Digital Measurement Solutions - Electronic Gauge for Liquefied gases

It is essential to know how much gas remains in a tank or cylinder to ensure reliable gas supply management. Whether it is residential propane tanks, industrial cylinders or cryogenic storage systems, users need a clear indication of the remaining gas level in order to anticipate refills and avoid unexpected interruptions. Traditionally, gas tanks are equipped with mechanical level gauges, usually based on float mechanisms connected to a pressure gauge. These gauges provide a quick visual indication of the tank level, often expressed as a percentage of capacity. Although simple and widely used, mechanical gauges typically provide only a rough indication of remaining content, usually within a wide range rather than an exact measurement.

Over time, mechanical systems can also become difficult to read or unreliable. Float mechanisms can become stuck, indicators can become less accurate, and the dial usually needs to be checked directly on the tank itself. In many installations, particularly where tanks are located outdoors or in areas that are difficult to access, regular visual inspection is not always practical. As a result, users often operate with limited visibility of the actual gas level, increasing the risk of unexpected gas failure or urgent refilling.

To overcome these limitations, modern gas installations are increasingly relying on digital level measurement technologies. These systems replace traditional mechanical gauges with electronic sensing solutions that can provide clearer, more accurate and more accessible information about the gas remaining in the tank.

Introducing Electronic Gas Level Monitoring

Unlike conventional mechanical gas gauges, digital gauges measure the remaining gas level via an electronic sensor integrated into the gauge. This sensor continuously monitors the tank contents and converts the signal into a clear digital reading, providing improved precision and enhanced measurement accuracy compared to traditional mechanical gauge systems.

Thanks to electronic signal processing, digital level gauges can provide more stable and reliable data, even in difficult conditions such as pressurised propane tanks or cryogenic storage tanks. In addition to providing an accurate and precise view of the remaining gas level, Rotarex measurement systems offer the option of configuring a level alarm that alerts when the level reaches a certain threshold.

By combining precision, accuracy and alarm functionality, electronic level gauges transform gas monitoring from a simple visual check to a proactive and intelligent management tool.

One Solution for Multiple Gas Applications

Our digital measurement solution is suitable for a wide range of applications, including liquefied gases such as propane and butane, refined fuels, and cryogenic gases. Designed to operate reliably in pressurized cylinders and low-temperature storage tanks, it provides continuous and accurate level monitoring in residential, commercial, industrial and medical sectors.

For LPG installations, the system helps prevent unexpected empty tanks and facilitates efficient refill planning. In cryogenic applications such as LNG, LH₂, LHe and LAr, it offers stable performance even in extreme temperature conditions.

In the food and beverage industry, accurate monitoring of CO₂ and LN₂ ensures continuity of production, while in medical environments, reliable measurement of LO₂, LN₂O and LHe levels ensures safe and uninterrupted patient care.

From small cylinders to large bulk storage tanks, this solution provides a unified digital platform for efficient and secure liquefied gas management.

Why Gas Tank Level Monitoring Matters?

It is important to know the remaining level in gas tanks to ensure safety, comfort and operational continuity, whether in industrial facilities or at home. An unexpectedly empty tank can lead to heating failures, problems in the kitchen or cold showers at home. In the industrial sector, an interruption in the gas supply can lead to production stoppages or critical supply disruptions. Regular monitoring of fuel levels is therefore a key part of effective gas management. By knowing exactly how much gas is left in the tank, you can avoid urgent refill requests or last-minute cylinder changes. The ability to accurately read gas levels ensures better planning and greater peace of mind.

In residential environments, users expect to be able to easily read the remaining gas level without complex procedures. A clear, easy-to-read indicator allows homeowners to quickly check their propane tank level and plan refills in advance. In industrial or commercial environments, more advanced monitoring systems provide accurate data, allowing operators to accurately read gas consumption trends and optimise supply logistics.

