Class A Corning PYREX® dispensing burets are manufactured to ASTM E-287 test method standards and are calibrated in accordance with ASTM E-542 and D-511. These automatic glass burets are individually serialized and supplied with a Certificate of Identification and Capacity. They are traceable to NIST standards. Buret tip is carefully drawn from accurate bore tubing to insure proper drainage rates. Pyrex dispensing burets have colored markings, fine, sharp lines and large easy-to-read numbers. The stopcock barrel has a smooth micro-finish to assure leak-resistant performance. Automatic glass burets are supplied with a dust cover and PTFE stopcock plug. Material: Cornging Borosilicate Glass Code 7740. Corning 2105 series.
Corning 2094 Series PYREX® graduated Class B glass dispensing burets are suitable for use in school and institutional laboratories not requiring the accuracy of Corning's Class A model. Dispensing buret is used for dispensing large volumes of liquids rapidly and accurately. Made from close tolerance, accurate bore tubing with uniform walls, this buret has a permanently colored scale. Equipped with a Teflon stopcock plug to reduce freezing and eliminate lubricant contamination. The smooth micro-finish of the stopcock barrel assures a precision fit and optimum leak-resistant performance.Corning 2122 Series PYREX® graduated Class B glass dispensing burets are also perfect for schools and institutional laboratories not requiring Class A tolerances. . A PTFE stopcock plug reduces freezing and lubricant contamination. The microfinish of the barrel provides a precision fit. The tip is carefully drawn for accuracy to insure proper drainage rates. Each buret is supplied with a dust cover and has a permanently colored scale. Furnished with a 2mm bore stopcock plug.
These break plastic burets are maed from break-resistant, clear acrylic and are screen printed in black to Class B accuracy. These plastic burets are suitable for use in education, research or industrial laboratories, especially where breakages often occur. This series is unaffected by most dilute aqueous solutions (except ammonia and HF) but unsuitable for ethanol or organic solvents. Individually calibrated.