Nokta SIMPLEX Ultra: setup and settings for UK ground

Where the Ultra fits

The Nokta SIMPLEX Ultra is the most adjustable of Nokta's newer SIMPLEX variants. The manufacturer specifies fixed 15 kHz operation, Field, Park, 4 Tone, 99 Tone, Beach and All Metal modes, an 11-inch SX28 coil, automatic/manual ground balance and a fully waterproof body rated to 5 m. It weighs about 1.2 kg. The Ultra's recovery-speed and tone controls are the reason to choose it over the simpler Lite or BT, not a promise that it will identify every deeper coin.

This is a useful inland detector for someone who enjoys learning what audio changes mean. It is not simultaneous multi-frequency. On wet salt sand, Beach mode may produce a more usable response than a general Field profile, but a dedicated multi-frequency machine is worth considering if that is your main terrain. See single vs multi-frequency for the trade-off.

Assemble it without creating a false-signal source

Set the shaft length so the coil stays flat at the end of a comfortable swing. Wind and secure the cable according to the Nokta manual, leaving enough movement at the coil joint. Check the connector alignment and any sealing instructions before wet use. The cable should not slap the lower shaft, but it should not be tensioned when the coil tilts over a rut. Charge the internal battery and confirm the coil and skid plate are intact.

Do your first control practice away from a car, fence, phone and indoor wiring. Put a coin, pull tab and nail on clean ground separately. Pass the coil at a normal search height and listen. This establishes tone differences but cannot predict buried depth or target ID exactly. The air-test guide shows how to keep the exercise useful.

Start with Field or Park, not every advanced menu

On ordinary farmland permission, Field is a straightforward baseline; Park suits a more mixed, littered site. Start with the factory programme, moderate sensitivity and the default discrimination pattern. Use noise or frequency shift if electrical interference is present, and ground balance when ground behaviour warrants it. A stable response makes weak targets easier to interpret than a twitchy maximum sensitivity setting.

The Ultra's 4 Tone and 99 Tone modes can reveal more audio variation, but they also create more information for a new owner to decode. Do not move into 99 Tone because it sounds more advanced. Keep a small notebook: mode, sensitivity, ground, what you heard and what you actually recovered. After a few sessions, audio choices become grounded in evidence rather than expectation.

Use recovery speed on crowded ground

The Ultra offers five recovery-speed steps. Higher recovery can make adjacent targets easier to distinguish, especially a non-ferrous object close to a nail. It can also shorten or weaken a marginal response. On an iron-rich patch, change one step and compare the same marked target at the same sweep speed before committing. When a high chirp appears only on the tip of a long swing, shorten the sweep and turn around it; a numeric ID alone is not proof of a coin.

Tone break, tone frequency and tone volume are also adjustable on the Ultra. A quieter ferrous tone can make an iron-strewn area more tolerable while retaining audible context. Completely suppressing iron may hide clues that a desirable signal is partly masked. Our detecting around iron and recovery-speed guides explain the trade-offs.

Beach use, audio and compatibility

Use Beach mode on conductive sand and reduce sensitivity if the tide line chatters. A waterproof housing permits immersion within the manufacturer's rating, but rinsing, drying and checking the charging-port boundary still matter after salt exposure. Follow the beach cleaning guide before storage. Do not assume that a wet connector can safely be opened or charged.

The Ultra supports Bluetooth audio, but latency and compatibility depend on the headset and detector pairing. The supplied accessories can vary by package, so verify them in the retailer listing. Likewise, choose replacement coils by the exact newer SIMPLEX compatibility list rather than shape or plug alone. A small compatible coil may be more useful than another settings change on tight iron, but it slows coverage on open pasture. Read search coils explained before spending.

Should you buy or keep it?

The Ultra suits a detectorist who mainly searches permission land, wants a waterproof machine, and will genuinely use adjustable recovery and tones. Its limitations are the fixed single frequency and the time needed to learn what extra audio means. If your priority is simpler operation and automatic simultaneous frequency, compare VANQUISH 360 vs SIMPLEX Ultra. If you already own the Ultra, disciplined settings and coil control will usually repay you before an upgrade.