Bottletop Dispenser, Digital, Organic, 1-10mL, Dispensette S, with Recirculation Valve. Dispensette S bottletop dispensers are suitable for an amazingly broad range of applications, particularly for many acids, saline solutions and organic solvents. Extremely easy filling and dispensing. Simple priming by optimized flow channels. Rapid and safe volume adjustment with internal scalloped track. Dispensette S Digital: The mechanical volume setting is easy to read and ensures accurate and reproducible volume control. Easy Calibration Technique for calibration adjustment in seconds without tools. A calibration flag indicates changes from factory settings. The mechanical volume setting is easy to read and ensures accurate and reproducible volume control.