DF520 Ultrasonic Level Sensor

  The DF520 is one kind of ultrasonic liquid level sensor, which can detect the LPG tank liquid level by outside bottom installation without drilling holes. It can work for tank wall thickness up to 25mm. For special thickness, please contact with CNDingtek for confirmation. The resolution is 1mm or 0.1%FS (the bigger value). Measurement ranges from 0-10 meters.


Ultrasonic technology, non-contact measurement

Bottom installation from outside

IP66 Waterproof

24h Remote Monitoring

Low Power Consumption

Wireless Transmission


Information is transimitted to the cloud server through the built-in wireless module (NB-IoT, Lorawan, Sigfox, GPRS). Users can monitor the status remotely. GPS function is optional.



  • Dimension :78*80*30mm 
  • Color :Black
  •  Shell Material :ABS
  • Protection Level : IP66
  • Principle:ultrasonic@40Khz 
  • Detection Range: 4meters
  • Accuracy of height:3cm
  •  Accuracy of temperature :2℃ 
  • Accuracy of angle : 2° (optional) 
  • Communication : NB-IoT/LoRaWAN/Sigfox/GPRS/4G
  • Frequency: NB-IoT :B1/B3/B5/B8/B20/B28 and so on                                                               LoRaWAN : CN470/EU868/US915/AS923/RU868/IN865/KR 920Mhz                        Sigfox : RCZ1/RCZ2/RCZ3/RCZ4                                                                            GPRS :850/900/1800/1900Mhz
  • Operating Temperature  : -20 ~ +70℃ 
  • Storage Temperature : -40 ~ +85℃