Trimod’Besta is a Swiss manufacturer of industrial level measurement and control technology, established in 1966 and headquartered in Uster, Zurich, Switzerland. It operates as a brand within the Bachofen AG Group and has built a strong reputation for highly reliable level switches and sensors used in a wide range of demanding process applications.

Trimod’Besta products are engineered to deliver durable, high-performance level indication and control in applications where robustness, long service life, and compliance with international standards (e.g., ATEX, IECEx, PED, SIL) are critical.

Core Product Solutions

Trimod’Besta’s primary focus is on level measurement products and switches designed to interface directly with process fluids, offering dependable point-level detection and control signals for automation and safety systems.

Modular Level Switches:

The company’s core offering is its 3-modular concept level switches, which are highly adaptable to specific process requirements. Modules can be configured with:

• Electric switch elements (mechanical microswitches)

• Electronic switches (solid-state or proximity outputs)

• Pneumatic switches

• Explosion-proof versions (Ex ed and Ex ia)

This modular architecture allows combinations of float, flange, and switch modules to meet application demands for operating pressures, temperatures, and interfacing needs.

Trimod’Besta’s switch products include:

• Magnetic float level switches for visual and control signals in tanks and vessels

• Intrinsically safe switches for use in hazardous areas

• High/low alarm and pump control switches for automated process control

Float and Sensor Interfaces:

In addition to modular switches, Trimod’Besta makes:

• Bilge and multi-level float switches

• Magnetic level sensors (e.g., through-hull and compact modules)

• Specialized sensor variants capable of handling challenging media (sticky, viscous, pasty, foamed liquids) without requiring on-site calibration.

Accessories and Support Components:

The product range is complemented by field-installation accessories like:

• Counterflanges

• Test actuators

• Flange adapters and custom mounting interfaces

Designed for Robust, Industrial Environments

Trimod’Besta switches are engineered for extreme process conditions — including high pressures, high and low temperatures, aggressive media, and hazardous zones. Housing and wetted components are offered in materials such as stainless steel and special alloys (e.g., Hastelloy) to ensure corrosion resistance and durability.

The company’s products are certified and approved by numerous international and maritime authorities, including class societies such as ABS, BV, DNV-GL, Lloyd’s Register, RINA, and RMRS, and comply with explosion protection standards (ATEX/IECEx).

Trimod’Besta level switches are also capable of Safety Integrity Levels (SIL1/SIL2) and are used in applications requiring functional safety.

Application Domains

Trimod’Besta’s instrumentation is widely specified for critical applications in industries including:

• Oil & Gas and Petrochemical Processing — tank level alarms, pump control, interface detection

• Shipbuilding and Marine Systems — bilge and ballast tank monitoring, LNG/LPG tank level control

• Chemical and Petrochemicals — highly corrosive or aggressive fluids

• Power Generation — steam-water cycle level control and protection

• Plant Engineering — packaged equipment and machine integration

• Water Management and Wastewater — reservoir, sump, and collection system control

• LNG/LPG and Cryogenic Applications — low-temperature level measurement down to –196 °C

These products are used in process safety applications, plant automation, and critical control loops where reliable level detection is essential to operational continuity and safety compliance.

Engineering Quality & Global Reach

Trimod’Besta maintains an ISO 9001 quality management system and manufactures its products with high precision to meet international quality and performance standards.

With roughly 90% of its products exported, Trimod’Besta serves global markets through a comprehensive network of distribution partners and sales representations that provide technical support and application assistance.