Liquid Level Sensor in RV Level Measurement

TIME: 2025.08.22 NUMBER OF VIEWS 8

Industrial Background

Recent years, as people’s life quality improves, and they pursue personalized and quality travel experience, the necessity of RV market is continuously rising. The market also shows great development potential, and the size continues to expand. The normal operation of RVs is highly dependent on the effective management of various liquids, which makes liquid level measurement a key link in the use of RVs. There are many storage tanks in RVs, including clean water tanks for domestic water, gray water tanks for storing waste water from washing up or wash vegetables, and black water tanks for toilet excrement. It is extremely important for the RV owners to ensure the daily life quality, reasonable travel planning and ensuring stable operation of vehicle systems by accurately mastering the level information of these tanks.

Pain Points of RV Level Measurement

1.Traditional mechanical liquid level meters are easily affected by bumps during driving, resulting in false alarms or mechanical jams.
2.Because of water tank size and high requirements on installation location, the products that fit the tight space should be found.
3.Traditional methods cannot connect with In-vehicle intelligent system, the customers should manually check the water level with poor experience.

4.The media in black and gray water tanks messy and prone to clogging, making it difficult to accurately monitor the liquid level and often leading to unexpected situations.

Product Recommendation

I.According to clean water tanks, use GLTV3 reed switch liquid level sensor

Working principle

Built-in magnet of float rises and falls as the level up and down, triggers reed switch inside the guide rod, outputs the signals of resistance, voltage or 4~20mA.

Core advantages

Anti-vibration design：The floats are made of NBR, bump resistant, and suitable for mobile scenarios.
IP7 protection grade, not afraid of outdoor dust and rain.
Plug and play: Standard flange/threaded interface, suitable for RV standard water tank opening.

II Considering media characteristics of gray and black water tanks, we recommend GLTV7E.

Working principle

Convert location change to capacitance variation, adopts tomography technology, dynamic analysis of various parameters of the sensor in the medium and real-time compensation.

Core advantages

1.Simple structure, high resolution, works reliably, fast dynamic response, can work under harsh conditions such as high temperature, radiation, and strong vibration.
2.The same level sensor can change media or installation environment at any time without the need for re-calibration, and is not affected by changes in dielectric constant.
3.PFA probe rod, anti-corrosion, not affected by product hanging materials at all.

Customer application solution

Customer background

A famous RV manufacturer in North America, the requirement is to provide a real time liquid level monitoring solution for clean water tank, gray water tank, and black water tank for 2024 Class C Motorhome, and ensure the customers that mastering the state of water tanks and preventing overflow or water shortage.

Installation Scenario

Clean water tank（120L）：GLTV3 top vertical installation, range 0-350mm, output 0~190Ω to the car’s central control.

Gray water tank/black water tank（80L）：Top mounted GLTV7E anti-corrosion level gauge, range 0-195mm, output 4-20ma to the car’s central control.

System integration

Sensor signals connect with customer’s self-developed central control system, they can check through 7-inch touch screen or mobile phone APP.
1.Real-time water level percentage
2.Low water level reminder (voice broadcast when <15%)

3.If the black water tank overflows, flushing is strictly prohibited (to avoid embarrassment)

Customer application method

1.The water tank error failure rate is reduced by 90%
2.User surveys show that 92% of car owners believe that "real-time water level display" significantly reduces anxiety.
3.Complaints about black water tank overflows dropped from 3 per month to zero.

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