Serological Pipette Glass - Class B

A Class B Graduated Pipette (Serological Type) is a standard laboratory instrument used to measure and transfer variable volumes of liquid. Unlike the highly precise Class A versions, Class B pipettes allow for a wider error tolerance (typically twice that of Class A) and are commonly used in educational or general industrial settings.

• Accuracy: Calibrated to Class B standards, typically following DIN ISO 835 or ASTM E-1044.
• Design Type: Serological, meaning graduations extend all the way down to the tip (jet). They are intended for "blow-out" use, where the last drop remaining in the tip is expelled using a pipette bulb or filler.
• Material: Most high-quality reusable models are made from 3.3 Borosilicate Glass, which is autoclavable and highly resistant to chemical corrosion.
• Markings: Often printed in a permanent amber stain that is diffused into the glass surface for high visibility and durability. 

Capacity	Graduation	Tolerance ( mL)	Color Code (Standard)
1 mL	0.01 mL	0.01	Yellow
2 mL	0.02 mL	0.02	Green
5 mL	0.05 mL	0.05	Blue
10 mL	0.10 mL	0.10	Orange
25 mL	0.20 mL	0.20	Red/White

Specifications: 

• Capacity: Available from 0.01mL up to 25mL
• Material: 3.3 Borosilicate Glass
• Compliance with DIN ISO 835 standard.
• Accuracy as per Class 'B'.
• Amber (may be Blue) graduations, bright and unalterable.
• These pipettes are graduated to deliver from any graduation line down to zero at the jet , with the last drop blowout.
• Brand: OMSONS
• Product of India

• Serological: Graduations go to the tip; used for variable volume transfers; must be blown out.
• Mohr: Graduations stop before the tip; used to deliver volume between two marks; the liquid in the tip is not part of the measured volume.

1. Selection: Choose the smallest capacity pipette that can handle your volume (e.g., use a 5 mL pipette for a 4 mL transfer) to minimize measurement error.
2. Cleaning: Avoid using abrasive brushes inside the tip, as scratches can change the "blow-out" volume.
3. Bulbs: Always use a safety pipette filler or bulb; never mouth pipette, especially with the "blow-out" technique.