Achieving the highest level of accuracy in analytical chemistry requires high-grade glassware designed for single-volume delivery. Professional laboratory volumetric pipettes, calibrated "to deliver" (TD, Ex), offer the minimal tolerances necessary for preparing standard solutions and performing precise titrations. As a cornerstone of our liquid handling ecosystem, these fixed-volume instruments complement the variable-volume workflows found in our pipettes range, ensuring repeatable results.
Why Choose Professional Volumetric Pipettes?
Our curated collection of glass pipettes is engineered for durability and technical compliance:
- Precision AR-Glass Construction: We stock Hirschmann Volumetric Pipettes made from high-quality AR-glass, available in Class B for routine lab work and higher precision requirements.
- High-Contrast Graduations: Utilize pipettes with amber graduations or brown permanent stains, such as the Hirschmann 5 mL and 15 mL models, for easy readability against clear liquids.
- Diverse Volume Range: Select from a wide variety of sizes, including 0.5 mL, 1 mL, 2 mL, 3 mL, 10 mL, and 50 mL, to meet specific titration and dilution needs.
- Fixed-Volume Reliability: Eliminate the risk of volume adjustment errors inherent in mechanical pipettors by using calibrated single-mark glassware.
LabFriend supplies volumetric pipettes from world-renowned manufacturers of precision laboratory glassware:
- Hirschmann: The primary provider in this category, offering an extensive range of AR-glass pipettes with specialized graduation types and accuracy classes.
- BRAND: Global leader in volumetric measurement, providing high-performance glass and plastic liquid handling solutions.
- ISOLAB: Specialist in robust laboratory glassware, featuring a variety of calibrated pipettes for clinical and research applications.
- LLG Labware & Poulten & Graf: Trusted sources for essential laboratory glass consumables and precise volumetric hardware.
Accurate single-volume delivery is the foundation of analytical chemistry; to further enhance your laboratory system, we recommend exploring these related categories:
- Pipette Controllers: Use Hirschmann Pipetus or BRAND Macropipette controllers for the safest and most efficient way to fill glass volumetric pipettes.
- Graduated Pipettes: Utilize Hirschmann graduated models for tasks requiring variable volume delivery from a single glass instrument.
- Microlitre Pipettes: Explore Eppendorf Reference 2 G systems for micro-volume transfers that require the speed of a mechanical pipettor.
- Pipette Balls: Use LLG Safety Pipetting Balls for a manual, traditional approach to liquid aspiration.
Unsure if your application requires the accuracy of a Class AS pipette or a standard Hirschmann Class B model? Our team provides local technical support to help you find the correct volumetric solution with fast shipping and competitive pricing.
Frequently Asked Questions
1. What is the difference between Class A and Class B volumetric pipettes?
Class A (or AS) pipettes are manufactured to the highest accuracy standards with the tightest volume tolerances, while Class B pipettes, such as the Hirschmann AR-glass series, have wider tolerances and are suitable for routine educational or general laboratory use.
2. Why are some graduations amber or brown?
Amber or brown graduations are permanently diffused into the glass surface, making them highly resistant to aggressive cleaning agents and providing better contrast when viewing clear liquids.
3. Can these pipettes be used with electronic controllers?
Yes, all standard glass volumetric pipettes are compatible with electronic fillers like the Hirschmann Pipetus Accu, which allows for more controlled aspiration and dispensing compared to manual bulbs.
4. What does "TD" or "Ex" mean on a pipette?
These markings indicate that the pipette is calibrated "to deliver." This means the volume indicated on the pipette is the exact amount that will leave the tip when the liquid is allowed to flow out under gravity.
