Tank Level Monitoring: A Complete Guide

Key takeaways

• A tank level monitoring system has four parts: a level sensor, a gateway or integrated monitor, a network (cellular or satellite), and a cloud platform with alerts.
• The right sensor depends on what is in the tank: pressure sensors for compatible liquids, radar or ultrasonic for corrosive or hazardous products, magnetostrictive floats for high-accuracy inventory, and float-gauge readers for propane.
• Cost comes down to hardware per tank, connectivity, installation, and the software platform — not just the price of the sensor.
• One tank per location usually calls for one of our stationary tank monitors; sites with many tanks or mixed assets usually call for sensors plus a gateway.
• Look for hazardous-location ratings, satellite fallback, configurable alerts, and API or Modbus integration before you buy.

What is tank level monitoring?

Tank level monitoring is the practice of measuring how much liquid or gas is in a storage tank and reporting that reading to the people who need to act on it.

For decades, that meant someone driving to the tank, opening a hatch or reading a dial, and writing the number down. Remote tank level monitoring replaces that trip with a sensor that takes the reading and a network connection that sends it to a dashboard. The data is only as old as the last scheduled reading, not the last site visit.

Operators use it to answer three questions without leaving the office: How much do I have? When will I run out (or overflow)? Is anything wrong? The answers drive delivery scheduling, inventory accounting, spill prevention, and compliance reporting. Fewer manual checks also means fewer truck rolls, which is often where the first savings show up.

How does a tank level monitoring system work?

A tank level monitoring system works by passing a reading from a sensor, through a gateway and a wireless network, to a cloud platform that displays it and sends alerts.

1. Sensor. A level sensor measures the tank. It may sit inside the liquid (pressure or float), mount on top and measure the distance to the surface (radar or ultrasonic), or read an existing float gauge on a propane tank.
2. Gateway or monitor. The sensor connects to a gateway that collects the reading and handles communication. In a stationary tank monitor, the sensor and gateway come together as one pre-integrated unit.
3. Network. The gateway sends readings over cellular (LTE-M or NB-IoT) or satellite. Remote sites without reliable cell service use satellite as the primary link or as an automatic fallback. See cellular vs satellite for how to choose.
4. Platform, dashboard, and alerts. A cloud platform stores every reading, plots tanks on a map, shows trends, and sends alerts by SMS, email, or mobile app when a level crosses a threshold or changes faster than expected.

Most systems report on a schedule, such as a few times a day, to save battery and data. Some devices, like the XSync R, also send threshold and rate-of-change alarms in an immediate burst instead of waiting for the next scheduled report, and support on-demand requests for a near-live reading.

What types of tank level sensors are there?

The main tank level sensor types are submersible pressure, non-contact radar, ultrasonic, magnetostrictive float, float-gauge readers, and wireless sensor nodes.

Submersible (hydrostatic pressure) sensors sit at the bottom of the tank and measure the pressure of the liquid column above them, which converts to level. They are simple and cost-effective, but the sensor must be rated for the liquid — a sensor built for water is not automatically safe in fuel or acid.

Non-contact radar sensors mount on top of the tank and time a radar signal reflected off the surface. Because they never touch the product, they suit corrosive, viscous, or hazardous liquids, and radar is less affected than ultrasonic by vapor and temperature changes.

Ultrasonic sensors work the same way but use sound. They are a lower-cost non-contact option for water and clean liquids in open or vented tanks, but vapor, foam, and temperature swings can affect them. Our guide to radar vs ultrasonic by application covers where each one fits.

Magnetostrictive float sensors use a float that rides on a rigid probe. They offer very high accuracy, which is why they are common in fuel and chemical storage where inventory reconciliation matters.

Float-gauge readers attach to the existing float gauge on a propane tank and report its reading, so the tank does not need to be opened or modified. See our guide to propane tank monitoring for more.

Wireless sensor nodes — radar, pressure, laser, or flow — are battery-powered and report over a low-power wireless link to a nearby gateway, removing conduit and cable runs between the tank and the gateway.

Sensor type	How it measures	Touches product?	Best for	Watch out for
Submersible pressure	Pressure of the liquid column	Yes	Water, fuel, and chemicals it is rated for	Material compatibility, sludge buildup
Non-contact radar	Radar reflection off the surface	No	Corrosive, viscous, or hazardous liquids	Higher cost than ultrasonic
Ultrasonic	Sound reflection off the surface	No	Water and clean liquids in vented tanks	Vapor, foam, and temperature swings
Magnetostrictive float	Float position on a probe	Yes	Fuel and chemical inventory	Needs a tank opening for the probe
Float-gauge reader	Reads the tank's existing dial	No	Propane tanks	Limited to the gauge's resolution
Wireless sensor node	Radar, pressure, laser, or flow	Depends on type	Sites where wiring is impractical	Must be in range of a gateway

LevelCon's sensors cover each of these technologies, with wetted materials selected per application.

How much does tank level monitoring cost?

The cost of tank level monitoring depends on four drivers: hardware per tank, connectivity, installation, and the software platform.

• Hardware per tank. A non-contact radar sensor, a hazardous-location rating, or a high-accuracy float raises hardware cost compared with a basic pressure sensor. Sharing one gateway across several tanks can lower the cost per tank.
• Connectivity. Cellular plans are the low-cost default. Satellite costs more but may be the only option at remote sites. How often the device reports also affects data use and battery life.
• Installation. Pre-integrated monitors and wireless sensors cut labor because there is no conduit or wiring to run. Wired systems in classified areas take more time and may need a licensed electrician.
• Platform. The cloud dashboard, alerts, mobile apps, and integrations are usually a recurring fee.

