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Quick Details

  • Place of Origin: Beijing, China (Mainland)
  • Brand Name: Dingtek
  • Model Number: F550
  • Type: F550 fuel tank level sensor
  • Measurement Range: 20~ 12000mm (for different model)
  • Resolution: 1mm or 0.1%FS, the bigger one
  • Power Supply: 10-32V DC
  • Output Signal: RS485, RS232, 0-3.3V, 4-20mA, TCP
  • Protocol: Modbus RTU/ Dingtek /Customized
  • Operating Temperature: -20~70℃
  • Shell Material: Polyamide
  • Protection Rank: IP66
  • Mounting: Flange

Packaging & Delivery

Packaging Details Packed by strong cartons and foam fillings.We provide standard, strong,protective package for our products to prevent it from outer damage.
Delivery Time Shipped in 12 days after payment
Product Description

Attention: For F550 long range ultrasonic level sensor, the measure range has 2m/5m/12m/30m measure range for select. And this type sensor can built-in wifi/zigbee/gprs/gps/3G module to realize remote monitor fuel level.For more detailed information, please leave message to me. 


The F550 is one type of ultrasonic level sensor which measure the air height in the container directly and calculate the level height based on the total height of the container. The resolution is 1mm or 0.1%FS (the bigger value).

It is applicable for the close container or open container.  Furthermore it can calculate the volume of the container or the liquid. As with RS485, it is easy to integrate into the embedded system or SCADA.

In order to realize remote monitoring, there are wireless version for F550, including zigbee, Wifi, GPRS, 3G. Furthermore, GPS module is one optional for the F550. As a result, F550 can be used as gps tracker also.




Measurement Range

20~ 12000mm (for different model)

Blind Area

2 meter version: 20cm.

5 meter version: 25cm.

12 meter version: 150cm.


1mm or 0.1%FS, the bigger one

Power Supply

10-32V DC

Output Signal

RS485, RS232, 0-3.3V, 4-20mA, TCP


Modbus RTU/ Dingtek /Customized

Operating Temperature


Storage Temperature

-40 ~ 85

Shell Material



Solid or liquid (except strong acid or strong base)

Protection Rank




LED Display





Optional for zigbee, wifi, GPRS, UMTS.


Standard version: 70mm(H)*72mm(W)*72mm(L) or wifi/GPRS/UMTS version: 115mm(H)*72mm(W)*72mm(L)


Mechanical Drawing

System Diagram


Interface Definition

Interface Definition

RS485/232 version

Pin 1: Red Line: V+, 

Pin 2: Blue Line: RS485 A+/ RS232 TX

Pin 3: Black Line: GND

Pin 4: Yellow Line: RS485 B-/ RS232 RX

0-3.3V version

Pin 1: Brown Line: V+, 

Pin 2: Blue Line: 0-3.3V Output

Pin 3: Black Line: GND

(For example, 2 meter version, 2meter air height ---3.3volt, 1meter air height ---1.65v)

4-20mA version

Pin 1: Red Line: V+, 

Pin 2: Blue Line: 4-20mA output

Pin 3: Black Line: GND

(For example, 2 meter version, 2meter air height ---20mA, 1meter air height ---12mA)

Wireless  version (Zigbee/Wifi/GPRS/3G)

Pin 1: Red Line: V+, 

Pin 2: Black Line: GND

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


Installation & Calibration

After installation, the user should input the total height, tank type and other parameter in order that the sensor can calculate the liquid height, volume and etc.


The ultrasonic transducer should be vertical (90 degree) to the liquid level.   

The installation should not be near to the side to avoid the ultrasonic beam contact with the side and echo back.

The ultrasonic transducer should be try to higher +20cm than the maximum liquid level. (the 0-20cm is the blind area for the transducer).


For 0-5V version, the user should measure the total height from the transducer to the minimum level. And use this value to minus the air height value (calculate by the 0-5V output according to the measurement range), then the liquid level is figured out.

For RS232/485 version, the user can directly configure the maximum height into the sensor, and the sensor will output the liquid level based on this input value and the air height.  Of course, if not input maximum height, the air height is still output. 

If user want to get the liter in the tank, user should create the table between height and liter through adding fuel and measuring. 


Model Naming Rules


Packaging & Shipping

Deliver by DHL/UPS/FedEx/EMS optional




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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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