The N-Series: one platform, four sizes

Every N-Series unit is the same argument at four sizes: put oxygen where the problem forms, and measure the recovery with instruments you can audit. This page says which unit fits your water, what every unit ships with, and exactly how to read the numbers we publish while the first units are still in build.

Which unit fits your water

Four units, one platform. The fit below is the design intent; the assessment confirms sizing against your water's surface area, depth, and condition, and says so in writing if no unit fits.

Every unit measures its own work

The measuring instruments are built into every unit rather than sold alongside it. Each one carries a research-grade optical sensor for dissolved oxygen, the amount of oxygen actually in the water and the single number that decides whether a pond is healthy, measured by a method the EPA recognizes, plus a sensor for water temperature. The N2 and larger units add two more readings, pH for the water's acidity and ORP for how well the water can break down waste. Every reading is tagged with the date its sensor was last calibrated, so the record holds up in front of a board, a regulator, or an inspector, not just on a dashboard.

The unit also meters the oxygen it injects and, at the same time, measures the dissolved oxygen the water actually gained. The two numbers either agree or they don't, and both are in your record. That is delivered performance per installed unit, continuously, which no vendor in this category currently publishes. It's the record we keep, either way the number goes, extended into the machine itself.

Designed for pond water, not lab water

N-Series units run on ambient air: no oxygen bottles, no gas deliveries, no supply contract. Where a water body needs more, an oxygen-concentrator factory option (N2 and up) multiplies output.

Real ponds carry silt, weed fragments, and everything a storm washes in. The injection core has no moving parts in the water path and no fine membranes to clog; the smallest water passage is about 6 mm across, self-clearing by design. The one wear part is a plate that swaps out in under five minutes during a routine visit. What that buys you is the boring kind of machine: it runs, and the service visit is short.

Runs itself, and tells you

Cellular telemetry is included, with no SIM card or data contract on your side. The unit works offline for a month or more and backfills its record when coverage returns. Software updates arrive remotely and roll back automatically if anything is off. You get alerts for low dissolved oxygen, faults, and power loss; setup is done from a phone.

Each unit holds the water to a dissolved-oxygen setpoint: it modulates down or shuts off when the water doesn't need it, which is where the power savings come from, and the larger units throttle in stages. Winterization is a single drain port, and Stewardship handles it anyway.

Safety and compliance

Powered equipment beside water earns scrutiny, and the answers are designed in: an electrical panel built on the UL 508A path, a NEMA 4X (IP66) outdoor enclosure, GFCI protection, and a lockable disconnect. The documentation set for procurement and inspectors comes with the proposal.

How to read every number on these pages

What arrives, and what Stewardship carries

A restoration arrives as three parts, not a truckload of equipment: the shore unit, intake and return lines to placements chosen in the assessment (so oxygen reaches the depth where your problem forms, not just the surface), and the sensor station the whole promise stands on.

The hardware is half the system. Stewardship is the service around it: scheduled visits, sensor calibration, seasonal transitions, and the weekly record of what the water is doing. Your crew takes on nothing, and the record is yours either way, in the format fixed by how we measure.

Where the spec sheet is

The first units are in build now. Each tier page carries its engineering targets today, labeled as targets, so you can plan against real structure instead of emailing for numbers. When units ship, the measured values replace the targets line by line, with the changes logged. If a sizing question matters to your decision before then, ask in the assessment and you'll get the current engineering answers in writing.

Tell us what your water is doing.

A specialist reads your description and replies with a plain answer: what it usually means and what we would measure first.

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