AMPTEC Research · Accessories & Test Lead Sets
630-406S
Heavy Duty Spear Kelvin Probe Set (5 ft) for the AMPTEC 630 / 640 / 641 Series ruggedized units
630-406S is a 5 ft heavy-duty Kelvin probe set with spear tips and a Trident connector on the instrument end. It fits every AMPTEC 630 / 640 / 641 Series unit and any tester with Trident terminals. A 10 ft version is sold as 630-405S.
Overview
The shorter spear-tip set for heavy structures, when 10 ft of total reach is enough and weight matters. Leads are 5′ per lead (10′ total span); the set weighs 2.5 lb. Operating 0° to 50° C, storage -10° to 70° C. Other lengths and tip types are built to order. Evencat is the sole distributor for AMPTEC Research in Taiwan and quotes accessories together with the instruments.

Key specifications
| Category | Accessory · 630 Series accessories |
|---|---|
| Cable length | 5′ per lead (10′ total span) |
| Weight | 2.5 lb |
| Instrument connector | Trident connector |
| Tip or clip type | Gold-plated single spear tips |
| Operating temperature | 0° to 50° C |
| Storage temperature | -10° to 70° C |
| Compatible instruments | All AMPTEC 630 / 640 / 641 Series models (630BN, 630ES, 640N, 641N, 641RS), plus any tester with Trident terminals |
| Manufacturer | AMPTEC Research (made in the USA) |
Features
Spear tips
A spear tip gives a firm single-point contact for ground and bond checks on heavy structures.
5 ft short version
5 ft per lead, 10 ft total span, lighter than 630-405S. Choose the 10 ft version for widely spaced test points.
Trident connector
Matches the AMPTEC 630 / 640 / 641 ruggedized units and any tester with Trident terminals.
Custom lengths and tip types
AMPTEC builds other lengths and tips to order. Describe the application and we confirm spec and lead time with the factory.
Compatible instruments and applications

FIELD
Defense, aerospace and shipboard work
Firing circuits, electro-explosive devices and ground bonds are measured on site, where contact shapes and distances vary. The right tip and lead length are what make readings repeat.


LAB
Calibration and QA labs
A 4-wire Kelvin connection to a resistance standard or the device under test removes lead and contact resistance from the reading.
QA
Ordnance and pyrotechnics production QA
Batch sampling needs fast, repeatable contact. Keep several lead sets with different tips on hand and swap to match the terminal.

Options and configuration
Tick the items you need. We compile the configuration into a list and carry it into the quote request form.
Standard (included)
Options and custom builds
Pair with an instrument
Downloads
Appearance, lead length or battery brand may differ slightly from the picture; the item AMPTEC ships governs. Custom lengths and tips on request through Evencat.
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