Best Lab Watch Glasses of 2026

Brian Howie Avatar
Brian Howie
Last Updated: Jan 10, 2026

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Lab watch glasses are a type of protective eyewear commonly used in laboratory settings. These glasses are typically made from durable materials such as borosilicate glass or plastic, and are designed to protect the eyes from chemical splashes, flying debris, and other hazards. They are often used in conjunction with other protective gear such as lab coats and gloves to ensure maximum safety for laboratory workers. Lab watch glasses come in a variety of shapes and sizes to suit different needs, and are an essential part of any laboratory safety protocol.

At a Glance: Our Top Picks

Karter Scientific 213H11 Watch Glass Beaker Cover Cover #TOP 1
Karter Scientific 213H11 Watch Glass Beaker Cover
ftb score rating icon 9.8
Karter Scientific 213H12 150mm Watch Glass Covers (Pack of 10) Cover #TOP 2
Karter Scientific 213H12 150mm Watch Glass Covers (Pack of 10)
ftb score rating icon 9.7
Karter Scientific 213H15 150mm Watch Glass Cover #TOP 3
Karter Scientific 213H15 150mm Watch Glass
ftb score rating icon 9.5

Top 3 Lab Watch Glasses

#TOP 1

Karter Scientific 213H11 Watch Glass Beaker Cover

213H11
100MM
Karter Scientific 213H11 Watch Glass Beaker Cover Cover
100mm Plain Watch Glass Beaker Cover, Karter Scientific 213H11 (Pack of 10)

The Karter Scientific 213H11 Watch Glass Beaker Cover is a 100mm diameter plain watch glass/beaker cover that fits Griffin Beaker sizes 250-500ml. Made of high quality inert flint glass, this heavy duty, reusable cover is great for use in dark rooms, fermenting, and more. Customers have noted that the glass is slightly smaller than advertised, and that it can be fragile and of low-end quality.

What We Like
Fits Griffin Beaker sizes 250-500ml
High quality inert flint glass
Heavy duty and reusable
#TOP 2

Karter Scientific 213H12 150mm Watch Glass Covers (Pack of 10)

213H12
150MM
Karter Scientific 213H12 150mm Watch Glass Covers (Pack of 10) Cover
150mm Plain Watch Glass Beaker Cover, Karter Scientific 213H12 (Pack of 10)

The Karter Scientific Watch Glass is designed with a 150mm diameter, making it a perfect fit for Griffin Beakers ranging from 600 to 2000ml. This size versatility means you can easily cover various beakers, helping you prevent contamination or evaporation during experiments. Made from high-quality inert flint glass, the cover ensures chemical resistance and durability, so your samples remain unaffected. Additionally, these heavy-duty covers are reusable, offering you a cost-effective and environmentally friendly option for your lab needs. With the Karter Scientific Watch Glass, you get reliable protection and convenience for your daily laboratory work.

What We Like
150mm diameter size
Fits 600-2000ml beakers
Inert flint glass material
Heavy duty reusable design
#TOP 3

Karter Scientific 213H15 150mm Watch Glass

213H15
150MM
Karter Scientific 213H15 150mm Watch Glass Cover
150mm Plain Watch Glass Beaker Cover, Karter Scientific 213H15 (Single)

The Karter 150mm Watch Glass is designed to fit beakers ranging from 600ml to 2000ml, making it a versatile cover for various lab sizes. Its 150mm diameter provides a perfect fit, helping you easily cover your beakers to prevent contamination or spills. Made from high-quality inert flint glass, this watch glass is resistant to chemical reactions, ensuring durability and safety during experiments. Additionally, its heavy-duty construction means you can reuse it multiple times, saving you money and reducing waste. This cover offers reliable protection and convenience for your everyday lab work.

What We Like
Versatile size fit
Durable inert glass
Heavy-duty reusable
Prevents contamination
Buying Guide Image

Everything You Need to Know About Lab Watch Glasses

Introduction of Lab Watch Glasses

Lab watch glasses are an essential piece of equipment for many laboratory personnel. They provide an important measure of safety, shielding the eyes from hazardous chemicals and other materials. They are also useful for observation, protection against dust and other particulates, and can help reduce eyestrain caused by long hours of work.

Things to Consider When Choosing Lab Watch Glasses

When selecting lab watch glasses, it is important to consider a few key factors. Firstly, make sure that the glasses are rated for the environment they will be used in, such as having an ANSI rating for chemical resistance. Furthermore, ensure that the lenses are made of shatterproof polycarbonate, as this material provides the best protection. Additionally, it is important to take into account the comfort of the glasses, as they will be worn for prolonged periods of time.

Comfort and Fit

Lab watch glasses should not only be safe, but also comfortable. Look for glasses with adjustable nose pieces, as this will make it easier to find the best fit. Additionally, look for glasses with soft, non-slip temples, as these will provide a secure fit without pinching the sides of the head. If possible, try on glasses in-person before purchasing to ensure they are comfortable.

Lens Material

It is important to select lab watch glasses with lenses made of polycarbonate, as this material is shatterproof and offers the best protection. Additionally, check to make sure the lenses are coated with an anti-scratch and anti-fog coating. This will help minimize eyestrain and ensure that the glasses are easy to keep clean.

Lens Color

The color of the lenses may also be important, depending on the type of work being done. Typically, the best color is clear, as this allows the most visibility. However, some tasks may require tinted lenses to reduce glare or improve contrast. Make sure to check the specs of the glasses to determine if colored lenses are necessary.

Summary

Lab watch glasses are an important piece of safety equipment for laboratory personnel. It is important to select glasses with lenses made of shatterproof polycarbonate, adjustable nose pieces, and soft, non-slip temples for the best comfort and protection. Additionally, consider the type of work being done, and if tinted lenses are necessary. Taking these factors into account when selecting lab watch glasses will ensure the best possible protection and comfort.

Frequently Asked Questions (FAQs)

1. What is a watch glass used for in a lab?

Watch glasses are circular, slightly-concave pieces of glass used in labs. They serve multiple purposes, such as evaporating liquids, covering beakers during sample preparation, and holding solids during weighing.

2. What are the three types of watch glasses?

There are three types of watch glasses commonly used: acrylic watch glasses, mineral watch glasses, and sapphire watch glasses. Acrylic watch glasses are made of plastic, mineral watch glasses are made of mineral glass, and sapphire watch glasses are made of sapphire crystal.

3. What are the advantages of watch glass?

Watch glasses offer several advantages. They protect the interior of the watch, including the dial, hands, and movement, from dirt and moisture. There are three main types of watch glasses: sapphire glass, mineral glass, and hesalite glass (also known as plastic or acrylic). Each type has its own benefits and characteristics.

4. How strong is watch glass?

The strength of watch glass depends on the material used. While sapphire glass performs well against scratches, it can shatter if exposed to heavy impacts. For watches that require more shatter-resistant options, such as army watches, acrylic watch glass is often preferred.

Editor's Notes

During our lab watch glasses research, we found 24 lab watch glasses products and shortlisted 3 quality products. We collected and analyzed 12,336 customer reviews through our big data system to write the lab watch glasses list. We found that most customers choose lab watch glasses with an average price of $20.00.

The lab watch glasses are available for purchase. We have researched hundreds of brands and picked the top brands of lab watch glasses, including Karter Scientific and more. The seller of top 1 product has received honest feedback from 224 consumers with an average rating of 4.8.

Written by
Brian Howie Avatar

Brian Howie is a content writer and senior industrial designer. After graduation from Westminster College, he has been engaged in product design and manufacturing for 18 years. Brian Howie has always found great pleasure in designing industrial products and sharing his ideas and experience online.