The HI-190 series offer superior stirrer capabilities without a high price tag. Measuring a compact 120 x 120mm these stirrers take up the minimum of bench top space (or fume cupboard space), whilst providing reliable and consistent stirring of liquid samples. This version is supplied compete with mains cable and plug. Their high specification includes an optical speed control feedback circuit which maintains a constant stirrer speed and limits the maximum speed to 1000rpm even if the load is suddenly removed, thus preventing motor wear and providing a longer operational life. Maximum stirring capacity 1L.