Salinity sensor enables online monitoring of TDS and electrical conductivity in industrial water environments

Salinity sensor utilizes a contact-type electrode method and supports RS485 Modbus-RTU signal output. It measures electrical conductivity, salinity, and TDS. Featuring built-in signal isolation and an IP68 waterproof rating, it is suitable for water samples with varying ionic strengths, meeting the requirements for online monitoring in industrial environments.

Salinity sensor employs a contact-type electrode method for detection, making it ideal for environmental water quality analysis. It can test water samples with both high and low ionic strengths, satisfying the needs for online electrical conductivity, salinity, and TDS measurement across most industrial and environmental projects. The sensor uses an RS485 Modbus-RTU interface and incorporates signal isolation technology, which enhances its resistance to interference and ensures stable data acquisition even in complex electromagnetic environments.

Salinity sensor offers excellent reproducibility and thermal stability, with minimal measurement drift, a compact form factor, and a rapid response time—achieving 98% of the signal response in approximately 30 seconds in still water. The probe features a 3/4" NPT pipe thread, allowing for simple installation; it can be submerged directly in water or mounted within pipes and tanks, accommodating various on-site deployment conditions. Housed in an ABS casing with an IP68 waterproof rating, the device remains stable even when continuously submerged for long periods. Its long service life makes it well-suited for long-term, uninterrupted online monitoring applications.

Salinity sensor integrates simultaneous multi-parameter measurement. It covers an electrical conductivity range of 0–30,000 μS/cm, with salinity and TDS measurement ranges of 0–10,000 ppm (also supporting display in ppt). The resolution is 1 μS/cm for electrical conductivity and 1 ppm for TDS and salinity. It offers a temperature measurement accuracy of ±0.1°C, with an overall measurement accuracy of ±1.5%. The device operates reliably in water bodies with varying ion concentrations—ranging from fresh water to saline wastewater—and requires no frequent maintenance or calibration, thereby reducing the operational and maintenance workload in the field.

Salinity sensor is widely used in applications such as industrial water treatment, surface water monitoring, and wastewater discharge monitoring. It provides reliable raw data on total dissolved solids (TDS), electrical conductivity, and salinity for automated water quality monitoring systems, serving as a standard sensing probe for online environmental water quality monitoring projects.