VICI Valco’s Cheminert M Series diluter/dispensers are designed to simplify the sample preparation process for dispensing and diluting liquids. A Wizard format eliminates all the math calculations and external charts associated with diluting and dispensing applications. Just enter the dilution ratio and the final volume, and the correct volume is calculated and automatically dispensed. For multiple dispenses, simply enter the volume and number of dispense repetitions, and the Wizard calculates the total volume to be aspirated. Two models are offered — the M10 (pictured here) with a flow range of 10 nl to 10 ml, and the M50 with a range of 50 µl to 50 ml. The diluter/dispenser is built around a patented syringe-free, bidirectional positive-displacement pump. This design approach gives the largest volume range available and eliminates the inconvenience of having to change and re-fill syringes. A multiposition stream selection valve can be integrated with the pump for multi-solvent applications.