The Seaward CR/500 4-Terminal Calibration Resistor, High Accuracy, 500 Ohms combines high accuracy, class 0.02, long term stability and permanence of calibration in a compact unit. Constructed using carefully selected low temperature coefficient Zeranin wire and mounted to ensure mechanical stability, these resistors will provide a cost effective addition to any laboratory or workshop. Typical applications of the CR500 include calibration reference, accurate current measurement instrument calibration and accurate shunt resistors.