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How can the filling level of heating oil or rainwater be monitored digitally via an app?

Category: Tank & Liquid Media

For operators of non-pressurised tanks containing liquid operating media such as heating oil, rainwater, lubricating oil, or HVO, precise and convenient monitoring of tank fill levels is now essential. The SmartBox AIR Wi-Fi from GOK offers an innovative solution that combines cutting-edge technology with ease of use.

SmartBox AIR Wi-Fi neben einem Tank um dem Füllstand zu Messen. Der Füllstand wird anschließend per WLAN an das Smartphone übertragen und kann nun überall
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For operators of non-pressurised tanks containing liquid operating media such as heating oil, rainwater, lubricating oil, or HVO, precise and convenient monitoring of tank fill levels is now essential. The SmartBox AIR Wi-Fi from GOK offers an innovative solution that combines cutting-edge technology with ease of use.

What is the SmartBox AIR Wi-Fi?

The SmartBox AIR Wi-Fi is a battery-operated electronic remote filling level indicator specifically designed for non-pressurised tanks containing liquid media. It consists of a digital display unit with a 16-character LCD screen and an integrated pressure pump. To ensure precise measurement of the tank contents, a dedicated measuring hose with a weighted nozzle must be inserted into the tank and connected to the display unit.

Thanks to the device’s integration into the local Wi-Fi network, tank data can be monitored worldwide via the SmartBox app on a smartphone or tablet. The only requirement is that the smartphone or tablet is connected to any network.

Produktbild der SmartBox AIR WiFi – Füllstandsanzeige für z. B. Öltanks mit Datenübertragung per WLAN-Anbindung an das Smartphone.
SmartBox AIR Wi-Fi – Filling level indicator for oil tanks, for example, with data transmission via Wi-Fi connection to a smartphone or tablet PC.

How does the SmartBox AIR Wi-Fi work in detail?

The SmartBox AIR Wi-Fi precisely measures the filling level in the tank using the pneumatic measurement principle. A measuring hose with a weighted nozzle is inserted down to the bottom of the tank. The integrated pressure pump injects air into the measuring hose, which is filled with the operating medium, in short bursts. Once the hose is emptied, the device measures the pressure inside the hose, which corresponds to the current filling level in the tank.

The measured values are immediately displayed on the LCD screen and transmitted via Wi-Fi to the app. Users can customise the measurement intervals to suit their needs, ranging from hourly to monthly. This ensures they always have full control over their tank contents, helping to prevent shortages (e.g., in a heating oil tank) or overfills (e.g., in a rainwater cistern).

Monitor the filling level of the rainwater cistern via app with the SmartBox AIR Wi-Fi!
Monitor the filling level of the rainwater cistern via app with the SmartBox AIR Wi-Fi!

Versatile Applications

The SmartBox AIR Wi-Fi is highly versatile and suitable for various operating media, such as:

  • Waste oil
  • Diesel fuel
  • FAME
  • Heating oil (including bio heating oil)
  • HVO
  • Vegetable oil
  • Rainwater
  • As well as other water-polluting, non-flammable liquids

This broad compatibility makes it the ideal choice for a wide range of applications in private, industrial, and commercial settings.

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App-Based Monitoring

A key feature of the SmartBox AIR Wi-Fi is the ability for operators to conveniently monitor the tank’s filling level via an app. This allows for flexible, location-independent control of tank contents – an especially valuable advantage in today’s digital and mobile world.

The dedicated SmartBox app is free to download and available for both Android and iOS in their respective app stores.

Easy Installation and Operation

The installation of the SmartBox AIR Wi-Fi is straightforward and user-friendly. With the supplied mounting kit, the measuring hose can be quickly and securely inserted into the tank. The display unit itself can be mounted on a wall near the tank. A detailed installation and user manual provides step-by-step instructions, ensuring that even users without specialised knowledge can set up the system with ease.

Once the measuring hose and device are installed, a video tutorial – alongside the user manual – guides users through the commissioning process of the SmartBox AIR Wi-Fi, including how to integrate it into the local Wi-Fi network.

