SITRANS 7MF4433 差压变送器能测量液体和气体的 差压、流量、压力和液位，并输出对应的4-20mA模拟信号和数字信号。可通过控制键，HART 通讯， PROFIBUSPA 或基金会现场总路接口进行参数设定。
测量变量： 腐蚀性和非腐蚀性气体、蒸汽和液体的差压。
· 量程(连续可调) DS III HART 系列： 1 mbar ... 30 bar
· DS III PA 系列7MF4434 (PROFIBUS PA)： 20 mbar ... 30 bar
· DS III FF 系列7MF4435 (基金会现场总线)： 20mbar ... 30 bar

The SITRANS P DS III series includes digital pressure transmitters for measuring gauge pressure, absolute pressure, differential pressure, flow and level. Even the standard devices offer comprehensive diagnostics and simulation functions with high reliability. The suitability for use in SIL2 circuits has been certified by external test institutes. With Profibus transmitters, the new PROFISAFE technology guarantees uniform safety from the control system down to the transmitter.