The fairest way to compare is total cost against what monitoring replaces: manual gauging trips, emergency deliveries, run-outs, and overfills. Start with the sites where manual checks cost the most, prove the savings, then expand.

Which industries use tank level monitoring?

Tank level monitoring is used anywhere stored liquid or gas is expensive to run out of, risky to overfill, or hard to reach.

• Oil & gas: produced water, crude, and chemical tanks at wellheads and tank batteries, where hazardous-location ratings are required.
• Agriculture: fuel, propane, fertilizer, and livestock water tanks spread across large properties.
• Water & wastewater: storage tanks, lift stations, and reservoirs that must not run dry or overflow.
• Chemical: corrosive and hazardous storage where non-contact sensing and accurate inventory matter.
• Mining: fuel, water, and reagent tanks at remote sites that often lack cellular coverage.
• Transportation: fuel and fluid storage at depots and yards that support fleet operations.
• Utilities & energy: backup generator fuel and other tanks at substations and critical sites.

How do you choose a tank level monitoring system?

Choose a tank level monitoring system by matching the sensor to your product, the network to your site, and the platform to your workflow.

1. Product compatibility. Is the sensor rated for your liquid or gas — fuel, propane, chemical, or water?
2. Hazardous-location rating. Do you need a Class I, Division 1 device? The F200 gateway is certified for Class I, Division 1, Group D locations, and the XSync R is rated CID1 (certification applied for).
3. Coverage and fallback. Is cellular reliable at every site? If not, choose gateways with satellite as a primary or automatic fallback link.
4. Power. Is mains power available, or do you need long battery life or solar? The F200 delivers 5+ years between service visits at two reports per day.
5. Alerts. Can you set low-level, high-level, and rate-of-change thresholds and route them by SMS, email, or app to the right people?
6. Integration. Does the platform offer a REST API or Modbus to feed SCADA, ERP, or BI tools?
7. Installation effort. How much wiring, conduit, and field configuration does each tank need?
8. Scale. Can one dashboard handle every tank, site, and asset type you plan to add later?

Stationary tank monitor vs sensor + gateway: which do you need?

Choose a stationary tank monitor for one tank per location, and a sensor-plus-gateway setup when one site has several tanks or other assets to monitor.

Stationary tank monitors combine the level sensor and gateway in one enclosure. They ship pre-integrated and pre-configured, so installation comes down to a single mounting step. They are a strong fit for fuel, propane, chemical, and water tanks that stand alone — a farm propane tank, a generator fuel tank, or a remote water tank.

A sensor-plus-gateway setup separates the two. One gateway can read several sensors — level, pressure, flow, or temperature — and send them all through one connection. The F200 accepts RS-485, RS-232, 4–20 mA, 0–5 V, and pulse inputs, so it works with a wide range of existing sensors. This approach suits tank batteries, chemical storage yards, and sites where level is one of several things you need to watch.

Many operators use both: stationary monitors for scattered single tanks and gateways for busy sites, all reporting into the same LevelCon platform.

Why LevelCon for tank level monitoring?

LevelCon has built industrial monitoring systems for more than 40 years and today supports over 150 customers and more than 50,000 monitored assets. Gateways, sensors, and stationary tank monitors all report into one cloud dashboard with live maps, historical trends, alerts, native iOS and Android apps, and REST API and Modbus access. If you are scoping a project, contact us and a LevelCon engineer will help match hardware to your tanks.

Frequently Asked Questions

What is tank level monitoring? Tank level monitoring measures how much liquid or gas is in a tank and sends that reading to the people who need to act on it. A sensor takes the reading, a gateway sends it over a cellular or satellite network, and a cloud platform turns it into dashboards, trends, and alerts.

How does a tank level monitoring system work? A level sensor measures the tank, a gateway or integrated monitor collects the reading, the reading travels over a cellular or satellite network to a cloud platform, and the platform shows levels on a dashboard and sends alerts by SMS, email, or app when a threshold is crossed.

Which sensor type is best for tank level monitoring? It depends on the product and the tank. Submersible pressure sensors suit compatible liquids at low cost, non-contact radar and ultrasonic sensors suit corrosive, viscous, or hazardous products, magnetostrictive floats suit high-accuracy fuel and chemical inventory, and float-gauge readers suit propane tanks with an existing dial.

How much does tank level monitoring cost? Cost depends on four drivers: the hardware needed per tank, the connectivity plan (cellular or satellite), installation effort, and the software platform. Ask for a quote based on your tank count, products stored, and site coverage rather than comparing list prices alone.

Does tank level monitoring work without cell coverage? Yes, if the system supports satellite. Cellular (LTE-M or NB-IoT) is the usual primary link, and sites without reliable coverage use a satellite-connected gateway as the primary link or as an automatic fallback.

How often does a tank level monitor report? Most monitors report at scheduled intervals, such as a few times a day, which is enough to plan deliveries and catch low levels early. Alarm conditions like a high level or a sudden drop can be sent right away instead of waiting for the next scheduled reading on systems that support it.

Do I need a stationary tank monitor or a sensor and gateway? Use a stationary tank monitor when you have one tank per location and want the simplest install. Use separate sensors and a gateway when one site has several tanks or other assets, such as pressure or flow, that should report through one device.

Can tank level data connect to SCADA or ERP systems? Yes. The LevelCon platform offers a REST API and Modbus connectivity, so tank level readings and alerts can flow into SCADA, ERP, and business intelligence tools you already use.