DF556 Pressure Liquid Level Sensor
DF556 Pressure Liquid Level Sensor
Immersed Pressure Measurement with Standard and ATEX Versions
DF556 provides pressure-based immersed liquid level measurement from 2.5 m to 15 m with 0.5% FS accuracy and 1 mm resolution. Available in standard (blue body) and ATEX explosion-proof (orange body) versions with NB-IoT, LoRaWAN, Sigfox, 4G, and multi-tech wireless, three pipe thread sizes, and optional battery or external power.
Last updated: May 31, 2026
Customer Value
Built for immersed tank measurement where pressure sensing is preferred
High-Accuracy Pressure
0.5% FS accuracy with 1 mm resolution. 304 stainless steel sensor with PTFE cable for reliable immersed measurement from 2.5 m to 15 m.
Standard + ATEX Versions
Blue ABS standard version for general use or orange ABS ATEX version with explosion-proof + CE certification for hazardous-area tank monitoring.
Flexible Pipe Threads
Three sizes (1.5, 2, 2.25 inch) to adapt to existing tank inlets, reducing installation complexity and custom fabrication.
Multiple Wireless + Protocols
NB-IoT, LoRaWAN, Sigfox, 4G, and multi-tech. TCP, MQTT, and custom protocols with Python/JavaScript SDK.
Flexible Power Options
Optional 8500 mAh battery or external power supply for sites with or without wiring access.
Platform Integration
Dashboard, email/SMS/Telegram notifications, and customer platform integration with SDK support.
Hard Facts
Hard facts for product evaluation
Pressure measurement accuracy
Level resolution
Measuring range options
Waterproof protection rating
Weight with 2.5 m cable
Pipe thread: 1.5/2/2.25 inch
NB-IoT, LoRaWAN, Sigfox, 4G, Multi-tech
Standard + ATEX explosion-proof
Applications
Immersed pressure sensing for tanks, industrial storage, and hazardous areas
DF556 is suitable for projects where immersed pressure measurement better fits the tank structure or measurement depth, and where pipe thread mounting simplifies installation.
Comparison
DF556 vs DF555 Level Sensors
Use this comparison to choose between pressure-based DF556 and ultrasonic DF555 for liquid level monitoring.
| Selection factor | DF556 Pressure Liquid Level Sensor | DF555 Ultrasonic Level Sensor |
|---|---|---|
| Measurement principle | Pressure-based, contact with liquid | Ultrasonic, non-contact |
| Maximum range | 2.5 m to 15 m | Up to 5 m, 20 cm blind area |
| Accuracy | 0.5% FS / 1 mm resolution | 3 cm |
| Installation | Threaded into tank inlet | Top-mounted, threaded or screw |
| Protection | IP67, ABS + 304 SS + PTFE | IP67, ABS or ABS+PC |
| Wireless options | NB-IoT, LoRaWAN, Sigfox, 4G, Multi-tech | NB-IoT, LoRaWAN, 4G, Multi-tech |
| Protocols | TCP, MQTT, custom protocols | TCP protocol |
| When to choose | Choose DF556 when pressure-based immersed measurement, deeper ranges (up to 15 m), or pipe thread mounting is preferred. | Choose DF555 when non-contact ultrasonic measurement is preferred for tanks up to 5 m without liquid contact. |
Product Video
DF556 pressure liquid level sensor demonstration
Watch the DF556 standard version demo. For the ATEX version, see the DF556 ATEX video.
Selection Guide
How to Choose the Right DF556 Configuration
Select the right DF556 version based on tank depth, inlet size, liquid type, and network coverage.
Where to Buy
Request a DF556 project quotation
DF556 is sold by quotation. Share tank depth, liquid type, standard or ATEX, pipe thread size, wireless network, and rollout scale so CNDINGTEK can prepare a quotation.
Useful inputs for faster quoting
- Standard or ATEX explosion-proof version
- Tank depth, liquid type, and required measurement range
- Pipe thread size (1.5, 2, or 2.25 inch) and cable length
- Wireless network, power option, quantity, and delivery schedule
FAQ
Frequently Asked Questions about DF556 Pressure Liquid Level Sensor
What is the measuring range of DF556?
DF556 supports pressure-based immersed measurement from 2.5 m to 15 m with standard 2.5 m range. Custom cable lengths available.
DF556 standard vs ATEX?
Standard has blue ABS body for general industrial use. ATEX has orange ABS body with explosion-proof + CE certification for hazardous areas.
Which wireless versions does DF556 support?
NB-IoT, LoRaWAN, Sigfox, 4G (Asia/Europe/Global), and multi-tech. TCP, MQTT, and custom protocol support with Python/JavaScript SDK.
What pipe thread sizes are available?
Three options: 1.5 inch, 2 inch, and 2.25 inch to adapt to existing tank inlets.
What power options does DF556 support?
Optional 8500 mAh battery or external power supply, selectable based on site wiring availability.
What material is the sensor made of?
ABS body, 304 stainless steel pressure sensing part, and PTFE cable for corrosion resistance.
Can DF556 connect to customer platforms?
Yes. Cloud dashboard, email/SMS/Telegram notifications, and customer platform integration available.
Is DF556 a standard or customized product?
Normally sold with standard and ATEX versions. Custom cable lengths and ranges available. Quotation-based pricing.
CNDINGTEK Support
Evaluate DF556 for your liquid level project
Share tank depth, liquid type, standard or ATEX version, pipe thread size, and network preference.