The new Ott CBS 500

Building on What Works

One of the key strengths of the OTT CBS 500 is that it intentionally preserves the core elements that users rely on:

• The same proven bubbler measurement principle
• The same reliable pump and valve system
• The same indirect water level measurement approach

This continuity ensures that existing users do not face changes in methodology or acceptance risks. Instead, they benefit from a familiar system that has been enhanced where it matters most 

Designed for the Digital Era

The most significant advancement of the OTT CBS 500 lies in its completely redesigned electronics platform. Unlike the legacy CBS, the new system is built from the ground up for modern monitoring environments:

• New, future-oriented electronics architecture
• Designed for long-term integration into digital platforms
• Not a retrofit, but a true next-generation design

This transformation ensures that the CBS 500 is ready to support evolving requirements in data management, connectivity, and system integration

Native Digital Connectivity

Modern monitoring networks require seamless digital communication. The OTT CBS 500 meets this need with standardized interfaces:

• SDI-12
• RS-485
• Modbus RTU

In contrast to the legacy CBS, the device no longer uses analog outputs such as 4–20 mA. This shift ensures reliable compatibility with current and future data logger architectures and simplifies integration into digital systems.

Beyond Measurement: Data with Context

A defining feature of the OTT CBS 500 is its ability to provide metadata and diagnostics alongside measurement values.

Instead of delivering only a water level reading, the system supplies additional context, including:

• Statistical information (e.g., mean, minimum, maximum values)
• Measurement characteristics
• Operational status information

This enriched dataset enables users to better interpret, validate, and trust the measured values—an essential requirement in modern hydrological monitoring.

Integrated Diagnostics and Sensor Health Monitoring

The OTT CBS 500 continuously monitors its own internal condition, offering insights such as:

• Device status (e.g., normal operation, low voltage, pump issues)
• Internal temperature
• Housing humidity and dew point

This level of transparency allows operators to detect potential issues early and respond proactively.

From Reactive to Preventive Maintenance

Thanks to its advanced diagnostics and metadata capabilities, the OTT CBS 500 supports a shift toward preventive maintenance strategies.

Instead of reacting to failures, operators can:

• Identify emerging issues early
• Reduce unplanned downtime
• Optimize service intervals

The result is improved system reliability and reduced operational costs over time.

Ready for Future Monitoring Systems

With increasing demands for connectivity, automation, and data quality, monitoring systems are evolving rapidly. The OTT CBS 500 is designed to meet these demands:

• Fully compatible with modern data platforms
• Enables remote quality assurance and quality control (QA/QC)
• Supports long-term digital infrastructure strategies

This makes the CBS 500 not only a replacement—but a strategic upgrade for future-ready monitoring networks.

A Natural Evolution

The OTT CBS 500 represents a clear and deliberate evolution:

It preserves the proven mechanical reliability of the original CBS while introducing the digital capabilities required for modern monitoring applications.

For existing users, this means a smooth transition with immediate added value. For new installations, it offers a robust, future-proof solution designed for the next generation of hydrological monitoring.

Conclusion

The OTT CBS 500 bridges the gap between trusted measurement technology and the demands of today’s connected world. By combining accuracy, diagnostics, and digital integration, it sets a new standard for bubbler-based water level measurement.