Collection: Syringes & Needles

Microliter syringes use an individually fitted stainless-steel plunger that seals directly against the glass barrel — ideal for homogeneous liquid samples from 0.05 to 500 µL. Gastight syringes add a precision-machined PTFE plunger tip that forms a leak-free seal, so they dispense gases as well as liquids, handle heterogeneous samples, and their plungers can be replaced if damaged.

Cemented needles are permanently bonded for minimal dead volume — the precise, economical default when one needle type does the job. Removable (RN) needles keep the same zero-added dead volume but swap out, which matters when needles clog or you switch gauges often. Luer terminations accept standard hub needles and fittings, trading a little dead volume for maximum flexibility.

For manual GC injection through a septum, a curved-bevel Point Style 2 was the classic choice, but Hamilton's conical Point Style AS penetrates septa more gently and extends septum life up to 10-fold. Most manual HPLC injection valves are designed for a 22 gauge blunt Point Style 3 needle. Side-port Style 5 suits penetrating without coring in autosampler and specialty work.

Hamilton makes dedicated autosampler lines rather than one-size-fits-all: Microliter and Gastight models for Agilent ALS instruments (7693A, 7673, 7683, 6850) and C-Line and S-Line syringes engineered for CTC/LEAP PAL samplers with reinforced plungers for fast injection cycles. Match the sampler model and volume, and the syringe drops in.

Salts and sample residues deposit on the barrel wall, and the near-zero clearance of a fitted Microliter plunger then seizes. Rinse promptly after use, avoid letting samples dry inside the barrel, and move to a Gastight syringe for suspensions and heterogeneous liquids — its PTFE tip tolerates deposits that would lock a fitted steel plunger.

This is the largest Hamilton range in the country: Danyel Biotech, Hamilton's official Israeli distributor, stocks Microliter, Gastight, autosampler syringes, and the full needle program locally, and can match a part number to your instrument. Quotes come from this page in one step.