- Compliance with DIN ISO 385 and USP standard – IS 1997:2008
- Accuracy as per Class B.
- Printed in white/Blue color.
- Highly resistant to chemical attack
OVERVIEW:
GWSI Glass Lab produces this 100 ml straight bore burette with a glass key screw thread and Class B volumetric accuracy from premium borosilicate 3.3 glass. It delivers high thermal shock resistance, full chemical inertness, and hydrolytic resistance for precise dispensing in compact setups. Every unit is I.S.O. DIN, NABL calibrated for consistent performance.
HISTORY :
Straight bore burettes with glass key screw threads evolved from traditional manual stopcock designs, offering secure threaded flow control for small-volume standard titrations. 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
* Compact dispensing with secure threaded control
MANUFACTURING PROCESS:
We melt high-purity borosilicate 3.3, shape the straight bore 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.
MAINTENANCE & SAFETY :
* Autoclavable lab glass: sterilize at 121 °C with the glass key screw thread fully open.
* Clean with non-abrasive detergents; protect interchangeable ground joints and threaded glass surfaces from chips.
* 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.