SmartBox AIR Wi-Fi at a Glance:

  • Easy installation via an existing measuring line or a free tank opening.
  • Automatic filling level measurement and transmission to the app can be set to occur hourly, daily, weekly, or monthly.
  • Long battery life: Even with daily measurements, the battery lasts at least one year.
  • Rechargeable via USB-C charging port.
  • Battery status indicator in the app and on the display provides information on the current charge level.
  • Filling level measurement for tank heights up to 4 m for water and 4.5 m for heating oil.
  • Measurement accuracy of ±1%.
  • Simple commissioning with a mobile device—tank installers do not need the app or the user’s Wi-Fi for setup.
  • Manual measurement on-site possible with a simple button press.
  • Monitoring of multiple tanks at different locations, ideal for property management.
  • Multilingual menu navigation: German, English, French, Dutch, Italian, Spanish, and Polish.
  • Data export to Microsoft Excel for further processing.

Conclusion

The GOK SmartBox AIR Wi-Fi sets new standards in tank content monitoring. Thanks to its precise measurement technology, app-based remote monitoring, and user-friendly operation, it provides a modern solution for anyone who wants to keep an eye on their tank’s filling level at all times.

For more information and technical details, visit the official product page: GOK SmartBox AIR Wi-Fi.

By choosing the SmartBox AIR Wi-Fi, you are investing in a reliable and future-proof technology for your tank management.

Author

Editors GOK Blog
The articles are written by specialist authors in the fields of LPG, fuel oil, liquid media, tank management and safety engineering, who contribute their expertise from product management, development, technical customer support, training and standardisation activities. The members of the editorial team have many years of practical experience in the planning, application and further development of technical solutions for the safe supply of LPG and liquid fuels. Several authors are actively involved in specialist committees and working groups of the DVGW, DVFG and figawa, as well as in national and European standardisation committees. The team includes, among others, experts certified in accordance with G 607 and G 608, competent persons in accordance with the TRF, and specialists who contribute to the development and evaluation of technical regulations and industry standards. In addition to providing information about GOK products and solutions, the editorial team focuses on sharing knowledge relating to safety, regulations, maintenance, operation and future technologies in the field of LPG and liquid media.

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FAQ – Monitor fuel level via app

The SmartBox AIR Wi-Fi uses a pneumatic measurement principle: An integrated pump injects air into a measuring tube inside the tank. The resulting pressure corresponds to the current fill level and is shown on the display and in the app.
The SmartBox AIR Wi-Fi is suitable for various non-flammable liquids, including heating oil, rainwater, HVO, vegetable oil, diesel fuel, FAME, waste oil and other environmentally hazardous media.
Connection is established via the local Wi-Fi network. Once integrated, the SmartBox AIR Wi-Fi transmits the data to the free SmartBox app, available for Android and iOS, allowing global monitoring.
Measurement intervals can be flexibly configured – from hourly to monthly. Manual measurements can also be triggered directly on the device by pressing a button.
No, it is user-friendly. Installation is done via an existing measuring line or a free tank opening. A detailed manual and a setup video guide users through the commissioning process.
The measurement accuracy is ± 1%. The device supports tank heights up to 4 metres (water) or 4.5 metres (heating oil).
Yes, the app allows users to monitor several tanks at different locations simultaneously – for example, across multiple properties.
Even with daily measurements, the battery life is at least one year. The battery status is displayed both in the app and on the device.

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This blog will never ask members of the public or unqualified persons to make changes to or fiddle around with technical systems themselves.

In accordance with the Industrial Safety Regulation (BetrSichV), a qualified person must take care of a system which requires monitoring.

A qualified person is someone who has the specific specialist knowledge required. This knowledge is gained by way of a professional apprenticeship, corresponding professional experience or current occupational activity.

Please note that the texts are based on information, regulations and standards for Germany. Please always check the rules and regulations in the relevant country of destination and consult specialists if necessary.