Handheld multimeters Elma 257s - True RMS multimeter with autocheck and... 6398910398 €158.40 Elma BM257s is a new smart mini multimeter with two new intelligent functions. Autocheck is an intelligent function which automatically detects and chooses AC voltage, DC voltage, continuity and resistance scale. All you have to do is turn on the instrument and measure. Low Z is a way to measure voltage with low impedance. This means that the measured... Add to cart