The Measure of Excellence Codes and Explanations
Several different needle point styles are offered on HAMILTON syringes and needle products depending on the application. The standard needles are manufactured from stainless steel and optimized according to use and syringe capacity. They have a standard length of 51 mm and point style 2 or 3.
Standard diameters available are: Gauge 26s for 5 µl and 10 µl syringes. Gauge 22s for 25 µl to 250 µl syringes. Gauge 22 for syringes 500 µl and above.
Syringes and needles manufactured by HAMILTON are intended for scientific research and laboratory use only and are not intended for human in vivo use.
Point styles (pst)
pst2 This is the standard point style suitable for all chromatographic applications. 10-12° bevelled, non-coring needle point, recommended for septum penetration. (Only needle gauges from 22 to 26s are ideal for septum penetration.)
pst3 This needle has a 90° bevel and is mainly used in HPLC injection valves. It is recommended for sample pipetting and where precision dosing is required (e.g. thin layer chromatography).
pst4 This needle is cut at an angle of 10-12° and has a sharp point for animal injections.
pst5
Conical needle with closed end and a side hole. The closed end prevents the needle from being plugged when septa are penetrated (coring). Pst5 needles are available from gauges 10 to 26s. Ideal for penetration of septa, thin-gauged vinyls and plastic without coring.
pstAS The needles have an 8° cone. They have been designed to penetrate GC Autosampler septa. AS standard needles are available in gauges 26, 26s, 23, 23s, 22, 22s. Other dimensions on request.
The needles are electro-polished and electro-tapered. This is a manufacturing process that electrochemically removes the needle material and eliminates burrs. This process is used for pst2 and pst3 needles and minimizes damage to septa during penetration. Needles can be electro-tapered from gauges 10 to 26s. SN needles are only tapered on request.
T H E ME A S U R E O F E X C E L L E N C E TM - 10 -
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