This dispenser is Swiss-built and precise for safe handling of all liquids and reagents. Semi-automated with reproducibility better than 0.5%. Accuracy is improved by retractable column and easy setting. All parts which contact liquid are inert to chemicals. Unit has synthetic ruby ball valves, Pyrex valve PTFE delivery jet, amber glass reservoir and neutral glass syringe. The dispensing unit is protected inside the wide-mouth glass reservoir. Resistant to corrosion, and has no springs to rust or wear out. Delivery jet may be replaced by optional extension tubing to let you dispense away from dispenser. When cleaning, can be completely disassembled. Can be autoclaved at 120°C.