SH105B Automatic Closed Flash Point Tester GB/T261‑2021 Oil Petroleum Measuring Printing Function The SH105B Fully Automatic Closed Cup Flash Point Tester is built with microcomputer control and a large LCD screen. Following standard test procedures, the instrument automatically completes heating, cup lifting, ignition, flash point detection, value locking and result printing. It will initiate automatic cooling once the test finishes, delivering fully automated operation.