DF521 advanced ultrasonic transducer best OEM ODM oil diesel fuel tank level sensor water level transmitter

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$110.00 - $130.00 / Units | 10 Unit/Units (Min. Order)
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Quick Details
Place of Origin:
Beijing, China (Mainland)
Brand Name:
Model Number:
F521 Ultrasonic Level Sensor
Level Sensor
Ultrasonic Sensor
Digital Sensor
Sensor Type:
Ultrasonic Fuel / Water Level Sensor
Power Supply:
9~36V DC
Output Signal:
0~5V DC, RS232, RS485
Explosion Proof:
Exia II CT6
Working Temperature:
-20~70 ℃
Glue fixing no need drill hole
LED display:
optional for installation
Supply Ability
Supply Ability:
1000 Unit/Units per Week
Packaging & Delivery
Packaging Details
Water level sensor Packed by strong cartons and foam fillings.We provide strong,protective carton box for this item to keep it from outer damaging. For more information,please refer to the pictures attached below.
Product Description
Attention: The characteristic of F521 ultrasonic level sensor is no drill hole on the fuel tank, which use glue fixing on the tank bottom. And the measure range is 50mm~2000mm. Have 0-5v&RS232 and 0-5v&RS485 output for your selection.



DF500, DF520 and DF521 are different versions of the same product Ultrasonic Level Sensor. The major differences among these three versions is the height and  thickness of test container. DF521 is the most powertful one,it is suitable for 5m high and 10mm thick container.

The DF521 is 3 in1 product, which include the function of ultrasonic level sensor, GSM/GPRS (optional for WCDMA), and GPS module.  So it can work as gps tracker and fuel level sensor at the same time.

Regarding the function of level sensor, it is one type of ultrasonic level sensor which measure the liquid level without drilling hole on container. The resolution is 1mm or 0.1%FS (the bigger value). Measurement range from 0-2 meters.This model is the updated version for our product DF520. It is applicable for the close container or open container which thickness is less than 3mm. Steel tank, Aluminium alloy tank or plastic are applicable.

As it is integrated with GPRS+GPS (WCDMA+GPS for 3G version), so it can upload data to gps tracking system server. It is support to upload data to third party IOT platform, such as Freeboard™ or Thingspeak™.  

It is applicable for automotive, oil station, chemical storage and other industrial to realize realtime monitoring of storage, online inventory management, statistics and estimation of production.

It is open for customized design (OEM/ODM) on hardware or software.




System Diagram

DF521 advanced ultrasonic transducer best OEM ODM oil diesel fuel tank level sensor water level transmitter


Interface Definition

Interface Definition

Notes: If there is labels on sensor for pin definition, please act as the labels.

Part List

DF521 advanced ultrasonic transducer best OEM ODM oil diesel fuel tank level sensor water level transmitter



*: The couplant and glue is forbidden to delivery for airplane shipping or express shipping. So we do not offer them in the standard package.  

Please purchase at local market. The couplant (vaseline) is easy to find at medical store.

It is applicable only if the glue can work for your container and the transducer.


The LED Display tool is helpful to find the good installation point during installation. It is not included in standard package. One led tool is enough for multiple DF520 installation.  

Model Naming Rules










Packaging & Shipping

Deliver by DHL/UPS/FedEx/EMS optional

DF521 advanced ultrasonic transducer best OEM ODM oil diesel fuel tank level sensor water level transmitter


Our Services

Our service

If you have any question about our products , please contace me. I will help you familiar with our products better.


  • Support 1 years warranty
  • The fastest reply: detailed informations, specific model and price of products will be provided quickly after receiving your inquiry.
  • Quality assurance: good quality is assured by advanced manufacturing technology. And all products will be checked by our quality-control manager.
  • Excellent package: each unit has individual box and all boxes are packed in standard packages.
  • OEM available.
Company Information


Company Profile 


Dingtek Technology Group locats in China and has three branches in Beijing, Qingdao, and Hongkong. It has independent R & D center , production center and 24-hour quick response service network .


Since 2006 , Dingtek has been focused on embedded systems development , automation research and application. Our main business areas covers sensors design and manufacturing, embedded system design and development, complicated system integration and etc. The application covers automation, automotive, locomotive,new energy.


Besides the standard products, we also offer ODM/OEM for cusotmers special requirement. Not only software design, but also hardware design.We provide not only products, but also satisfactory service !






Our factory and team

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