Medical load cells are used in a wide range of delicate fluid-monitoring applications including blood transfusions, kidney dialysis, and blood donation. In such applications, the load cells ensure that the amount of fluids entering, leaving, or being replaced in the body are being started, stopped, or recirculated at the right time and in the proper dosage or ratios. If the cell is used inside a machine integrated with another medical device for monitoring, standard packaging materials such as stainless steel and anodized aluminum are used. If it is in contact with the human body or with fluids, special autoclavable stainless steel or disposable sensors can be used. It is also used for mechanical measurements such as bed-weight monitoring. By affixing load cells to hospital beds, the beds could effectively transmit accurate patient weight to a handheld instrument. Typically four load cells, one under each leg of the bed, fed data to a junction box that was connected to a related instrument or controller.