High chemical compatibility bottle top dispensers offer a sophisticated blend of features and functionality, and meets ISO 8655 standards for accuracy and precision.

• Ergonomically designed
• Excellent chemical compatibility; dispensers can also be used with solvents
• Re-circulation valve to prevent loss of reagents
• Springless Valve™ for jam-free dispensing
• PTFE piston with ETP O-Ring
• Volume adjustment knob enables effortless volume setting
• Flexible delivery nozzle
• Fully autoclavable at 121 °C and 15 psi for a duration of 10 to 15 minutes

Designed with ergonomics and intuitive handling in mind, VWR® Bottle Top Dispensers exhibit excellent chemical compatibility and offer reliable precision in practical laboratory environments. The dispensers use a Re-Circulation Valve which prevents the loss of reagents during purging by re-directing them into the mounted bottle, thus facilitating bubble-free dispensing. A PTFE piston with ETP O-Ring, coupled with a unique Springless Valve™, facilitates effortless piston movement and ensures high chemical compatibility. VWR® Bottle Top Dispensers can also be used with solvents (refer to chemical compatibility chart). A specially designed volume adjustment knob allows 180° rotation for easy and effortless volume setting. It also has a flexible delivery nozzle that allows users to change the angle of dispensing.