BLS Level Sensor

BLS Level Sensor uses Frequency-Sweep Technology, offering versatility (liquids, foams, granules), maintenance-free operation, shock resistance, and fast response (<100ms). It supports CE certification, operates at -40°C to 115°C, and is ideal for pharmaceuticals (drugs, powders), food (beer, yogurt), petrochemicals (oil, ammonia), marine (bilge monitoring), and water management.

Automatic adaptation to medium

For applications in food and beverage with changing recipes or batch production, the BLS Level Sensor offers true added value thanks to adaptive setting of the switching point. Without any parameterization effort, the sensor adapts the switching point to the medium for reliable detection. This ensures maximum flexibility and minimized set-up time.

Unaffected by adherence

Even adherence typically present in pasty media will not impair the sensor performance. In the event of any adherence, the sensor adapts the switching level without the need for any parameterization and hence will increase process safety

Optimized for cleaning processes

During cleaning processes, such as CIP cleaning, sensors frequently switch incorrectly as they cannot differentiate between the process media and the cleaning media. The BLS Level Sensor masters this challenge by ignoring cleaning media such as caustic soda solution and acids during the cleaning process.

Features of BLS Level Sensor

Versatility:

Suitable for diverse media: liquids, foams, bulk materials, granules, and sticky or viscous substances, with no on-site calibration required.

Single sensor detects multiple media (e.g., liquids, solids, oil-water separation).

High Precision and Stability:

Uses Frequency-Sweep Technology for maximum temperature stability and repeatability.

Fast response time (<100ms), ideal for dynamic monitoring.

Maintenance-Free and Durable:

No maintenance needed, compact and aesthetic design, built for long-term use.

Resistant to shock and vibration, suitable for harsh industrial environments.

Flexible Installation:

Can be installed in any orientation, adaptable to various tanks and pipelines.

G 1/2" process connection with PEEK plastic tip for corrosion resistance.

Integrated Electronics and Output:

Supports PNP output or PWM signal, analyzed via PLC.

Powered via M12 connector (12–30 VDC, max 35 mA), with high-visibility blue LED for switch status.

Environmental Adaptability:

Process temperature: -40°C to 115°C (some models 85°C).

Ambient temperature: -40°C to 85°C (some models 70°C).

Point Level Sensor Detection:

Regardless of the medium type, RF admittance sensors reliably and accurately detect the point level of media in tanks, containers, or pipelines. This enables early detection of pump dry-running conditions and prevents media overflow.

Foam and Separation Layer Detection:

With the interval trigger function, RF admittance sensors can detect separation layers, such as beer/foam or oil/water interfaces. By supporting two switch outputs, the sensor reliably performs media detection and accurately distinguishes different liquids. The graphical display function ensures production processes can be traced and optimized more efficiently.

Frequency-Sweep Technology:

The electrode integrated in the sensor probe forms a capacitor with the surrounding environment, with its capacitance determined by the dielectric constant of the medium. The capacitor, together with an inductor coil in the sensor circuit, creates a resonant circuit. Based on the measured resonant frequency and the adjustable switching range, the sensor triggers a switch signal.

The versatile RF admittance sensor can detect any medium—whether solid granules, liquids, or viscous substances. This intelligent level switch is considered the ultimate replacement for tuning fork technology.

Applications

The Capacitive BLS Level Sensor is used in various industries for precise level detection:

BLS Sensor for Industrial Automation:

Level detection in tanks, containers, and pipelines for stable production lines.

Protects pumps from dry running, extending equipment life.

Pharmaceutical and Laboratory:

Detects liquids, pastes, powders, granules, and tablets, meeting high hygiene standards.

Typical media: liquid drugs, pastes, powder raw materials.

BLS Level Sensor for Food and Beverage:

Monitors water, dairy, beer, yogurt, coffee beans, liquid chocolate, and edible oils.

Suitable for high-viscosity or sticky substances (e.g., sauces), compliant with food safety standards.

 Chemical and Petrochemical:

Detects water, wastewater, oil, ammonia, methanol, etc., with strong corrosion resistance.

Used in hazardous environments (e.g., petrochemical plants) with ATEX certification.

Marine and Shipping:

Monitors bilge levels (e.g., BLS 9200 Bilge Level Switch) for safety and leak prevention.

Corrosion-resistant, reliable in marine environments.

BLS Level Sensor for Water Management:

Supports wastewater management and water resource allocation in treatment facilities.

Other Industries:

Railways and automotive: For vehicle liquid level monitoring.

Energy plants: For level control in power generation equipment.

Machinery and equipment manufacturing: For tank and pipeline level management.