LevelLink

How it works

A stainless probe on the tank floor reads the weight of the water above it. The weatherproof box on top reads the probe, and sends it on to you.

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In the box

What arrives

The probe

A stainless steel pressure sensor on a cable, which lives permanently on the bottom of the tank. Its cable carries a hollow air tube as well as wires, which is why it must be uncoiled rather than left kinked.

The control box

Weatherproof, and designed to stay out in the elements on top of the tank. It sits there or mounts on a pole, with the antenna positioned for the best WiFi signal.

Power

A plug pack and 10 m of low-voltage cable, extendable and safe to bury. The tank end runs at low voltage, not mains.

The app

Free on the App Store. It is how you read the tank, set it up, and receive alerts. A subscription adds the server analysis — see below.

The LevelLink stainless steel pressure probe, showing the sealing O-ring and cable gland
The probe — sealed stainless, O-ring and gland
The LevelLink weatherproof control box with its external antenna
The control box, antenna fitted
The LevelLink app showing the current tank level in metres
The app, showing the current level

Why pressure, not floats or ultrasonics

Water has weight, and the weight above a point on the tank floor is a direct, linear measure of how deep it is. There is nothing to jam, nothing to stick, and no surface to be misread — a rippling surface, a foam layer or a floating leaf all confuse an ultrasonic sensor and none of them trouble a pressure probe.

It also means the only part in the water is a sealed stainless cylinder with no moving parts.

The LevelLink stainless steel pressure probe

Frequently asked questions

What do I need before installing?

Three things: mains power close to the tank, a WiFi network reaching the site of the box, and access to the bottom of the tank through a hole, port or access hatch. Plus an Apple device for now — the Android app is not available yet.

How do I set up the app?

Download it from the Apple App Store, then use the ? help button inside the app for guidance on each part of the setup. The install guide walks through the whole thing including joining the unit to your WiFi.

What are the app's features?

The app is the main way to review your tank. Several features need a subscription, because they depend on the server-side analysis:

Why is there an app subscription?

Primarily cost. The analysis and alerting run on a server continuously — hourly, for every tank — and that carries an ongoing cost in storage, bandwidth and processing that grows with every user added. The aim for the hardware was to keep the purchase price as low as possible, and the subscription is what makes that possible. Everything the device itself does — measuring, displaying, alarming on a fault, reporting to the app — works without a subscription and always will.

Built to be left alone

A sealed stainless probe with no moving parts on the tank floor, and a weatherproof box above it that is designed to sit out in the sun and the rain. Firmware updates are offered rather than forced — the device never installs one behind your back.

See the app in action

The App Store listing carries current screenshots and video of the app running — level, history, usage events and trends. The iPad listing has the most to look at.

Install guide Shop