The LSR series is developed to meet the requirements of high current / low resistance applications. Bulk Metal resistive elements are used to ensure the best long-term stability and lowest temperature coefficient is achieved. The enclosure is made of perforated aluminum to allow e ective temperature dissipation, especially under conditions of high electrical power. The LSR can be used in air without oil bath or cooling unit, it is suitable for a wide range of applications, such as high precision measurements, calibration in corporate metrology labs, and a reference for precision power supplies, etc. HIGH CURRENT OPTION Ability to change terminal knobs for measuring the power up to 4W (63A) for 1 mΩ type (see the picture). Add P to the end of model number, when ordering. Type: LSR-1N0P The spacing between voltage terminals is 19.05 mm.