HPLC system LHLC-B11 delivers high quality performance and reliable results in order to meet the stringent requirements of the customer. To meet GMP/GLP requirements of the instrument, this HPLC system has hardware with VP function which records maintenance information and operations. It has a flow rate range0.001-9.999mL/min, detection limit of≤1×10-9 g/ml and flow rate precision of ±5%. This HPLC system can conveniently change the sample input volume. It has applications in the scientific research studies, detection of residual amount in medicine, food, alcohol and in chemical analysis.