Stanlay BDV testers are designed to measure the breakdown voltage (BDV) of transformer oils with high precision. These fully automatic testers help determine the dielectric strength of insulating oils and detect contamination or moisture that can affect transformer performance. With models up to 100 kV RMS AC output, built-in printers, and adherence to IEC and ASTM standards, Stanlay BDV equipment ensures reliable testing and long transformer life.