• Burettes, Straight Bore, Glass Key - Class B

Burettes, Straight Bore, Glass Key - Class B

OM3-2

  • Lab and Research

Vendor: OMSONS

Suited For: Lab and Research

Country of Origin: India

30-Day Limited Warranty
This product is covered against manufacturing defects in materials and workmanship for 30 days from the date of purchase.

This warranty does not cover: breakage caused by thermal shock (rapid heating or cooling); physical or mechanical damage, including drops, impacts, chips, and cracks from handling; damage from use outside the glassware's rated temperature, pressure, or chemical compatibility; damage from improper cleaning; normal wear such as scratching, staining, or discolouration; or unauthorised repair or modification.

To claim, contact SmartLabs within 30 days of purchase with proof of purchase and a description of the defect.
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R 200.73
R 200.73
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A burette is a graduated glass tube with a tap at one end, for delivering known volumes of a liquid, especially in titrations. It is a long, graduated glass tube, with a stopcock at its lower. The flow of liquid from the tube to the burette tip is controlled by the stopcock valve.

A Class 'B' Burette with a Straight Bore and Glass Key is the standard workhorse for general laboratory titrations and educational environments. Unlike the Rotaflow models, these use a traditional ground-glass stopcock.

Key Characteristics
  • Accuracy: Conforms to ISO 385 Class B standards. The tolerance for a 50mL unit is typically ±0.10 mL, which is double the margin of error of a Class A burette (±0.05 mL).
  • Stopcock (Glass Key): Features a precision-ground glass plug.
    • Note: These require stopcock grease (silicone or petroleum-based) to prevent leaking and to keep the glass from "freezing" or seizing up.
  • Graduations: Typically feature permanent blue or white enamel markings for easy reading.
  • Material: Made from Borosilicate 3.3 glass, providing excellent resistance to chemical corrosion (especially acidic solutions).
 
Comparison: Glass Key vs. PTFE Needle Valve
 
 
Feature Glass Key (Straight Bore) PTFE Rotaflow/Needle Valve
Lubrication Required (Grease) Not Required (Self-lubricating)
Chemical Resistance Excellent Superior (PTFE is inert to almost all chemicals)
Maintenance High (must be cleaned and re-greased) Low
Cost Generally more affordable Slightly more expensive

 Specifications

  • Compliance: Conforms to ISO 385 Class B standards.
  • Accuracy: Class 'B'
  • Material: High-grade Borosilicate 3.3 Glass, providing superior resistance to chemical corrosion and thermal shock.
  • Graduations: Durable Blue (amber on request) enamel graduations.
  • Stopcock Type: Straight Bore with a Glass Key.
  • Brand: OMSONS
  • Product of India

Specifications

Compliance: ISO 385 Class B
Material: Borosilicate 3.3 Glass
Tolerance: ±0.10mL (50mL Unit)
Stopcock: Glass Key, Straight Bore

Delivery

We deliver nationwide across South Africa. Once your order is on its way, you'll receive a tracking link by email so you can follow its progress. If you need your order urgently or you're delivering somewhere hard to reach, contact our team before you check out and we'll help where we can.

Warranty

This product is covered against manufacturing defects in materials and workmanship for 30 days from the date of purchase.

This warranty does not cover: breakage caused by thermal shock (rapid heating or cooling); physical or mechanical damage, including drops, impacts, chips, and cracks from handling; damage from use outside the glassware's rated temperature, pressure, or chemical compatibility; damage from improper cleaning; normal wear such as scratching, staining, or discolouration; or unauthorised repair or modification.

To claim, contact SmartLabs within 30 days of purchase with proof of purchase and a description of the defect.

Our Promise

At SmartLabs, we only stock equipment we'd trust in our own labs and classrooms. If a product arrives faulty or doesn't match its description, let us know and we'll make it right, whether that's a replacement or a refund. Our goal is for every order to work exactly as it should, the first time.