Features: 1, with vertical integration structure, nice appearance. 2, external electronic balance, automatic input sample weights. At any time during the test sample is added. 3, electrolytic current constant current method, implemented by software coulometric titration. Directly modified by the software itself, good repeatability and high accuracy. Test results are better than the national standard GB / T 214-2007 "Determination of total sulfur in coal." 4, using a number of hardware and software protection and self-diagnostic technology to ensure stable operation of equipment. 5, computer test software supports Windows operating systems, human-machine interface friendly, easy to learn to use the operator. With powerful database functionality, user-friendly data management. 6, the control system hardware using the latest Texas Instruments MSP microcontroller and powerful. Control system software in a multi-tasking operating system UC / OS-Ⅱ write, reliable application performance, strong anti-jamming capability.