Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank

The oil level sensor is very important for monitoring the level of the oil tank/fuel tank. Ultrasonic Oil Level Sensor is mainly used for monitoring the level of truck oil tank. Oil level displays and transmit.

Ultrasonic Oil Level Sensor

Ultrasonic oil level sensor uses the principle of ultrasonic detection to detect the fuel level of the fuel tank. The fuel volume data is transmitted to the background monitoring system to achieve real-time monitoring of vehicle fuel consumption. Ultrasonic oil level sensor is mainly used in the field of Internet of Vehicles to monitor the change of fuel level in the fuel tank in real-time to achieve fuel level detection. It can be used to prevent fuel stealing, optimize operating costs, optimize driver driving behavior, and assist statistical decision-making. At the same time, this product can also be used in chemical, water conservancy, storage tanks, and other fields that require level detection.

Sino-Inst offers a variety of  Ultrasonic level sensors for level measurement. If you have any questions, please contact our sales engineers.

Features of Ultrasonic Oil Level Sensor

  1. Non-contact measurement. No need to change the shape of the container. No need to polish the surface paint of the container. No need to punch.
  2. Easy to install and maintain. Just install the sensor probe below the outside of the fuel tank. No need to change the original fuel tank measurement system. No need to make holes and changes to the fuel tank. And can guarantee the normal operation of the original automobile fuel gauge.
  3. Prevent the fuel level sensor from being corroded and polluted by the fuel, and can maintain long-term measurement stability;
  4. Metal shell, internal circuit potting treatment, rainproof design, no pressure on outdoor environment.
  5. The external waterproof 3M glue is equipped with a special metal fixing bracket, which is simple to install and firmly fixed.
  6. Wide voltage operation, DC 12~48V power supply, suitable for various vehicles.
  7. RS232/RS485/0~5V voltage analog quantity/TTL-UART multiple output interfaces, compatible with various sensor signal acquisition equipment connections.
  8. High frequency ultrasonic detection, high solid penetration, suitable for containers made of various materials such as metal and plastic.
  9. Strong reliability. It can work normally in harsh environments, moisture-proof, acid-proof, flame-retardant, anti-interference, and intelligent.
  10. The product can be used alone, using the auxiliary display to directly view the data. It can also be used in conjunction with a GPS device to transmit data to the background through the GPS device. Perform data statistics, report analysis and query.

Specifications of Ultrasonic Oil Level Sensor

Parameter itemSpecification Description
Operating VoltageDC12~48V
Working current≤25mA
Measuring range5~150cm
Measurement resolution0.1mm
Explosion-proof gradeIntrinsically safe ExiaⅡCT6 Flameproof ExdⅡCT5
Protection levelIP67 dustproof and waterproof
Operating temperature-20℃~80℃
storage temperature-25℃~85℃
Device interfaceRS232/RS485/0~5V analog
Communication interface parametersCommunication rate 9600bit/s
The thickness of the measured container≤20mm


Ⅰ. Normal temperature and humidity. 1 standard atmosphere. The measured liquid is 0# diesel. For testing other liquids, please specify when ordering.

Ⅱ. The sensor can satisfy 2cm thickness container. 5 meters range requirement. Changes in the measurement range must be notified in advance. Default 5cm~1.

Ⅲ. The sensor RS232/RS485 default automatic output mode, compatible with MODBUS controlled and capacitive stick mode.

Extended reading: Guide to Ultrasonic Level Transmitters

Comparison of Ultrasonic Oil Level Sensor with other Oil Level Sensors

  1. Capacitive type: easy to be affected by oil pollution and cause errors. Can not produce electric sparks. Hole installation.
  2. Resistive type: mechanical measurement. Large error, hysteresis, long-term contact with the sensor. It is easy to be corroded and polluted, which affects the measurement accuracy. The fuel tank must be punched during installation.
  3. Flowmeter type: the oil pipe needs to be cut off, and the fuel filling amount cannot be measured. Only the used amount can be measured. It is not convenient for measurement management.
  4. Reed tube type: measurement output accuracy is low. It is greatly affected by the temperature of the measurement medium and the fluctuation of the power supply voltage. The components are easy to be magnetized. The measurement data is greatly affected by the fluctuation of the oil level and the oil pollution, and cannot be installed and manufactured according to the height of the fuel tank.
  5. Float type: can only be used for the fuzzy indication of the liquid level. It cannot be used for the measurement of the liquid level, the degree of fuel contamination of the film resistor, the power supply voltage, the mechanical structure, the lubricity and other product reasons, and the long-term stability of the output value Greater impact.
  6. Ultrasonic: Use non-contact ultrasonic technology to measure. High measurement accuracy, free from corrosion and pollution, explosion-proof, convenient installation, high stability and wide application.

