Manufactured from pre-vacuum calibrated borosilicate 3.3 tubing according to ISO 385 standards.
Calibrated according to DIN/ISO Class “AS” standard. Featured with a (“DE-M”) conformity mark according to German federal weights and measures regulations.
Individual calibration carried out by automatic robots eliminate possible deviations from nominal values.
Conformity mark and batch number printed on the body surface. Batch certificate can be downloaded from website.
Featured with an intermediate PTFE stopcock for fast and accurate measurement. Supplied with a PTFE “needle” valve stopcocks which does not require greasing at all.
Inscriptions and nominal values on amber burettes are printed with white enamel.
IMPORTANT: Automatic burettes are supplied without bottles and bellow. Bottles and bellows should be ordered separately.
How to Use Burettes:
Fill the burette a bit higher than the “0” level.
To activate the stopcock, drain the solution but never below the “0” mark.
Pay attention there will be no air bubbles left in the burette.
Fill more solution above 10 mm of the “0” mark.
Do not wet the burette wall above the liquid level.
By focusing the meniscus at eye level drain the solution to the exact “0” mark.
Wipe off the drops at the stopcock tip and slowly start the titration.
When color changes stop the titration and wait for the 30 seconds.
Wipe off the remaining drop since this is also the part of the measured volume.