- Compliance with DIN ISO 385 and USP standard – IS 1997:2008.
- Accuracy as per Class ‘B’.
- Printed in Blue/white colour.
- Highly resistant to chemical attack
OVERVIEW:
GWSI Glass Lab produces this 100 ml rotaflow burette with a PTFE needle valve and Class B volumetric accuracy from premium borosilicate 3.3 glass. It delivers high thermal shock resistance, full chemical inertness, and hydrolytic resistance for rapid dispensing in compact lab setups. Every unit is I.S.O. DIN, NABL calibrated for consistent performance
HISTORY:
Rota flow burettes with PTFE needle valves emerged in the mid-20th century to eliminate manual adjustments and speed up repeatable dispensing for small-volume analyses. GWSI modernizes the 100 ml Class B version with borosilicate 3.3 durability, ceramic glass fusing, interchangeable ground joints, and autoclavable lab glass reliability.
APPLICATIONS:
* Pharmaceutical and biotech microscale titration
* School, college, university, and educational institutes
* Industrial quality control and analytical laboratories
* Research labs using Class B volumetric glassware
* Rapid, repeatable dispensing in compact analyses
MANUFACTURING PROCESS:
We melt high-purity borosilicate 3.3, form the burette tube through master hand-blowing or automated molding, apply ceramic glass fusing to interchangeable ground joints, and finish with controlled annealing to fully eliminate thermal stress.
TESTING PROCESS:
Every burette receives manual polariscope stress testing for zero residual stress, followed by high-precision ISO, DIN standard checks — manual or automatic testing machine — and NABL gravimetric calibration for Class B volumetric accuracy.
PRINTING PROCESS:
Graduations and markings are applied by precision screening with ceramic glass enamels, baked in high-temperature kilns to permanently fuse the scale into the borosilicate 3.3 matrix so it never fades.
PACKAGING PROCESS:
We run cosmetic sorting to filter out blemishes, assemble the PTFE needle valve securely, and pack in heavy-duty double-wall boxes with shock-absorbing bubble wrap for safe export from Ambala, the Science City.
MAINTENANCE & SAFETY:
* Autoclavable lab glass: sterilize at 121 °C with the PTFE needle valve removed or fully open.
* Clean with non-abrasive detergents; protect interchangeable ground joints and PTFE surfaces from scratches.
* Confirm hydrolytic resistance before prolonged acid or alkali titration cycles.
* Store vertically in a stable rack away from direct heat sources.
* Inspect for polarization stress before high-thermal-shock cycles.