Explore Oil and Gas Flow Meters

How does an oil level sensor work?

Ultrasonic externally attached oil level sensor uses the principle of ultrasonic echo ranging. The sensor is installed outside the bottom of the fuel tank and sends out an ultrasonic signal from the bottom, which is reflected by the oil surface, and then calculates the height of the liquid level according to time and speed.

At the same time, combined with digital signal processing technology, it overcomes the influence of the container wall and realizes high-precision non-contact measurement of the liquid level in the container, which can meet the requirements of industrial applications in terms of application.

Extended reading: Types of Fuel-Diesel Level Sensors

Ultrasonic Oil Level Sensor Application

The ultrasonic fuel level sensor can be used for various vehicles. Such as logistics vehicles, taxis, buses, passenger vehicles, etc.. It is used to digitally record vehicle fueling and fuel consumption. Prevent fuel theft. Avoid waste of resources. Improve operating efficiency, And improve traffic safety. Strengthen the level of operation and management.

  1. Prevent oil theft: The system can easily read the actual oil volume through the oil volume display screen or the background monitoring terminal. It can effectively control the behavior of stealing oil and falsely issuing fuel bills.
  2. Optimizing operating costs: Through the collection and analysis of statistical monitoring data, the oil volume and mileage at any time can be counted, and the oil volume per kilometer and the fuel cost per kilometer can be calculated. This allows the managers to analyze the economic and fast transportation routes.
  3. Optimize driver’s driving behavior: Real-time monitoring of fuel quantity data can effectively improve the driver’s driving habits and reduce normal fuel consumption.
  4. Strengthen operation management: effective oil quantity data analysis and statistics. Provide scientific decision-making basis for enterprises. Change unreasonable quota oil quantity management indicators based on experience and intuition. Through the statistical analysis of oil quantity, the unreasonable quota oil quantity index can be quickly reduced to a reasonable level. It can save the enterprise’s high oil quantity quota expenditure.

Extended reading: Oil Level Measurement Solutions for the Oil & Gas Industry


Extended reading: Diesel fuel tank level gauges & indicators

Ultrasonic Oil Level Sensor Installation Steps

Step 1. Choose the installation location

① When selecting the installation area at the bottom of the fuel tank, try to avoid the oil outlet pipes at both ends of the fuel tank and the barrier position near the oil inlet, and try to choose the ideal installation area at the middle position.

②Clean up the dirt at the installation location with a rag at the selected location. Please do not polish the paint layer at the bottom of the fuel tank before confirming the installation point, so as to avoid the wrong location and waste installation man-hours.

Step 2. Test and confirm the installation point

①Spread the prepared clean water on the sensing area of the probe, and add as much water as possible to ensure that the air on the contact surface between the sensor and the fuel tank is removed, and then the sensor is fixed to the fuel tank to select the installation position.

②Connect the waterproof head of the display board and the waterproof head of the oil level sensor, insert the USB plug of the display board into the pre-prepared mobile power supply, and observe whether the data on the display board is stable to determine whether the selected point is correct.

Step 3. Fix the ultrasonic oil level sensor

① Polish the selected installation point with sandpaper to remove the paint layer to ensure that the installation surface is flat, and clean it again with a rag to ensure that no dirt enters the sensor before installation.

②Use a glue gun to hit the glue into the sensor’s sensing area, and use a toothpick to mix the glue evenly, and then fit it to the fuel tank installation position. The glue will initially solidify in 4-5 minutes at room temperature, and then prepare the wiring.

Ultrasonic Tank Level Sensor-External Mounted

The ultrasonic tank level sensor is a completely non-contact/non-invasive measurement. The principle of ultrasonic (sonar) is used to measure liquid level. Fuel tank level monitoring, display, alarm, etc.

ultrasonic tank level sensor

Ultrasonic tank level sensor is also often referred to as “ultrasonic water level sensor”, “ultrasonic level detector” or “ultrasonic level transmitter”, etc.

