safe load indicator it is a safety parts. A safe load indicator has the capability of detecting the angle, weight of load lifted, and ground radius of any lifting device. It controls the lifting equipment to the level that it tries to keep the machinery functioning as per the manufacturer’s suggested safety charts. Load Moment Indicator – LMI. For hydraulic cranes, the LMI reads its load value using a pair of pressure transducers, which read the cylinder pressures of the lift cylinders. An advantage of an LMI is the weight of the boom is calculated as a part of the load calculation LMI system utilizes multiple sensors fitted on the crane parts to analyze each of the measured parameters, then further display it in the operator’s cabin via a monitor. In short, the Load Moment Indicator provides the crane operator with the information necessary to fully use the crane’s capacity while keeping lifting safe within the working limits of the crane. The downside of a load moment indicator is the high cost of calibrating the empty and loaded boom configurations.