Thermal Level Detector LS 300 & LS 500 | Reliable Overfill Protection System

Protect Your Tanks, Assets & Environment with FAFNIR Level Detection Technology

The FAFNIR LS 300 Sensor and LS 500 Transducer deliver a highly reliable thermal level detection and overfill prevention solution for industrial liquid storage. Designed for hazardous, corrosive, and high-value liquids, this system ensures maximum safety, compliance, and operational efficiency.

With ATEX approval and SIL 2 certification, the LS 300 & LS 500 combination is trusted across Europe for accurate level detection in tanks of all types.

To get a quote or place an order, please, call us on 0345 230 7887 or email sales@bms-ltd.com or click on a button above.

Why Choose the LS 300 & LS 500 Thermal Level Detector?

Quick & Precise Installation

• Simple 2-wire connection to the transducer
• Reverse polarity protection for added safety
• No on-site calibration required
• Fast response time (< 2 seconds)

Dependable Performance

• Reliable high and low level alarms
• Suitable for tanks, IBCs, tank wagons, barrels, and vessels
• Self-testing sensors ensure ongoing accuracy
• Proven with tens of thousands of installations across Europe

Durable & Maintenance-Free

• No moving parts = long service life
• Corrosion-resistant materials (316Ti, Hastelloy, Titanium)
• Zero maintenance after installation
• Designed for harsh industrial environments

Advanced Overfill Prevention You Can Trust

The LS 300 sensor is installed inside the tank, while the LS 500 transducer manages outputs and alarms. Together, they provide:

• Continuous monitoring of liquid levels
• Immediate overfill alerts
• Compliance with German Water Resources Act (WHG)
• Enhanced environmental protection and risk reduction

Applications

The LS 300 & LS 500 system is suitable for a wide range of industries and use cases:

• Industrial storage tanks (above & underground)
• Chemical processing plants
• Fuel storage & transfer systems
• Tanker vehicles & mobile containers
• Pilot plants and prototype systems
• Collecting vats and filling arms

Technical Overview

LS 300 Sensor

• Temperature range: -40°C to +80°C
• Pressure range: 0 to 25 bar
• Fast heating time: <15 seconds at +60°C
• Materials: Stainless steel, Hastelloy, Titanium

LS 500 Transducer

• Power supply: 24 VDC / 115–230 VAC options
• Outputs: Potential-free changeover contacts
• Protection class: IP40
• Supports single or dual level detection configurations

Flexible Configurations for Any Installation

The LS 300 is available in multiple versions to suit your specific requirements:

• Standard threaded or flanged connections
• Plug-in versions for mobile tanks
• Duo sensors for multi-level detection
• Compact and special designs for tight spaces

This flexibility ensures compatibility with virtually any tank type or installation environment

GET A QUOTE

Key Benefits at a Glance

• Accurate thermal level detection
• ATEX & SIL 2 certified safety
• Maintenance-free operation
• Easy installation & integration
• Suitable for hazardous liquids
• Long-lasting, robust design

Get Expert Advice or Request a Quote

Protect your assets with industry-leading level detection technology.

Contact BMS Group today to discuss your application or request a tailored quote.

0345 230 7887  |  sales@bms-ltd.com