Class B Graduated Burettes (TD), Straight Bore PTFE Key Stopcock

Each burette is equipped with a premium straight bore polytetrafluoroethylene (PTFE) key stopcock. Unlike traditional glass plugs, this self-lubricating fluoropolymer assembly eliminates the need for messy hydrocarbon grease, keeping your titrants completely free from chemical contamination. The low-friction key offers smooth tactile feedback, enabling precise single-drop fluid delivery. To ensure long-term readability, the volumetric column features permanently fused, high-contrast white enamel graduations that resist wearing down even after aggressive acid baths or automated dishwashing cycles.

Key Functional Benefits:

• Grease-Free Reagent Purity: The self-lubricating PTFE straight bore plug prevents joint freezing and entirely removes the risk of stopcock lubricants leaching into and fouling your analytical assays
• Calibrated To Deliver (TD): Calibrated using automated fluid systems to ensure that the volume of liquid dispensed matches the graduation markings exactly, compensating for the thin fluid layer that naturally remains on the inner glass wall
• Resilient White Enamel Graduation: Bold, sharp white markings provide high contrast against darker titrants, reducing user parallax errors and remaining intact through repeated sanitization cycles
• Cost-Effective Lab Bench Solution: Built to strict Class B volumetric guidelines, offering academic institutions and industrial testing facilities a budget-conscious, high-reliability alternative to premium certified Class A options