Know what's in every tank — without sending anyone to look.
Crake puts a small wireless sensor on each water, waste or fuel tank and shows the level on your phone, every hour, for every site. You get an email before a tank runs dry or overflows — so no wasted tanker trips, no welfare unit without water, and no surprises.
Battery powered · no site Wi-Fi or mains needed · rented monthly
Stop guessing tank levels
On remote and temporary sites, someone usually has to go and look — or a tanker turns up on a fixed schedule whether it's needed or not. Crake replaces that with a number you can trust.
Fewer wasted trips
Empty or refill tanks when they need it, not on a guess. Every visit to a half-full tank is money spent for nothing.
Never run dry
A welfare unit without water can stop work on site. Crake warns you days ahead, with time to arrange a delivery.
Proof, not paperwork
Every reading is time-stamped and kept, so you can see what happened, when — and show it to whoever needs to know.
No more site visits to check
Levels from every site on one screen. Nobody has to climb up and dip a tank to find out what's in it.
How it works
Simple hardware, designed for sites with no power and no internet.
A sensor on each tank
A battery-powered ultrasonic sensor sits in the tank hatch and measures the distance down to the liquid — no contact with water, waste or fuel.
Radio to a gateway
Each hour the sensor sends its reading by long-range, low-power radio to one gateway on site, which can serve several tanks.
4G to the dashboard
The gateway sends the readings over the mobile network. If the signal drops, it keeps them and sends them later — nothing is lost.
Levels and alerts
See every tank as a percentage and in litres, with alarm emails when a level needs action — and an email when it's back to normal.
Everything you need to see, in one place
Works on any phone or computer. Nothing to install.
Live levels
Percentage and litres for every tank, updated hourly, with a 7-day history chart.
Alarm emails
Low, high and "no data" alerts to the people you choose. Each level is confirmed by two readings, so one splash doesn't set it off.
"Empty in 3 days"
Crake works out how fast each tank is being used or filled and tells you when it will need attention.
Every site on a map
One map of the UK showing every site, coloured by status, with a list of what needs doing first.
Accounts for your whole company
Head office sees every site, regional managers see their region, site teams see their site.
Quick, simple install
A step-by-step installer page on a phone: type the sticker code, answer a few questions, done.
Built for rail, construction and infrastructure
Anywhere there's a tank that someone has to keep an eye on.
Welfare units and site cabins
Fresh water tanks that must never run out. Get a warning in time to book a refill.
Toilet and waste tanks
Know when a tank is nearly full and book emptying only when it's needed.
Generators and bowsers
Keep generators running and see diesel use across every site.
Coming soon
Temperature sensors Soon
Frost risk for pipes and tanks, and temperatures in cabins and equipment rooms.
More sensor types Soon
Further sensors on the same gateway and dashboard — tell us what you'd like to monitor.
Theft alerts Soon
An alert when a fuel level drops suddenly, out of hours.
Collection planning Soon
See which tanks are due and plan the quickest route to empty or refill them.
Rent it, don't buy it
A simple monthly rental per site gateway and per tank sensor — no large up-front cost, and easy to add or move sensors as your sites change.
- Hardware, dashboard and alarm emails included
- Move sensors between sites without new hardware
- Add as many people to your account as you like
- Support from the people who design and build it
Try it on one site first
Start with a single site and see the difference before rolling out further. Get in touch and we'll talk you through what you need.
Get in touch
Tell us about your sites and tanks and we'll come back to you.