GRADUATED PLASTIC BEAKER

Laboratory Plastic Beakers

Why Choose a Polypropylene Beaker

Pobel's laboratory plastic beakers are exclusively molded from virgin, laboratory-grade polypropylene (PP). This polymer combines very low weight with impact resistance, preventing chipping and breakage even after accidental drops. Additionally, it is chemically inert to most aqueous solutions, salts, and buffers, and withstands autoclave cycles at 135 °C without warping or partial loss of transparency. This simplifies routine sterilization in microbiology, analytical chemistry, and quality control.

The smooth inner wall prevents analyte adsorption, while the external screen-printed scale is applied with ceramic ink resistant to alkaline detergents, ensuring reliable volume readings even after numerous washes. The spout, integrated into the piece during injection molding, channels the flow for drip-free pouring without turbulence that could compromise measurements.

Pobel's Manufacturing Process and Quality Control

Each batch is injected into polished steel molds that ensure uniform wall thickness and eliminate burrs. After molding, the beakers undergo controlled annealing to relieve internal stresses and stabilize geometry before being subjected to:

• Drop test from 1 m onto a hard surface (ISO 9092), with no visible cracks accepted.

• 30-minute autoclave cycle at 135 °C, followed by visual inspection to confirm scale contrast and accuracy.

• Chemical inertness tests with acidic (pH 2) and basic (pH 12) solutions for 24 hours, verifying no leaching of additives and no mass change exceeding 0.1%.

Only units that pass these tests receive the Pobel marking and are packaged in heat-sealed bags for protection during transport.

Available Capacities and Designs

The range includes capacities from 50 ml to 2,000 ml, in two main geometries:

• Low-form beaker (Griffin type): wide mouth facilitates the introduction of spatulas, electrodes, and magnetic stirrers.

• Tall-form beaker (Berzelius type): slender profile reduces evaporation and improves phase decantation.

Sterile batches—packaged in an ISO 7 cleanroom—are available in 250 ml, 500 ml, and 1,000 ml capacities, ready for use in cell culture or microbiological control.

Recommended Applications in Teaching, Industry, and Field Work

Pobel’s PP beakers perform exceptionally in buffer preparation, sample transport, density measurements with hydrometers, and pH testing in the field. In classrooms and educational laboratories, they drastically reduce replacements due to breakage, while in pilot plants for cosmetics, detergents, or environmental analysis, they enable safe handling of cold formulations. Their lightweight construction reduces fatigue during repetitive pouring and transfer tasks between hoods or weighing areas.

Glass Beakers vs. Laboratory Plastic Beakers

Borosilicate glass and polypropylene serve complementary needs.

• Pobel's borosilicate glass beakers withstand temperatures up to 500 °C, offer absolute optical clarity, and near-total chemical inertness, making them the choice for direct flame reactions, calcination, or prolonged contact with hot organic solvents.

• Polypropylene excels where impact safety, lightness, and low replacement costs are critical. Although its thermal limit is lower and it cannot be exposed to flame, its mechanical resistance and ease of sterilization make it ideal for aqueous samples, buffers, and field work.

In practice, many laboratories combine both materials: PP for preliminary steps or sample logistics, and borosilicate for stages that demand intense heat or perfect visual reading of the meniscus. Pobel manufactures and supplies both types, ensuring each technique has the optimal vessel.

Technical Advice and Quotation Requests

Choosing the right beaker requires evaluating maximum temperature, chemical aggressiveness, sample volume, and handling frequency. Send this information through the form in this category or by email, and our technicians will prepare a personalized proposal with ISO 3819 datasheets, pricing, and lead times. The service is fully personalized: we analyze your workflow and suggest the reference that optimizes safety, productivity, and budget.

Explore Pobel's collection of laboratory plastic beakers and discover why thousands of institutions trust our quality to work with precision and peace of mind.