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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.
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)
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, 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 |