Burettes acc. to Mohr

Burettes are calibrated volumetric instruments with graduations and ground-in 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).
”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)
Conformity means compliance with the German Calibration Regulations and the relevant standards.

By imprinting the conformity symbol ”DE-M” 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
circular graduation at main points
well legible numbers and graduations
total length approx. 760 ± 20 mm
2 pieces in a sturdy carton

Versions:

clear glass, blue graduation
with Schellbach stripe at the back of the instrument which facilitates reading precisely the meniscus of the liquid, blue graduation
amber glass (glass dyed brown), white graduation

Class AS, with NS glass plug:

Cat. No. clear glass	Cat. No. Schellbach	Cat. No. amber glass	Capacity	Tolerance	Unit
2422001	2423001	2426002	10 : 0,02 ml	± 0,02 ml	2
2422011	2423011	2426012	25 : 0,05 ml	± 0,03 ml	2
2422031	2423031	2426032	50 : 0,1 ml	± 0,05 ml	2
2422041	2423041	2426042	100 : 0,2 ml	± 0,10 ml	2

Class AS, with NS PTFE plug:

Cat. No. clear glass	Cat. No. Schellbach	Cat. No. amber glass	Capacity	Tolerance	Unit
2422101	2423101	2426102	10 : 0,02 ml	± 0,02 ml	2
2422111	2423111	2426112	25 : 0,05 ml	± 0,03 ml	2
2422131	2423131	2426132	50 : 0,1 ml	± 0,05 ml	2
2422141	2423141	2426142	100 : 0,2 ml	± 0,10 ml	2

Class AS, with NS glass plug, clear glass made of KPG precision tubing, calibrated at 5 points, conformity certified DE-M, with batch certificate:

Cat. No.	Capacity	Tolerance	Unit
2432001	10 : 0,02 ml	± 0,02 ml	2
2432011	25 : 0,05 ml	± 0,03 ml	2
2432031	50 : 0,1 ml	± 0,05 ml	2
2432041	100 : 0,2 ml	± 0,10 ml	2