BUYING GUIDE · UK STOCK
Tank Level Monitoring for Fuel, Water & Waste
Dip-sticks and sight glasses tell you the level when someone drives to the tank. Wireless sensors tell you now — and warn you a week before the run-out or the overflow.
Never send a van to read a level again
Tank level monitoring earns its keep in two directions: it stops run-outs (the generator that dies mid-outage, the AdBlue tank that idles a fleet) and it stops overflows (the effluent tank that breaches on a bank holiday). Either failure costs more than instrumenting every tank on the site.
Modern tank level monitoring is a battery sensor bolted to the top of the tank, reading the surface remotely and reporting over LoRaWAN or via a solar gateway from sites with no power at all. Deliveries become scheduled by data — suppliers fill when tanks need filling, not when the route plan says so. (Storing oil? Note the UK oil storage rules on bunds and overfill prevention.)
The tank level monitoring sensors by tank type
Ultrasonic for clean liquids at short range, radar where foam, vapour or condensation defeat ultrasound, submersible hydrostatic for deep water and boreholes. All prices ex VAT, all in UK stock.
Outdoor rugged tanksMilesight EM400-UDL Ultrasonic Distance/Level SensorIP-rated ultrasonic with a self-cleaning-friendly horn design for diesel, water and waste tanks in the yard.
From £194.52 ex VATView →
Larger clean tanksMilesight EM500-UDL Ultrasonic Distance/Level SensorLonger-range ultrasonic for bulk water and fuel storage.
From £202.01 ex VATView →
Foam & vapour tanksMilesight EM410-RDL Radar Distance/Level Sensor60 GHz radar reads through the conditions that blind ultrasound — condensation, vapour, light foam.
From £224.45 ex VATView →
Compact radar, multi-bandMilesight EM411-RDL Radar Distance/Level SensorThe smaller radar unit for tighter mounting spots and awkward tank necks.
From £314.23 ex VATView →
Deep water & boreholesMilesight EM500-SWL Submersible Water Level SensorSubmersible hydrostatic probe for reservoirs, wells and boreholes where top-down sensing cannot reach.
From £251.38 ex VATView →
Waste & wet wellsMilesight EM400-MUD Multifunctional Ultrasonic Distance/Level SensorUltrasonic tuned for the messy end: sumps, wet wells and waste tanks with alarm floats built in.
From £86.79 ex VATView →
Off-grid connectivityMilesight SG50 Ultra Low Power Solar LoRaWAN® GatewaySolar LoRaWAN gateway — brings tank farms and remote compounds online with zero site power.
£683.83 ex VATView →Compare sensing technologies
| Product | Best for | Connectivity | Price (ex VAT) |
|---|---|---|---|
| Milesight EM400-UDL Ultrasonic Distance/Level Sensor | Yard tanks, rugged | LoRaWAN® | From £194.52 |
| Milesight EM500-UDL Ultrasonic Distance/Level Sensor | Bulk clean liquids | LoRaWAN® | From £202.01 |
| Milesight EM410-RDL Radar Distance/Level Sensor | Foam/vapour liquids | LoRaWAN® | From £224.45 |
| Milesight EM411-RDL Radar Distance/Level Sensor | Tight mounting spots | LoRaWAN® | From £314.23 |
| Milesight EM500-SWL Submersible Water Level Sensor | Deep water, boreholes | LoRaWAN® | From £251.38 |
| Milesight EM400-MUD Multifunctional Ultrasonic Distance/Level Sensor | Wet wells, waste | LoRaWAN® | From £86.79 |
| Milesight SG50 Ultra Low Power Solar LoRaWAN® Gateway | No-power sites | LoRaWAN® gateway (solar) | £683.83 |
Ultrasonic, radar or submersible?
Ultrasonic is the default: non-contact, cheap, accurate to a centimetre or two, and happy with diesel, water and most chemicals. It fails where the air above the liquid is not clean — heavy vapour, condensation on the transducer, foam on the surface — and that is exactly where 60 GHz radar earns its premium, punching through what scatters sound.
Submersible hydrostatic probes measure the water column above them, so depth capacity is effectively unlimited — the choice for boreholes, reservoirs and rivers. When you spec tank level monitoring, also check the dead zone (the minimum distance each sensor needs between itself and the maximum liquid level) against your tank’s headroom; it is the spec buyers most often miss.
- Ultrasonic: clean liquids, best value — mind the blanking/dead zone at the top
- Radar: foam, vapour, condensation, dusty solids — condition-proof
- Submersible: deep water, boreholes, open water bodies
- Alert both ways: low-level run-out warnings and high-level overflow alarms
- Battery sensors + solar gateway = fully off-grid tank farms
- Delivery scheduling APIs turn levels into automatic re-orders
Connectivity from tank farms to single tanks
On-site tanks join the site’s LoRaWAN gateway like any other sensor. Remote compounds with no power run everything from the solar SG50 — sensor batteries last years, the gateway feeds itself, and data arrives over cellular backhaul.
Levels stream to dashboards with trend lines and forecast-to-empty, and alert rules cover both run-out and overflow. Pair with water level sensors for open-water and drainage applications, or see the smart inventory solution for bin and silo variants.
Why buy from Indiott
Indiott is the trading name of PSI Technologies Ltd, a UK industrial-communications specialist. Every device on this page is priced in GBP, held in UK stock and dispatched with UK-based support — no grey imports, no marketplace resellers, no guessing which regional frequency band you have been shipped.
Frequently asked questions
How accurate are these level sensors?
Ultrasonic and radar units typically resolve to around ±1 cm, which on most storage tanks is well under 1 % of contents. For stock reconciliation that is ample; for custody transfer you would spec differently. Accuracy holds across temperature because the sensors compensate internally.
What about hazardous or ATEX-zoned tanks?
The sensors on this page are for non-classified areas. If your tank sits in an ATEX zone (petrol, solvents, grain dust), talk to us before buying — zoning changes the specification and we can advise on the right route rather than sell you the wrong box.
Can tank level monitoring trigger automatic re-ordering?
Yes — dashboards expose levels and forecast-to-empty via API and webhooks, so a low-level event can raise a purchase order or email your fuel supplier automatically. Several suppliers will work directly from a shared dashboard view.
What if the tank is miles from power and Wi-Fi?
That is the standard case, not the exception: battery sensors plus the solar SG50 gateway need nothing from the site at all. The gateway backhauls over the mobile network and one unit covers a whole compound of tanks.
Instrument every tank on the site
Send us your tank list — contents, height, location — and we will match sensors to each and price the whole tank level monitoring rollout within one working day.
Next step
Scope it with an engineer.
Tell us the site, the assets and the constraint. You get a bill of materials and a straight answer within one working day.
- A bill of materials sized to your site
- Priced ex VAT, UK entity, no login wall
Rather talk it through? Call 023 9223 3611
Received. An engineer has it.
You will hear back within one working day with the parts, the prices and the lead time. A confirmation is on its way to your inbox.
If it is urgent, call 023 9223 3611.
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