Funnels

Precision Liquid Transfer with Laboratory Funnels

You know that moment when you're trying to transfer a solution without spilling half of it on the bench? Yeah, that's where a good funnel becomes your best friend. Our borosilicate glass funnels are built for the daily grind of lab work—whether you're doing routine transfers or setting up a filtration that needs to run overnight.

The 60° angle walls aren't just for show. They actually help with flow dynamics and make sure you're getting complete sample recovery, which matters when you're working with expensive reagents or samples you can't afford to lose. These meet ISO 3585 standards, so you're getting consistent quality that'll hold up to autoclaving and whatever chemicals you throw at them.

Stem Length and Diameter Specifications

Stem dimensions really do matter, especially when you're trying to fit a funnel into a specific flask setup. We've got sizes ranging from 25mm to 150mm diameter, and the stems are precision-molded with consistent bore diameters so you don't get that annoying drip-drip-drip that backs up your whole process.

Short stems work great when you're transferring into Buchner Flasks for vacuum filtration setups, while longer stems give you better control for deep containers. If you need something with more control for separations, you might want to check out a Separatory Funnel or the Funnel Separatory pear shape instead—those come with PTFE screw stopcocks for precise flow control.

Smooth vs Ribbed Interior Surface Options

Here's something people don't always think about: interior surface texture. Smooth interiors are what you want for:

• Complete drainage with minimal sample loss
• Quantitative work where every drop counts
• Easy cleaning between uses

Ribbed interiors have their place too—they prevent filter paper from sealing against the glass and blocking airflow during gravity filtration. Just depends on what you're doing that day.

Applications Across Different Laboratory Procedures

Standard funnels handle your everyday liquid transfers and gravity filtration with filter paper. For gravimetric analysis, you'll want the smooth interior type to ensure complete sample transfer. When you're doing solvent extractions or need to separate immiscible liquids, grab a Funnel Separatory pear shape ISO4800 instead—it's designed specifically for that.

Pharmaceutical testing and quality control work? These funnels pair well with Hollowed glass stoppers to create closed systems when needed. They're autoclavable and dishwasher safe, which makes life easier when you're processing multiple samples and need quick turnaround on clean glassware.