Magnetic Stir Bar Set 7pcs CHSZCHC Lab Type B Mixed Sizes PTFE

Description

Product Overview

The CHSZCHC 7‑piece Magnetic Stir Bar Set is engineered for demanding laboratory environments where precision, durability, and chemical resistance are essential. Each set includes seven PTFE‑coated stir bars ranging from 5 × 10 mm up to 9 × 35 mm, providing a versatile selection of sizes that accommodate a wide variety of vessel diameters and volumes. The bars are fabricated from high‑grade stainless steel cores and feature a seamless Teflon (PTFE) coating that prevents contamination and ensures smooth, low‑friction rotation during magnetic stirring.

Designed to withstand extreme conditions, these stir bars maintain structural integrity from –196 °C (liquid nitrogen temperature) up to 250 °C, making them suitable for both cryogenic and high‑temperature applications. The PTFE surface offers exceptional resistance to acids, bases, and a broad spectrum of organic solvents, virtually eliminating the risk of degradation or leaching that could compromise experimental results. Each bar is calibrated for optimal magnetic coupling, reducing vibration and wear on both the bar and the stir plate.

Compact packaging dimensions of 2.2 × 1.34 × 0.43 inches and a lightweight design of 1.13 oz per set facilitate easy storage and rapid deployment in busy laboratory settings. The set is fully compatible with standard magnetic stir plates and hotplates, ensuring seamless integration with existing equipment without the need for additional adapters or modifications.

Usage

These magnetic stir bars are ideal for a broad spectrum of laboratory tasks, including solution preparation, reagent mixing, cell culture media agitation, and analytical chemistry procedures such as titration and spectrophotometric analysis. Their varied size range allows users to select the optimal bar for the specific flask, beaker, or micro‑tube, guaranteeing efficient mixing even in low‑volume or high‑viscosity solutions.

In biological research, the PTFE coating provides a chemically inert surface that prevents adsorption of proteins or nucleic acids, preserving sample integrity during prolonged incubations. For chemical synthesis, the bars’ high temperature tolerance enables reliable stirring of reactions that require heating above 200 °C, while the low‑temperature capability supports cryogenic processes without loss of magnetic performance.

When using the stir bars, it is recommended to match the magnetic stir plate speed to the viscosity of the solution to avoid excessive turbulence. After each use, the bars should be rinsed with appropriate solvents and dried to maintain the PTFE coating’s protective properties. Proper handling ensures a long service life and consistent performance across thousands of stirring cycles.

Why Choose Us

CHSZCHC manufactures these stir bars at the Shenzhen Haocheng Instrument Co., Ltd. facility, where rigorous quality control protocols are applied at every production stage. The PTFE coating process utilizes advanced polymerization techniques that guarantee uniform thickness and adhesion, resulting in a surface that is both chemically inert and mechanically robust.

Customer feedback highlights a 4.6‑star rating from over 480 reviews, reflecting high satisfaction with product reliability, consistency, and value. The set’s ranking as #7 in the Lab Stirrer Bars category underscores its popularity among professionals who demand dependable magnetic stirring solutions for routine and specialized laboratory work.

We stand behind our products with responsive after‑sales support, offering technical assistance, replacement parts, and a satisfaction guarantee. Our commitment to continuous improvement ensures that each batch meets the exacting standards required for modern scientific research.

Key Features

• Seven PTFE‑coated stir bars in mixed sizes provide flexibility for vessels of all diameters.
• Exceptional chemical resistance to acids, bases, and organic solvents prevents contamination.
• Wide temperature range from –196 °C to 250 °C supports both cryogenic and high‑heat applications.
• Low‑vibration design reduces wear on both the stir bar and magnetic stir plate, extending equipment life.
• Dedicated customer support and warranty ensure reliable service and peace of mind.

FAQ

What sizes are included in the 7‑piece set?

The set contains bars measuring 5 × 10 mm, 6 × 12 mm, 8 × 20 mm, 7 × 25 mm, 8 × 28 mm, 8 × 30 mm, and 9 × 35 mm, covering a broad range of vessel diameters for versatile laboratory use.

Can these stir bars be used with any magnetic stir plate?

Yes, the bars are compatible with standard magnetic stir plates and hotplates that use a rotating magnetic field. They work with most laboratory stirrers without requiring special adapters.

How should I clean and maintain the PTFE coating?

After each use, rinse the bars with a suitable solvent (e.g., ethanol or distilled water), gently scrub with a soft brush if needed, and dry thoroughly. Avoid abrasive cleaners that could damage the PTFE surface.

What is the temperature and chemical resistance range?

The PTFE coating remains stable from –196 °C up to 250 °C and resists degradation from strong acids, bases, and a wide variety of organic solvents, making it suitable for most laboratory environments.

Is there a warranty or after‑sales support?

CHSZCHC provides a comprehensive warranty and responsive technical support. Users can contact our service team for troubleshooting, replacement parts, or any product‑related inquiries.