定硫仪测定冶金焦用精煤质量时，硫分指标分四级。                                                                                                                      1级精煤硫分为≤0.50%；                                                                                                                                                                      2级精煤硫分为0.51～0.75%；                                                                                                                                                            3级精煤硫分为0.76～1.00%；                                                                                                                                                               4级精煤硫分为1.01～1.50%

原创作者：鹤壁市鼎盛仪器仪表有限公司