Monitor a water tank remotely

Put water tank level on a live dashboard, and alert before a tank runs dry, overflows, or drains faster than it should.

A water tank in Logable stores one reading: level, as a percentage of full. This guide covers the six steps from an empty account to an alert on a phone.

1. Add the tank as a device#

Open Devices, select Add Device, and pick the Water tank type. Name it after the asset, such as "Dust Suppression Tank".

The configuration is short:

Capacity, the volume the tank holds when full.
Capacity unit, litres or kilolitres.

Level itself is a percentage, so the tank presets need no threshold of their own.

The Devices page with a water tank added, showing its live level — One tank, added and reporting.

2. Copy the credentials#

Step 4 shows the Device ID and the Device Token, once. Copy both into the gateway's MQTT client, or select Download Credentials.

The Credentials step of the Add Device wizard, showing the Device ID and Device Token fields — Device id and token go straight into the gateway.

3. Send the level#

A water tank sends one metric, level, as a percentage.

{
  "timestamp": "2026-09-12T08:30:00.000Z",
  "status": "online",
  "data": { "level": 62 }
}

Send a reading every minute. A tank moves slowly, and a minute is fast enough for the draining preset to see an hour of change.

An ultrasonic or a submersible pressure sensor gives a distance or a head, not a percentage. Convert it to a percentage of full before the reading reaches Logable, at the sensor's transmitter or in the gateway. That keeps one number on the platform, and every tank preset then reads the same thing.

4. Put it on a dashboard#

Open Dashboards, select Create dashboard, then Create from template, and choose Tank. It lays out the level widget and the history together.

A dashboard created from a template, showing a water tank level widget and its history — Level now, and level over the week.

5. Add the alerts#

Open the tank's Triggers tab and select Browse presets.

Preset	Fires at	What you do
Running low	20 percent full	Refill, or switch the source
Nearly full	90 percent full	Stop the inflow before it overflows
Draining faster than normal	A fall of 15 percent within an hour	Check for a burst line or an open valve
Not reporting	Five minutes of silence, or three times the reporting interval when that is longer	Check the gateway and the power

The preset sheet listing ready made alerts for a device, each with its severity — Ready made alerts for a tank.

If a preset does not fit, select Create Trigger on the same tab instead. Set the metric, the operator, the threshold, and a recovery condition that clears the alert when the reading passes back over it.

The trigger rule form, with a metric, an operator, a threshold, and a recovery condition — A rule built by hand, with its own threshold and recovery condition.

6. Check it arrived#

Open the tank's Connection tab and read the device log. A level sent as a string, a wrong topic or an expired token each show as a row with the reason and the fix.

The Connection tab showing the device log with accepted and rejected messages — Every message, accepted or rejected, with the reason.