Ultrasonic tank level sensor uses ultrasonic pulse echo to achieve liquid level measurement. Specifically, the transducer (probe) of the ultrasonic tank level sensor emits high-frequency ultrasonic pulses. When it encounters the surface of the liquid level to be measured, the sound waves are reflected Back. Part of the reflected echo is received by a transducer (probe) and converted into an electrical signal.

The user can almost truly know the time of the water level based on the reflected signal. The ultrasonic tank level sensor is one of the most common non-contact liquid level measurement instruments in the industry.

Ultrasonic tank level sensor can be widely used in various atmospheric storage tanks, process tanks, small tanks and small containers, pump lifting stations, waste water storage tanks, etc.;

Due to the flexibility of its design, ultrasonic level gauges can also be used in integrated systems or in place of float switches, conductivity switches and static pressure sensors. It can also be found in integrated applications in fluid control and chemical supply systems.

Extended reading: Capacitance level sensor advantages and disadvantages

Related Products


Ultrasonic liquid level sensor is a digital liquid level meter controlled by microprocessor.

In the measurement, ultrasonic pulses are emitted by a sensor (transducer). The sound wave is reflected by the liquid surface and received by the same sensor. It is converted into an electrical signal by a piezoelectric crystal. Measure the distance to the surface of the liquid.

Due to the non-contact measurement, the measured medium is almost unlimited, and it can be widely used in the measurement of the height of various liquid materials.

In fact, there are many types of oil level sensors. Different types of oil level sensors work differently.

For example, the External PasteUltrasonic Oil Level Sensor mentioned in this article is based on ultrasonic measurement.

There is also a common capacitive oil level sensor. The sensing part of the capacitive oil level sensor is a coaxial container. When the oil enters the container, it causes a change in the capacitance between the sensor housing and the sensing electrode. This variation is converted through the circuit and performs accurate linear and temperature compensation, and outputs a 4-20mA standard signal for the display instrument.

For other types of oil level sensors, please refer to:

Oil Level Measurement Solutions for the Oil & Gas Industry

Of course. The oil level sensor is very important. Whether it is for automobiles or industrial tanks.

Accurate measurement and monitoring of oil level can effectively save production costs and ensure production efficiency.

Read More:

Magnetostrictive Level Gauge Application: Refined Oil Storage Tank

The working principle of the ultrasonic liquid level sensor is:

Ultrasonic transducer (probe) emits high-frequency pulse sound waves, and the surface of the measured level (material) is reflected back. The reflected echo is received by the transducer and converted into an electrical signal. The propagation time of the sound wave is proportional to the distance from the sound wave to the surface of the object.

The relationship between the sound wave transmission distance S and the sound speed C and the sound transmission time T can be expressed by the formula: S=C×T/2.

Image Source: https://www.coulton.com/beginners_guide_to_ultrasonic_level_transmitters.html

The probe part emits ultrasonic waves, which are then reflected by the liquid surface. The probe part is received again. The distance from the probe to the liquid (object) surface is proportional to the elapsed time of the ultrasonic wave:
hb = CT2
Distance [m] = time × speed of sound/2 [m]
The temperature compensation formula of sound velocity:
Ambient sound velocity = 331.5 + 0.6 × temperature

Read more about: How to Choose Explosion Proof Ultrasonic Level Sensor?

Currently, most ultrasonic level sensors on the market have an accuracy of ± 0.5% (standard conditions).

It can already meet the needs of most users.

Different types of oil tank level sensors work based on different measurement principles. Oil tank level sensors measure tank oil level either directly or indirectly.

For detailed classification and working principle of oil tank level sensors, please refer to:

Classification of Oil Level Measurement

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Sino-Inst offers over 10 Ultrasonic Tank Level Sensors for level measurement. About 50% of these are fuel level meters, 40% is the tank level sensor.

A wide variety of Ultrasonic Tank Level Sensor for level measurement options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Ultrasonic Tank Level measurement instrumentation, located in China.

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Ultrasonic Oil Level Sensor for Truck Fuel Tank|External Paste

The oil level sensor is very important for monitoring the level of the oil tank/fuel tank. Ultrasonic Oil Level Sensor is mainly used for monitoring the level of truck oil tank. Oil level displays and transmit.

Product SKU: FT-OL

Product Brand: Sino-Inst

Product Currency: usd

Product Price: 95.00

Price Valid Until: 2039-09-30

Product In-Stock: InStock

Editor's Rating:
This entry was posted in Ultrasonic Level, Level Transmitters by KimGuo11. Bookmark the permalink.

About KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects. Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.