The OPM II is an online optical particle monitor, based on light absorption, for precise analysis of dirt and purity trends in fluids. It provides rapid alerts when limits are exceeded, is compatible with ISO4406:99 or SAE AS4059E, for mineral, biological and diesel oils. Easy configuration, integrated memory, supports pressure up to 420 bar (dynamic) / 600 bar (static), flow from 50 to 400 ml/min, and operation from -20 to +80°C.