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Fuel tank monitoring system and inventory management for local and remote fuel tanks. In this case study, we talk to 5 Rivers Aviation about their fuel tank monitoring system and how it helps them improve safety and save money on inventory management.

Fuel Tank Monitoring System

Fuel is one of the most critical assets of our modern world, making fuel inventory management one of the more important monitoring and control applications. Our customers trust ControlByWeb fuel level sensors and controllers to manage their critical assets.

Remote Fuel Tank Monitoring System

Monitoring remote fuel tanks is critical for a wide range of industries from Agriculture to Telecommunications. Whether for powering large machinery or as back-up power generation for cell towers, remote fuel tanks need to be carefully managed to keep things moving.

ControlByWeb I/O and data acquisition modules are remote accessible for both remote monitoring and control of pumps, valves, vents, and more. Whether to support custody transfer or simply to regularly log inventory, our modules enable efficient operations at a distance.

Automated Monitoring to Improve Safety

Manual measurements of petrochemicals like oil and fuel come with inherent risks. Tanks are tall structures and the risk of falling is very real. Additionally, fuel and oil tanks are prone to hazardous fumes that are not only bad for the lungs, but combustible. Reducing human intervention will reduce the risk of injury across the board.

Tank Level Monitoring

  X-404 & Power Supply MPX Float Sensor MND Display & Wiring


Supports up to 16 sensors

MND Display

MND Modbus Display


MPX Float Sensor

MPX Float Sensor



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Manual Monitoring & Control

Monitoring systems without remote access and control, or with limited remote access, prevent real time decision-making and quick emergency response.

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Failing Level Sensors

Many types of level sensors struggle with fuel due to its volatility. Whether it's vapor layers, expansion, or corrosion, improper or cheap sensors won't do the job.

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High Cost

Hazardous location approved, industrial-grade monitoring and control systems tend to be expensive, negatively affecting small to medium-sized operations.

ControlByWeb™ Solutions

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Safe & Easy Remote Access

Access and control our devices via any web browser or on our mobile app. Easily and safely check levels, receive email alarms, and automate local control.

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Proven Reliable Sensors

Our float level sensors are designed specifically for and proven in the Oil and Gas field. They are perfect for harsh environments and hazardous locations.

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Affordable Industrial-Grade Solutions

Our rugged sensors and controllers are designed for heavy-duty automation applications common in industrial environments indoor and out.

How ControlByWeb® Works


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Case Study: 5 Rivers Aviation

5 Rivers Aviation provides full-service ground support and onsite services to private aircraft at Livermore Municipal Airport, including supplying fuel with over 48,000 gallons of capacity. Owner Pete Sandhu relies on ControlByWeb sensors and controllers to manage his inventory and aid his fuel purchasing strategy.

Not only is it important for Pete to know how much fuel he has on hand, it's just as important to know how much capacity he has available. Fuel prices fluctuate weekly, and when it's as expensive as aviation gasoline or jet fuel, buying when the price goes down is especially important.

Pete monitors fuel prices closely. When the price comes down, he needs to buy as much as he can. That's where ControlByWeb fuel level sensors and controllers come in handy. He can simply check is phone app and know exactly how many gallons he has available. This lets him optimize his purchasing strategy and run a profitable business.

Pete likes ControlByWeb products so much that he uses them elsewhere as well. When a friend with a 15,000-acre ranch asked him how he could better manage his water, he knew the right solution was ControlByWeb. Just like Pete's fuel level management system, his buddy wanted to know his tank levels and save money. Only this time he wanted to control pumping when his solar panels where producing power.

From managing his own aviation business to helping out trusted friends, Pete uses ControlByWeb level sensors and controllers to perform when it counts.


Six Reasons Why You Should Choose ControlByWeb®

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Industrial-Grade Reliability Is Our First Priority

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Scalable Solutions for any Industrial Application

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Cost Effective, Self-Contained I/O Devices

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Flexible Communications and Compatibility

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Responsive Support and Thorough Documentation

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Founded in 1999 and Manufactured in the USA

Fuel Tank Monitoring Solutions


Suitable for fuel level measurement and hazardous locations. Float sensor works great with all kinds of petrochemicals, including gasoline, diesel, and biofuels.


Frequently Asked Questions


Some of our sensors, like our MPX Float Sensor, is approved for use in hazardous locations with CSA, IECEx, and ATEX certifications. We also carry VEGA radar sensors which feature similar hazloc certifications.


Many of our ControlByWeb devices with analog or Modbus inputs work best for level monitoring. We have developed our X-404 controller specifically for level monitoring applications. The X-404 powers and communicates with the sensors via Modbus RS-485 which allows up to 32 sensors to be daisy-chained together and connected to the X-404 for the easiest installation possible for multiple tanks. The X-404 has a built-in web server with email/text notifications, logging, and an advanced task builder that allows logic to run locally on the device for controlling pumps to help maintain tank levels. Learn More


We recommend the MPX Float sensor, which has been field proven with a variety of fuels and petrochemicals. The floats avoid many of the difficulties of monitoring fuels in a tank, and the rugged construction ensures years of reliable use. Learn More.


While floats getting stuck is a possibility, many different factors prevent this from happening. Some of these factors include the weight of the float, and the space between the float and the stem. We do not recommend using this product to monitor sticky liquids or materials that cause build-up, as these types of applications can lead to float sticking.


The MPX compares very well to an ultrasonic sensor's resolution and accuracy. Its resolution is ±4mm and its accuracy is 0.05% of full scale, making it the most accurate monitoring solution. Ultrasonic sensors are accurate to 0.25% full scale.


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