OTT CBS 500 Compact Bubbler Sensor

Overview The Ott CBS 500 is a versatile bubbler sensor for accurate water level measurement in surface water and groundwater applications. It uses the proven air-bubble principle, ensuring reliable performance even in dirty or dynamic conditions, as no electronics are submerged. The sensor delivers precise and stable measurements with high resolution and accuracy across measuring ranges up to 15 m and 30 m. Its low-maintenance design , including an integrated purge function, reduces servicing effort and supports long-term monitoring installations. Designed for modern monitoring networks, the CBS 500 offers flexible digital integration via SDI-12 and RS-485 (Modbus RTU) and can be easily connected to Ott, Sutron, and third-party dataloggers. It is optimized for remote and off-grid operation , supporting battery and solar-powered stations. Benefits Accurate and dependable results With a resolution of 1 mm and accuracy of up to ±3 mm in shallow ranges, the CBS 500 delivers precise and repeatable water level data across measuring ranges up to 15 m or 30 m. Built for remote and off-grid stations The CBS 500 operates on 12/24 V DC and supports battery or solar power. Intelligent pump control minimizes energy consumption while ensuring reliable operation, making it ideal for remote monitoring sites with limited power availability. Proven technology for reliable level data The Ott CBS 500 uses the proven air bubble principle to measure water level indirectly, making it ideal for surface water and groundwater applications where sensors are exposed to sediment, fouling, or aggressive conditions. No submerged electronics means stable measurements, even in dirty or dynamic water. One solution for surface water and groundwater By selecting the appropriate bubble chamber, the CBS 500 can be used in observation wells, rivers, channels, and reservoirs. Thus, the CBS 500 offers a single, versatile solution for multiple hydrological applications Low maintenance and long service life The CBS 500 features an integrated purge function that clears the measuring tube and bubble chamber of minor contamination using a high-volume air pulse. No air drying unit is required for most applications. This leads to reduced maintenance effort, fewer site visits, and lower total cost of ownership. Flexible integration into existing networks With native SDI-1, SDI-12 via RS-485 and Modbus RTU interfaces, the CBS 500 connects easily to OTT, Sutron, and third party dataloggers. Measurement units (metric or imperial) are factory preset and fully configurable. It enables seamless integration into new or existing stations without vendor lock-in.