The 50 mL digital burette is a precision instrument key to titration experiments and volumetric analysis. This guide highlights five top EISCO options, focusing on accuracy, durability, and user-friendly features like PTFE stopcocks, glass clarity, and clear graduations. Each product is described with its standout specifications to help researchers, educators, and students compare performance and suitability for demanding lab work.
| Product | Brand | Capacity | Accuracy / Tolerance | Key Feature |
|---|---|---|---|---|
| EISCO Burette, 50ml – Class A | EISCO | 50 mL | ±0.05 mL | BorOSC 3.3 glass, PTFE stopcock |
| EISCO Burette, 50mL – Class B | EISCO | 50 mL | ±0.10 mL | PTFE stopcock, blue graduations |
| Eisco Labs 50mL Class A | EISCO | 50 mL | ±0.05 mL | ISO 385 certified, PTFE key stopcock |
| EISCO 50mL Acrylic Burette | EISCO | 50 mL | ±0.10 mL | Plastic acrylic body, blue graduations |
| EISCO Class A 50mL Borosilicate | EISCO | 50 mL | ±0.05 mL | 9.5 mm ID, glass key stopcock |
Note: All products listed are designed for rigorous laboratory use with borosilicate glass bodies, precise graduations, and dependable stopcocks. When selecting, consider accuracy class (A vs B), material durability, and whether a glass or acrylic burette best suits your workflow and chemical resistance needs.
EISCO Burette, 50ml – Class A (Blue Graduations)
Class A 50 mL burette built from borosilicate 3.3 glass. Features a straight bore and a PTFE stopcock for smooth liquid flow. ISO/DIN Class A accuracy is rated at ±0.05 mL, ensuring precise titration results. The glass construction provides chemical resistance and autoclavability for repeated sterile use. Graduations are clearly printed in blue at 0.1 mL intervals, aiding quick readings in busy lab environments. This model is designed for high durability and reliable performance in demanding chemical work.
EISCO Burette, 50mL – Class B
Class B burette with a 50 mL capacity and a tolerance of ±0.10 mL, conforming to DIN ISO 385 standards. It includes an attached PTFE straight bore stopcock for smooth operation. Blue graduations provide easy readability, and the Class B designation suits routine titration tasks where extreme precision is less critical than cost-effectiveness and volume handling. This model offers solid performance with standard robustness for general chemistry labs and instructional settings.
Eisco Labs 50mL Class A Burette
ISO 385 batch-certified Class A burette with 50 mL capacity and a ±0.05 mL tolerance. The borosilicate 3.3 glass provides resistance to chemicals and thermal stress. A precise PTFE key stopcock offers controlled flow, ideal for accurate titration workflows. The burette is noted for durability in frequent-use labs and high-stress environments, supporting consistent results in long experiments.
EISCO Acrylic 50mL Burette – Class B
This five-pack brings five 50 mL acrylic burettes designed for classroom use and teaching labs. Class B tolerances of ±0.10 mL align with ISO 385 standards for accessibility and affordability. The burette features a blue, easy-to-read printed scale in 0.1 mL increments, suitable for demonstrations and basic titration exercises. The acrylic body makes these units lighter and cost-effective options for students and beginners.
EISCO Class A 50mL Borosilicate Burette
50 mL Class A burette with borosilicate glass, 9.5 mm inner diameter, and a glass key stopcock. It offers ±0.05 mL tolerance and 0.10 mL graduations, meeting Class A DIN/ISO 385 requirements for precision. The straight bore and robust construction are optimized for accurate titration experiences, while the glass key stopcock ensures reliable control of liquid flow in advanced experiments.
Buying Guide
Key considerations when choosing a 50 mL burette:
- Accuracy class: Choose Class A for high-precision titrations (±0.05 mL) or Class B for routine work (±0.10 mL).
- Glass type: Borosilicate 3.3 offers chemical resistance and temperature tolerance; acrylic bodies are lighter and more affordable but less chemically resistant.
- Stopcock material: PTFE stopcocks provide smooth operation and chemical compatibility; ensure the stopcock is easily adjustable without leaks.
- Graduations: Readability matters; 0.1 mL increments are standard, with blue or white markings improving contrast against the glass.
- Durability: Autoclavable glass burettes withstand sterilization; consider lab frequency and environmental rigor.
- Size and form factor: Straight bore designs generally yield consistent flow; confirm inner diameter and total height for storage and workflow fit.
- Maintenance: Look for units with interchangeable parts or readily available spare stopcocks and seals to minimize downtime.
Comparative highlights:
- For top-tier accuracy and durability, Class A borosilicate burettes with PTFE stopcocks are standard in research and teaching labs.
- Class B models offer cost-effective options suitable for routine titrations and classroom demonstrations.
- Acrylic burettes are ideal when weight and low cost are priority, but avoid highly reactive chemicals where glass is preferred.
Practical tips for use and maintenance: calibrate periodically using standardized solutions, store burettes vertical to prevent drips, and replace worn seals to maintain accuracy. Always follow manufacturer instructions for cleaning and sterilization to extend instrument life.