Coiltek 10 by 5 NOX Coil Review: A Narrower Field for Iron-Infested Ground

Because the narrow axis of an ellipse reduces the width of the detection field without shortening its length, which is exactly the tradeoff dense trash calls for. Coiltek states this coil offers superior sensitivity and pinpointing ability specifically when you need to maneuver tight spots and detect in high trash areas. A round coil of a similar overall size covers more width per sweep and, in doing so, is more likely to sit two nearby targets inside the same field at once. The narrower 10 by 5 inch footprint keeps that overlap smaller, at the cost of needing more passes to cover the same total ground.

That is a straight tradeoff between coverage speed and separation quality, and it is the same tradeoff the coil size vs depth chart sets out for coil selection generally. For dense sites, old house lots, and any ground where the large coil produces blended, ambiguous signals, a narrow elliptical like this one is the usual fix.

Published figures only, and fitment is the column that separates this coil from Minelab's own range most clearly.

Confirm the fitment column before anything else if you own more than one Minelab body.

Two things worth stating plainly before you buy an aftermarket coil for this platform. First, Coiltek publishes this coil as fitting the Minelab Equinox 600, 700, 800 and 900. It does not state the X-Terra PRO in that list, where Minelab own Minelab EQX 11 Coil (11 inch) and Minelab EQX 06 Coil (6 inch) coils do. If you own or plan to own an X-Terra PRO alongside an Equinox, this specific coil is a narrower purchase than it might first appear, and you should not assume it carries over.

Second, this is a third-party product. Coiltek states its own 2 year warranty, which is a reasonable term, and it is a separate warranty from anything Minelab offers on the machine itself. If a fitment or compatibility issue ever arises after a firmware update to the Equinox platform, you are dealing with Coiltek support and a Minelab-made machine as two separate relationships rather than one, where a stock Minelab coil keeps everything under a single manufacturer.

Third, the narrow elliptical shape that helps in trash costs you coverage speed on open ground, the mirror image of the Minelab EQX 15 Coil (15 inch) tradeoff covered elsewhere on this site. Do not run this coil as your only coil if your hunting mixes dense sites with large open fields; keep a general-purpose coil for the latter.

Published owner discussion of Coiltek NOX coils consistently credits the elliptical shape for real separation gains on iron-heavy sites, with several reviews specifically describing recovering targets that a round coil of a similar size had been blending with nearby trash. Build quality and the skid plate also draw consistent positive comment, holding up to regular use on abrasive ground.

The recurring caution in published reviews is the fitment question raised above: owners who run more than one Minelab body report double-checking which specific coil covers which machine before ordering, since Coiltek publishes slightly different compatibility lists for its various coil sizes. Owners also consistently recommend rechecking target ID numbers after any coil change, in line with the general guidance on the Equinox 900 target ID chart.

Buy it if:

• You hunt iron-heavy sites on an Equinox 600, 700, 800 or 900 specifically.
• You want better target separation than a round coil of a similar size provides.
• You are comfortable managing a third-party warranty separate from Minelab.
• You already own a general-purpose coil and are adding this as a second, specialised coil.

Skip it if:

• You own an X-Terra PRO and need confirmed fitment, which this specific coil does not publish.
• Open ground and coverage speed matter more to you than separation. See the EQX 15 review instead.
• You want a single warranty relationship covering the whole machine.
• You own a non-Minelab detector. This coil fits no other brand.