The Alstom iSTAT M2x3 High Performance Measurement Centre is a product of brilliance and ingenuity. It offers High sampling rates and true RMS measurement give accurate readings under all harmonic conditions,with Measurement accuracy better than 0.2% and Class 0.5S Energy which are suitable for many applications. It is built to withstand even the most demanding of application or the harshest of working condition. It's made to provide optimum performance. The M253 is a Power Quality meter that has the functionality of the M243, but in addition it measures and records all of the quantities required to check compliance to EN50160.