E+H FTL51-72UQ2/0 Vibronic Liquiphant Level Switch FTL5172UQ20

• Extended Product Type: Level Switch

• Product ID: FTL51-72UQ2/0

• E+H Type Designation: Level Switch

Description of Endress+Hauser FTL51-72UQ2/0 Vibronic Liquiphant Level Switch

The Endress+Hauser FTL51-72UQ2/0 Vibronic Liquiphant Level Switch is a highly reliable point level detection device designed for liquid monitoring in industrial process environments. As part of the renowned Liquiphant FTL51 series, this instrument uses vibronic fork technology to provide precise, maintenance-free level detection in tanks, pipelines, and vessels.

The FTL51-72UQ2/0 operates using a vibrating fork that changes frequency when immersed in liquid. This proven vibronic principle ensures highly accurate switching independent of conductivity, dielectric constant, viscosity, density, turbulence, flow conditions, or the presence of bubbles. As a result, the device delivers consistent and dependable level detection even in challenging process conditions.

Built for harsh industrial environments, the FTL51-72UQ2/0 features a robust stainless-steel construction that offers superior corrosion resistance and long service life. Its rugged design ensures stable performance in high-temperature, high-pressure, and aggressive chemical applications.

The instrument is widely used for overfill protection, pump dry-run protection, and high or low level alarm monitoring across industries such as oil and gas, chemical processing, food and beverage production, water treatment, and pharmaceutical manufacturing.

The Liquiphant FTL51 series is known for its easy installation, minimal maintenance requirements, and dependable operation. The plug-and-play design allows quick commissioning, reducing downtime and installation complexity.

With its high operational safety, excellent reliability, and compliance with international industrial standards, the Endress+Hauser FTL51-72UQ2/0 Vibronic Liquiphant Level Switch remains one of the most trusted point level detection solutions for industrial process control.

Technical Specifications for E+H FTL51-72UQ2/0 Vibronic Liquiphant Level Switch

Parameter	Specification
Manufacturer	Endress+Hauser
Model	FTL51-72UQ2/0
Product Type	Vibronic Point Level Switch
Technology	Vibrating Fork (Vibronic)
Measurement Principle	Frequency shift detection when fork is immersed in liquid
Process Medium	Liquids
Process Temperature Range	-50°C to +150°C (depending on configuration)
Process Pressure Range	Up to 64 bar
Output Signal	Relay or electronic switching output
Power Supply	10–55 V DC / 19–253 V AC depending on electronics
Process Connection	Threaded or flanged options
Wetted Material	Stainless Steel (316L)
Enclosure Protection	IP66 / IP67
Installation	Horizontal or vertical mounting
Switching Accuracy	Independent of conductivity, density, viscosity
Response Time	< 0.5 seconds
Certifications	Industrial safety approvals available
Maintenance	Maintenance-free operation
Protection Function	Overfill protection and dry-run protection

Key Features for E+H FTL51-72UQ2/0 Vibronic Liquiphant Level Switch 

1. Reliable Vibronic Measurement Technology
The vibrating fork technology ensures dependable liquid detection regardless of electrical conductivity or fluid characteristics.

2. Maintenance-Free Operation
No calibration or regular servicing is required, reducing maintenance costs and downtime.

3. Robust Industrial Construction
Constructed from corrosion-resistant stainless steel, ensuring durability in harsh process environments.

4. Wide Temperature and Pressure Capability
Suitable for high-pressure tanks and high-temperature process applications.

5. Fast Switching Response
Quick detection of liquid presence or absence improves safety and operational efficiency.

6. Easy Installation and Commissioning
Simple mounting and plug-and-play electronics make installation quick and straightforward.

7. Versatile Industrial Compatibility
Compatible with a wide range of industrial control systems and process automation platforms.

Applications for E+H FTL51-72UQ2/0 Vibronic Liquiphant Level Switch 

The Endress+Hauser FTL51-72UQ2/0 Vibronic Liquiphant Level Switch is widely used across multiple industries for precise point level detection.

Industrial Process Tanks

Used to monitor high and low liquid levels in storage tanks and process vessels.

Overfill Protection Systems

Provides reliable safety shutdown to prevent tank overfilling and product loss.

Pump Dry-Run Protection

Detects absence of liquid to prevent pump damage in pipelines and pumping systems.

Chemical Processing Plants

Suitable for aggressive chemicals and solvents due to its stainless-steel construction.

Food and Beverage Industry

Used for hygienic liquid level monitoring in production and storage processes.

Oil and Gas Facilities

Ensures safe level detection in fuel storage tanks, process vessels, and separation units.

Water and Wastewater Treatment

Provides dependable level detection in treatment tanks and pumping stations.

Frequently Asked Questions (FAQ)

What is the working principle of the FTL51 Vibronic Liquiphant Level Switch?

The device operates using a vibrating fork. When the fork is immersed in liquid, the vibration frequency changes. The electronics detect this change and trigger the switching output.

What liquids can the FTL51-72UQ2/0 detect?

It can detect almost all liquids including water, oils, chemicals, solvents, and refrigerants regardless of conductivity or dielectric properties.

Does the Liquiphant level switch require calibration?

No. Vibronic level switches operate without calibration, making them easy to install and maintain.

What is the primary use of the FTL51 level switch?

The main applications include high-level alarms, low-level alarms, overfill protection, and pump dry-run protection.

Can the device operate in high temperature environments?

Yes. The FTL51 series is designed to handle high process temperatures depending on the specific configuration.

Is the FTL51 suitable for corrosive liquids?

Yes. Its stainless steel construction provides excellent resistance to many corrosive chemicals.

How fast does the level switch respond?

The device typically responds in less than half a second, allowing quick detection of liquid presence.

Can the FTL51 be installed horizontally or vertically?

Yes. The level switch supports multiple mounting orientations depending on the application requirements.