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  3. ZORO SELECT BR2128-25

ZORO SELECT BR2128-25 Burette Ptfe Stopcock

Br2128-25 Zoro Select Burette Class A Ptfe Stopcock 25 Ml

( Brand: Zoro Select ), ( Manufacturer Part Number: BR2128-25 ), ( Country Of Origin: In ), ( Material: Ptfe ), ( Color: Clear ), ( Type: Lab Instruments Burettes ), ( Weight: 0.4000 ), ( Length: 24.000 ), ( Width: 4.000 ), ( Features: 25ml Class A Burette, Per Astm E287. Meets Usp Standards And Is I ), ( Battery Included: No )

Review ZORO SELECT Burette Class Ptfe Stopcock Ml

The **Zoro Select BR2128-25 PTFE Stopcock Burette** is a precision-engineered laboratory instrument designed for accurate and reliable volumetric measurements in chemical titrations, standardizations, and analytical procedures. Crafted with meticulous attention to detail, this 25 mL glass burette features a **PTFE (polytetrafluoroethylene) stopcock**, a material renowned for its exceptional chemical resistance, low permeability, and durability, making it ideal for handling aggressive solvents, acids, and bases without degradation or contamination. The stopcock s smooth, self-lubricating PTFE construction ensures minimal friction and consistent flow control, reducing the risk of clogging or erratic dispensing that can compromise titration accuracy. The burette itself is constructed from **borosilicate glass (Type I)**, a material celebrated for its thermal stability, resistance to chemical corrosion, and optical clarity, which allows for precise reading of meniscus levels even under varying lighting conditions. The **25 mL capacity** provides a versatile range for a wide array of laboratory applications, from routine titrations to specialized analytical work where moderate volume precision is critical.

The design incorporates a **graduated scale etched directly onto the glass**, ensuring durability and resistance to abrasion, while the **fine, evenly spaced markings** (typically 0.1 mL increments) enable accurate readings with minimal parallax error. The stopcock s **knurled handle** allows for easy, one-handed operation, reducing the likelihood of spills or misalignment during use. To further enhance usability, the burette is equipped with a **standard 24/40 joint**, compatible with most laboratory glassware and adapters, facilitating seamless integration into existing workflows. The **PTFE stopcock** also features a **self-sealing mechanism**, which minimizes drips and ensures that the burette can be left in a partially filled state without risking contamination or loss of sample. This model is particularly well-suited for laboratories requiring **high-purity measurements**, as PTFE is inert to a broad spectrum of chemicals, including strong oxidizing agents, halogens, and organic solvents, making it an excellent choice for demanding applications in chemistry, pharmaceuticals, and environmental testing.

For added convenience, the Zoro Select BR2128-25 is often supplied with a **plastic or metal protective cap** to shield the stopcock from dust, moisture, and accidental damage when not in use. The burette s robust construction and reliable performance make it a dependable tool for both educational and industrial settings, where consistency and precision are paramount. Whether used in routine quality control, academic research, or industrial manufacturing, this burette delivers the accuracy and reliability expected in modern analytical laboratories. Its combination of **high-quality materials, precise engineering, and user-friendly features** ensures that it remains a cornerstone of volumetric analysis for years to come.

### **Pros and Cons of buying a Zoro Select BR2128-25 PTFE Stopcock Burette (25 mL)**

#### **Pros:**

1. **Precision and Accuracy** Burettes are designed for precise liquid measurements, making them essential in laboratories where accuracy is critical (e.g., titrations, chemical analysis).

2. **Durable Construction** The PTFE (polytetrafluoroethylene) stopcock ensures resistance to corrosion, chemical resistance, and longevity, reducing the need for frequent replacements.

3. **Easy to Clean** The smooth PTFE surface prevents liquid residue buildup, simplifying cleaning and maintenance compared to glass stopcocks.

4. **Compatibility with Various Chemicals** PTFE is inert to most acids, bases, and organic solvents, making this burette suitable for a wide range of experiments.

5. **Standardized Size (25 mL)** The 25 mL capacity is a common volume for many laboratory procedures, ensuring compatibility with standard lab protocols.

