At the bench · 3 min read
Choosing the Right Syringe & Needle
The right syringe makes accurate, clean work easy. Here’s how to pick one for the bench — general handling information for laboratory use.
Gauge and length
Gauge is needle thickness — a higher number is thinner (a 31G is finer than an 18G). Fine gauges suit delicate, low-volume work; a wider draw-up needle (e.g. 18G) fills a syringe quickly from a vial.
Many benches keep a wide draw-up needle for filling and a fine needle for precise transfers.
Volume and units
Insulin syringes are marked in U-100 units: 100 units = 1 mL, so 50 units = 0.5 mL. Pick a barrel size close to your typical volume for the most precise reading.
For larger transfers, a luer-lock syringe with a separate needle gives more flexibility.
Single-use and sterile
Use a fresh, sterile syringe and needle for each draw, and dispose of sharps in a proper container. We stock insulin syringes, draw-up needles, luer-lock syringes, and sharps containers.
Don’t re-cap or reuse — single-use is the simplest way to keep work clean and safe.
For laboratory use. Information for handling — not medical, dosing, or administration guidance.