0.5-5Ml volume range, 0.1Ml increment +/- 0.6 percent accuracy. The beta Series bottle top dispenser is designed with a recirculation Valve that redirects liquid into a bottle for bubble free dispensing and prevents loss when purging. Each unit has a springless PTFE Valve manifold for exceptional functionality and chemical compatibility. Easy to use with simple, quickset volume adjustment knob. A swivel adapter allows 360 degree nozzle rotation. Dispensers are made for standard 30mm threads and include five adapters (28mm, 32mm, 36mm, 40mm and 45mm) that fit most reagent bottles. Adjustable nozzle with a cap prevents dripping. Easy to disassemble for cleaning and servicing. Individually calibrated in accordance with ISO 8655 standards and includes a calibration certificate. Dispenser can be calibrated by user in lab. Excellent chemical compatibility and fully autoclavable. Product specifications: piston – Teflon/PTFE Barrel – glass with PP sleeve housing – polypropylene/Teflon volume adjustment – quick set Valve assembly – glass ball & Seat discharge assembly – Teflon delivery tube – Teflon wetted parts – FEP, PTFE, glass.