6. **Cost-Effective for Bulk Use** While not the cheapest option, it is reasonably priced for a durable, high-quality burette, especially when considering its long-term reliability.

7. **Brand Reputation (Zoro)** Zoro is a well-known supplier of lab equipment, offering reliable products with good customer support and warranties.

#### **Cons:**

1. **Higher Upfront Cost** Compared to basic glass burettes, this PTFE stopcock model is more expensive, which may be a concern for budget-conscious buyers.

2. **Limited Temperature Resistance** While PTFE is chemically resistant, it has a lower temperature tolerance than some other materials (e.g., borosilicate glass). Extreme heat could degrade the PTFE over time.

3. **Potential for Leaks** If the PTFE stopcock is not properly seated or if the rubber gasket wears out, leaks may occur, requiring occasional maintenance.

4. **Not Ideal for High-Pressure Applications** The stopcock mechanism may not handle high-pressure dispensing as effectively as specialized glass stopcocks with ground joints.

5. **Less Common in Some Labs** Some laboratories may already have standard glass burettes, making this PTFE model an unnecessary upgrade unless chemical resistance is a priority.

6. **Maintenance Dependency** The PTFE stopcock must be periodically checked for wear and lubricated (if required) to ensure smooth operation, adding slight maintenance overhead.

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### **Conclusion:**

The **Zoro Select BR2128-25 PTFE Stopcock Burette** is an excellent choice for laboratories dealing with **corrosive chemicals, aggressive solvents, or frequent use where durability is key**. Its **chemical resistance, ease of cleaning, and precision** make it a reliable investment for long-term use. However, if **cost is a major concern** or if the lab primarily handles **non-corrosive liquids**, a standard glass burette may suffice.

For **research labs, chemical analysis, or environments with harsh reagents**, this burette is highly recommended due to its **superior resistance and longevity**. For **general educational or low-budget labs**, the added cost may not be justified unless chemical compatibility is a critical factor.

### **Final Recommendation:** **Buy this burette if:**

- You work with **acids, bases, or organic solvents** that could damage glass or rubber stopcocks.

- You need a **long-lasting, low-maintenance** solution for precise liquid measurements.

- Your lab prioritizes **chemical resistance and durability** over cost savings.

**Avoid this burette if:**

- You are on a **tight budget** and can use a standard glass burette instead.

- Your applications involve **only water, dilute solutions, or non-corrosive liquids**.

- You require **high-temperature resistance** (PTFE has limitations in this regard).

For most **serious laboratory settings**, this burette is a **strong, practical choice** that justifies its cost through reliability.

Details:

Graduated at intervals of 0.10ml, with a waiting time 30 seconds. Burette, Class A, PTFE Stopcock, 25 mL, BR2128-25: 25ml A burette, per ASTM E287. Light Industrial. Meets USP standards and is individually certified.

Electrical Outlet's. Electrical Boxes. Manufactured from precision bore tubing; calibrated to deliver TD, Ex on computer-controlled machines. Includes PTFE straight bore stopcock.

Receptacles. And Enclosures.

part #: br212825 price

  • $114.99

specifications plasticwarelabsuppy:

  • brand: Zoro Select
  • mpn: Br2128-25
  • country of origin: In
  • material: Ptfe
  • color: Clear
  • type: Lab Instruments Burettes
  • weight: 0.4000
  • length: 24.000
  • width: 4.000
  • features: 25ml Class A Burette, Per Astm E287. Meets Usp Standards And Is I
  • battery included: No

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  • Medical, Lab Dental Supplies > Glassware Plasticware > Other Medical Lab Glassware
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offer plasticwarelabsuppy:

  • quantity: 3
  • started: February 15, 2026
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country of origin: in, type: lab instruments burettes, length: 24.000, features: 25ml class a burette, per astm e287. meets usp standards and is i, battery included: no,
category: business & industrial > medical, lab dental supplies > glassware plasticware > medical lab glassware, color: clear, weight: 0.4000, material: ptfe, width: 4.000, sku: 13295877115812722,
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