Selecting the right probe

Capacitive probes vs. float switches: choosing the right level sensing solution

At BIBUS when it comes to reliable level measurement in industrial and commercial applications, the choice often boils down to two popular options: capacitive probes and float switches. Both technologies are highly effective, but the right choice depends on your specific requirements. Here we provide guidance to help you select the optimal solution using a decision matrix.

What are capacitive probes?

Capacitive probes are advanced sensors that measure liquid levels based on changes in capacitance. These sensors are highly versatile and can detect a wide range of liquids, including conductive and non-conductive fluids. They are often used in:

• Industrial process control;

• Hazardous environments;

• Applications requiring high precision and minimal maintenance;

Advantages of capacitive probes:

• No moving parts, reducing the risk of mechanical failure;

• High sensitivity to detect small changes in fluid levels;

• Suitable for challenging environments, such as high pressure or temperature;

• Can measure both liquids and solids;

• Can measure corrosive fluids without damaging the sensor;

What are float switches?

Float switches are mechanical devices that rely on a buoyant float to activate or deactivate a switch as liquid levels change. They are a cost-effective and straightforward solution for level monitoring in:

• water tanks and reservoirs;

• sump pumps and drainage systems;

• simple on/off level control applications;

Advantages of float switches:

• economical and easy to install;

• ideal for basic level detection and control;

• proven technology with a long track record of reliability;