CXT/20Pb Load Moment Indicator is a real time monitoring control system for the real time working position of the in-service crane.It is suitable for any brand names,both domestic and foreign,and all kinds of cranes.The operating safety and efficiency of the in-service cranes equipped with this system will be highly enhanced.Data of the load,the hook amplitude,the hook height and the corresponding moment are obtained by sensor,processed by the micro processor and displayed on the LCD monitor,enabling the crane operator to know the real time working status of the crane clearly and directly. The system can automatically and reliably make the crane operate within its own hoist performance curve,or the load diagrams.Upon detection of any possibilities of exceeding the performance curve and the moment,the system will first sound the alarm and then,if the operator still has not yet realized the operating error,trigger the crane's own control system to work and to automatically stop the operation,there by avoiding accidents from happening due to negligence or improper operation of the crane operator.