Modern level measurement solutions are also designed to be easy to install on existing tanks, making upgrades simple without major modifications. From simple propane tank level checks to continuous fuel level monitoring with an integrated fuel level sensor, reliable gas level monitoring enables safer operations, better cost control, and smarter overall gas management.

Digital Monitoring For All Liquefied Gas Applications

Digital monitoring solutions include advanced sensing technology designed to support a wide range of liquefied gas applications. From LPG and refined fuels used in domestic and industrial environments to cryogenic gases such as LNG, LH₂, LHe, and LAr, accurate fuel tank level measurement is essential for safe and efficient operations.

In the food and beverage industry, reliable monitoring fuel levels of CO₂ and LN₂ ensures consistent production quality, while in medical applications such as LO₂, LN₂O, and LHe, precise fuel tank level control and stable gas flow are critical to guarantee quality care.

By combining advanced technology with continuous monitoring fuel performance, digital systems provide better visibility of tank contents, improved gas flow management, and enhanced operational reliability across all liquefied gas sectors.

Precise and Reliable Level Measurement

Rotarex digital measurement solutions deliver an exact reading of the gas level inside the cylinder, eliminating guesswork and placing the focus on true measurement accuracy. By providing stable and reliable data instead of approximate visual estimates, users can confidently manage their gas supply. Real-time monitoring enables optimized replenishment planning, reduces emergency refills, and supports smarter operational decisions. Explore the benefits that make digital monitoring the smarter choice.

Flexible remote monitoring

Rotarex solutions offer flexible remote reading options to suit different applications. A single valve can be connected via cable for simple installations, while up to eight valves can connect wirelessly via Bluetooth for local monitoring. For larger operations, an unlimited number of valves can be linked to a digital device or directly to the cloud via NB-IoT, enabling centralized fleet visibility and full asset control. The system scales easily from small installations to complex industrial networks.

Robust Technology with No Moving Parts

The system works by directly measuring the capacitance of the sensor and the dielectric properties of the product between two stainless steel probes. This enables continuous and stable level detection without mechanical components. As a direct replacement for traditional float gauges, the absence of moving parts significantly improves reliability, reduces wear and tear, and increases long-term durability.

Superior accuracy in all conditions

With ±1% accuracy across the entire range, Rotarex digital gauges outperform mechanical and pressure-based devices. Unlike pressure measurement systems, which can vary depending on temperature or vapour conditions, capacitive sensing reflects the actual liquid level. An integrated thermal barrier protects electronic components from extreme cold, ensuring stable performance even in cryogenic environments.

Increased operational efficiency

The system is designed for durability and reliable operation during transport and daily handling. Improved fleet visibility and enhanced supply chain coordination enable better inventory control and optimized delivery planning. More accurate and continuous measurements lead to increased productivity, reduced downtime, and improved customer service.

Seamless integration and broad compatibility

Digital solutions are designed to integrate easily with existing business management systems, ERP platforms and cloud dashboards. Configurable alarms and anomaly detection improve safety by warning of unexpected pressure drops or irregular conditions. This technology is available for all types of cylinders and tanks, from small portable cylinders to large storage tanks of 6 metres and above, providing a unified digital platform for a wide range of liquefied gas applications.

Discover the Rotarex Connect Mobile App for Smart Gas Monitoring

Discover Rotarex Connect, the mobile app that lets you track your gas consumption in real time, wherever you are. With the interactive dashboard, users can monitor their gas levels and consumption trends, and set up level alarms to better manage refills.

By transforming measurement data into clear, actionable information, Rotarex Connect improves safety, operational efficiency and overall gas management performance. Contact us to learn more about how Rotarex Connect can support your digital monitoring strategy.

Mechanical vs Electronic – Clear Comparison

Feature	Mechanical Gauge	Electronic Gauge
Accuracy	Moderate	High
Remote monitoring	❌ No	✅ Yes
Data logging	❌ No	✅ Yes
Alerts	❌ No	✅ Yes
Installation	Simple	Simple to advanced
Future-ready	Limited	Scalable & connected