Two-wire advantages: 1, less susceptible to parasitic thermocouples and pressure drop along the wire resistance and temperature drift, can be used very cheap finer wire; can save a lot of cable and installation costs; 2, when the current source output resistance is enough large temperature transmitters, magnetic field sensor coupled to the voltage of the wire loop will not have a significant impact, because the current source of interference caused by small, usually using twisted pair can reduce the interference; three-wire and four-wire system must honeywell_ temperature transmitter, shielded cable shield should be properly grounded shielded cable. 3, capacitive interference can cause the receiver to the resistance of the error, for 4 ~ 20mA two-wire loop inlet temperature transmitter, the receiver resistance typically 250Ω (sampling Uout = 1 ~ 5V) that resistance small enough to produce significant error, therefore, it can allowed wire length longer than the voltage telemetry system; 4, each time a single display device or recording device can be connected to the exchange wire length ranging between different channels, not because of unequal length wires caused by differences in accuracy, decentralized collection, the benefits of decentralized capture is: decentralized collection, centralized control .... 5, 4mA to zero level RTD temperature transmitter, so judgment open and short circuit or sensor is damaged (0mA state) is very convenient. 6, two-wire output port is easy additional twelve lightning protection and surge device, is conducive to safe mine explosion. MCT multi-protocol communications device is equipped with two communication software: 1.MCT software DE and HART device configuration for Honeywell. 2.SDC625 software company for non-Honeywell HART device configuration. Combination of these two software applications, you can configure all HART devices. MCT202 can achieve this level of security, while meeting Zone1 and Zone2 standards of FM and ATEX. honeywell temperature transmitter, Honeywell (certified), temperature transmitters provided by Jinan-Technology Limited. Jinan Huahui Technology Co., Ltd. (www.cnhuahui.com/) Shandong Jinan, pressure meters leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. - Technology leader in China with the staff warmly welcome all inquiries negotiations to create Hua Hui Technology better future.