realizes the digital and intelligent functions of the transmitter, and is compatible with the traditional 4~20mA analog output signal so that it can be used in different situations. In the case of changing the control system, the exchange with the analog watch can be realized.