The 43i-HL high concentration sulfur dioxide (S02) uses patented pulse fluorescence technology to analyze sulfur dioxide in the air. The measurement range of S02 ranges from sub ppm to 1000ppm, and in the extended range mode, the measurement range can be from 100ppm to 10000ppm.

Dual range, automatic range, and temperature and pressure correction are standard functions of the instrument. In an easy-to-use menu, concentration alarm settings and various internal diagnostics can be easily performed.

This analyzer, which combines advanced contemporary technology, has network connection ports and flash memory capable of storing more data. The newly added network interface makes remote control more convenient, allowing users to download analysis results remotely.

The newly added 'soft key' function allows users to set the function of the keys according to their needs, thereby directly entering commonly used menus and functions. The enlarged LCD screen can accommodate more information, and in addition to always displaying analysis results, it can also simultaneously display other operation menus, operating status, and other information.