Trimod’Besta is a Swiss manufacturer specializing in industrial level measurement and control technology, with its products developed for demanding process applications. The brand is part of the Bachofen AG Group and is recognized for robust level switches, float switches, and level measurement solutions used across industrial, marine, energy, chemical, and process applications.

Trimod’Besta's product portfolio includes the Trimod’Besta Level Switch, Bilge Switch, Single-Point Level Switch, Multi-Level Float Switch, Float Switches, and Level Transmitter. Its distinctive 3-modular level-switch concept allows switch, flange, and float modules to be combined according to the specific requirements of the application.

Core Product Solutions

Trimod’Besta focuses on reliable point-level detection, level control, and process monitoring for liquids in tanks, vessels, machinery, and industrial systems.

Key product solutions include:

• Trimod’Besta Level Switch – modular level-switch technology for alarm, limit, and control functions.

• Bilge Switch – level detection for bilge and marine applications.

• Single-Point Level Switch – compact float switches for monitoring a defined liquid level and triggering alarms, pump control, or emergency-stop functions.

• Multi-Level Float Switch – multiple float switches for vertical installation, allowing several switching points for level detection.

• Float Switches – liquid-level detection devices for controlling pumps or triggering alarms at predefined levels.

• Level Transmitter – continuous level measurement for applications requiring level information rather than simple point-level switching.

The 3-Modular Level Switch Concept

A defining feature of Trimod’Besta is its 3-modular concept, which combines three main elements: the switch module, flange module, and float module. This architecture allows the level switch to be configured according to the required process conditions, installation arrangement, switching function, and interface requirements.

The switch modules can be configured with:

• Mechanical microswitches

• Proximity switches

• SPDT and 2xSPDT switching configurations

• Pneumatic ON/OFF outputs

• Pneumatic proportional outputs

• Explosion-proof versions

• High- and low-temperature versions

• IP65 to IP68 protection options

Float modules are available with fixed or adjustable switching distances and can be configured for pump control, separation-layer monitoring, and different process media. Materials include CrNiMo stainless steel, Hastelloy, and selected engineering plastics.

This modular architecture allows individual components to be selected and combined instead of requiring a completely different instrument for every application. It also provides flexibility when process requirements change or maintenance is required.

Designed for Demanding Process Conditions

Trimod’Besta level switches are engineered for demanding process environments involving elevated temperatures, high pressures, corrosive media, and hazardous industrial applications.

Depending on the selected configuration, important characteristics include:

• Stainless-steel and CrNiMo wetted components

• Hastelloy float options for demanding media

• High- and low-temperature configurations

• IP65, IP66, IP67, and IP68 protection options

• Explosion-proof switch versions

• NACE-compliant float options

• Adjustable switching distances for pump control

• Versions for separation-layer monitoring

Selected industrial configurations are designed for high-pressure and high-temperature service. The Industrial Range, for example, is used in offshore rigs, steam boilers, power stations, chemical and petrochemical plants, heating, refrigeration, and air-conditioning applications.

Level Detection, Alarm and Pump Control

Trimod’Besta level switches can perform different process-control functions depending on their configuration. They can be used to detect minimum or maximum liquid levels, control filling and emptying pumps, trigger alarms, and monitor separation layers between different liquids.

The Single-Point Level Switch range, for example, can be used to trigger visual or audible alarms, control pumps, or activate emergency-stop functions. The Multi-Level Float Switch range provides multiple switching points for applications requiring several predefined level thresholds.

For more demanding industrial applications, the modular system can also provide adjustable operating differentials for pump control, with vertical switching distances available up to 2840 mm and horizontal distances up to 557 mm depending on configuration.

Applications Across Critical Industries

Trimod’Besta products are used for level monitoring and control in applications where dependable point-level detection is essential to process safety and operational continuity.

Key application areas include:

• Oil & Gas and Petrochemical – tank level alarms, pump control, and process-level monitoring.

• Chemical Processing – level detection in applications involving aggressive or challenging media.

• Power Generation – level control and protection in plant and steam-water systems.

• Marine and Offshore – bilge, ballast, and other marine tank-level applications.

• Industrial Plant Engineering – packaged equipment and process machinery.

• Water and Wastewater – sump, drainage, and collection-system level control.

• Heating and Refrigeration – level monitoring and control within plant systems.

Trimod’Besta's Industrial Range is specifically identified for applications including offshore rigs, steam boilers, power stations, chemical and petrochemical engineering, heating, refrigeration, and air-conditioning technology.

Safety, Certification and Reliability

Trimod’Besta provides configurations designed for applications where functional safety and hazardous-area protection are important. Selected products are available with explosion-proof switch modules, intrinsically safe switching elements, and SIL-rated configurations.

The standard range includes SPDT and 2xSPDT configurations with SIL 1 and SIL 2 options, while selected products carry approvals from marine classification societies including ABS, BV, DNV, Lloyd's Register, RINA, and RMRS.

The combination of modular construction, durable materials, configurable switching technology, and application-specific options enables Trimod’Besta to provide reliable level detection and control across demanding industrial and marine environments.

Engineering Quality and Long-Term Performance

Trimod’Besta's modular approach is designed not only for application flexibility but also for practical maintenance. Individual modules can be interchanged when maintenance or changing process requirements demand a different configuration.

With a product range covering modular level switches, bilge switches, single-point and multi-level float switches, float switches, and level transmitters, Trimod’Besta provides level measurement and control solutions for a wide variety of industrial process applications.