Pressure (including negative pressure) transmitter for measuring liquid, gas or steam liquid level, density and pressure, and then converted into 4 ~ DC 20mA signal output. FY-1151/3351GP intelligent pressure (including negative pressure) transmitter can communicate with the HART hand operator, through it to set, monitor or with the host computer to form a field monitoring system. FY-1151/3351GP field adjustment type intelligent pressure (including negative pressure) transmitter is a new product developed by the company according to the requirements of the field, can be separated from the hand operator, through the button to achieve the scene zero adjustment, configuration and other operations.