The 2813509 from Phoenix Contact is an AC Current Transducer that is designed for measuring sinusoidal and non-sinusoidal alternating current measurements. It requires an input current of 0 - 400 A. This current transducer provides an output current signal of 4- 20 mA and has a linearity error of less than 1%. It is loop-powered and does not require an external power supply. This current transducer can be retrofitted with an open-up Rogowski coil and has a slide switch for measuring range selection. It is available in a DIN rail-mount package that measures 85 x 70.5 x 55 mm.