Abstract: THE ERROR ANALYSIS OF COKE MOISTURE MEASURED BY NEUTRON MOISTURE GAUGETian Huixing（Shougang Electronic Instrument Compang,Beijing 100041） The error of Coke moisture measured bv neutron method in the iron and steel industry is ana-lyzed．The main cause of errors is inaccurate sampling location in the calibration procedure on site. Bycomparison, the instrument error and the statistical fluctuation error are smaller．So the sampling pro－portion should be increased as large as possible in the calibration procedure on site，and a satisfied cali-bration effect can be obtained on a suitable size hopper.Key words neutron moisture gauge coke calibration error analysis