Burette with straight valve 24 series

Burettes are calibrated volumetric instruments with graduations and groundin stopcocks. They are used in laboratories for quantitative measurements of smaller liquid volumes in titration. Burettes are calibrated ”Ex” (to deliver): The imprinted volume corresponds to the delivered quantity of liquid. Classification: • Class AS (fast delivery, circular graduation at main points). ”A” stands for highest accuracy, ”S” for fast delivery. The tolerances of class AS are half of the tolerances of class B according to DIN ISO standards. • Class AS conformity certified (fast delivery, circular graduation at main points): Conformity means compliance with the German Calibration Regulations and the relevant standards. Conformity symbol By imprinting the conformity symbol ”DE-M” along with the year we confirm that the measuring device complies with these conditions. A batch certificate of conformity is supplied together with every box. On request individual certificates of conformity are available. • made of borosilicate glass 3.3 • in compliance with DIN EN ISO 385 • very good chemical resistance • minimal thermal expansion • high resistance to thermal shocks • blue graduation • well legible numbers and graduations • 2 pieces in a sturdy carton Versions: • clear glass • with Schellbach stripe at the back of the instrument which facilitates reading precisely the meniscus of the liquid • amber glass (glass dyed brown)