ISO 594-1 Luer Gauges

ISO 594-1 Luer Gauges. ISO 594-1 — Conical fittings with a 6 % (Luer) taper for syringes, needles and certain other medical equipment — Part 1: general requirements. It is the reference luer side of the interface. Kingpo machines reference connectors and gauges in-house from hardened steel, inspects them against the figure before despatch and supplies them with a calibration certificate.

What it is used for

• Dimensional and mechanical checks on the connector under test
• Repeatable mating with the sample so results are comparable between laboratories

ISO 594-1:1986 was cancelled and replaced by ISO 80369-7:2016. Gauges to ISO 594-1 remain in service for legacy product lines and for markets that still reference the older edition.

Specification

How the test is run

1. Condition the reference connector and the sample together at the test temperature stated in the standard.
2. Mate the sample to the reference connector with the axial force or torque the standard specifies — never by hand feel alone.
3. Apply the test medium. Leakage tests use liquid under positive pressure or air under sub-atmospheric pressure; mechanical tests use a tensile or compressive load at a controlled rate.
4. Hold for the dwell time in the standard and record the reading.
5. Repeat for the number of samples the protocol calls for and report the worst case, not the average.

Reference connectors are inspection tools. Overriding tests and repeated axial-load tests wear them by design — plan replacement against test cycles.

Choosing the right figure

Annex C (and the equivalent annexes in the other parts) assigns one figure per reference connector, and each figure is certified for a specific set of tests. Picking the wrong one is the most common specification error in this category: the connectors look almost identical, but a figure that is certified for leakage is not the one you use for separation from axial load. Order against the figure number in your test protocol, not against the photograph.

What this is not

A reference connector is not a complete test system. Leakage, sub-atmospheric air leakage and separation-force tests need pressure, vacuum or force applied through ISO 80369-20 test apparatus. It is also not a simple go/no-go dimensional gauge: for a quick fit check on a conical fitting you want a plug gauge or a ring gauge, not a reference connector.

Frequently asked questions

Is ISO 594 still current?

ISO 594-1:1986 and ISO 594-2:1998 were cancelled and replaced by ISO 80369-7:2016, which consolidated and technically revised them. Gauges to ISO 594 remain in service for legacy product lines. If you are writing a new protocol, reference ISO 80369-7.

Can I use one reference connector for several tests?

Only the tests the figure is certified for. Different figures are machined to different limits and, in some cases, to different materials, because the test loads differ.

Do you supply the test apparatus as well?

Yes. Kingpo builds the ISO 80369-20 apparatus — leakage, sub-atmospheric air leakage, separation force and unscrewing torque — alongside the reference connectors.

Is a calibration certificate included?

Yes, and we re-calibrate reference connectors you already hold.

Related gauges and equipment

Other gauges and test equipment to the same standard:

• ISO594-1 Fig 3b Ring Gage For Male Luer Connectors
• Iso594-1 Standard Fig 3c Plug LUER Gauge For Female Luer Connectors

Send the standard, figure number and quantity to Kingpo technical sales for a quotation and delivery date.