In "Automatic Control Theory", the transmitter is converted sensor output signal which may be recognized by the controller signal converter. As sometimes the sensor output signal common because most modern sensors has been common controller may receive a signal, this signal may not be directly converted to the identified transmitter controller. Therefore, the "transmitter" meaning the traditional sense should be: "The sensor output signal is converted to a controller or measuring instruments can be the instrument of acceptance of the standard signal." In automatic control: Source -> Sensors -> Transmitter -> Operational Controller -> Actuator -> control output. As the name suggests, the transmitter contains "change" and "send" means. The so-called "change" Single Flange, refers to a variety of physical quantities from the sensors, into an electrical signal. For example: the use of a thermocouple, the temperature change of the potential; the use of a current transformer, the large current into a small current. Because most likely to deal with Honeywell electrical Flange, so modern transmitter, both the physical signals into electrical signals. Flange therefore, we are talking transmitter, usually into a "power." The so-called "free" refers to the various electrical signals has become, in order to facilitate the control of other instruments or means for receiving and transmitting, and again through the electronic circuit, the sensor to electrical signals, unified (such 4-20MA). The method is realized by a plurality of operational amplifiers. This "change" + "send" on the formation of the modern most common transmitter. _ Single Flange Flange STF724_ Hua Hui Technology (certified merchants) provided by Jinan-Technology Limited. Jinan Hua Hui Technology Co., Ltd. (www.cnhuahui.com/) in this field pressure instrument devoted boundless enthusiasm and passion, Hua Hui technology has been customer-centric, the idea of ??creating value for customers, quality, service to win market, and sincerely hope to cooperate with the community to create success, create brilliant. Related businesses are welcome inquiries, contact: Li.