ST-760 Series Online Free Chlorine Sensors

        The ST-760 Series Online Free Chlorine Sensors adopt a proprietary electrochemical principle, featuring a membrane-free, electrolyte-free, and consumable-free design. Equipped with innovative electronic activation cleaning for electrodes, they ensure long-term stable operation. The ST-765SS model comes with a replaceable electrode tip, further reducing the post-operation and maintenance costs of the sensor. It also has a built-in transmitter, supporting digital or analog signal output. Its simplified design allows for on-site installation, calibration, and operation.

        The ST-760 Online Free Chlorine Sensor includes temperature compensation and pH compensation. Through a unique algorithm, it maintains high accuracy even when exposed to a wide range of flow rate variations. Additionally, it offers the world’s first 3-parameter composite sensor, enabling a single sensor to output three parameters: free chlorine, pH, and temperature—making it the optimal choice for on-site applications such as tap water, secondary water supply, and swimming pools.

Typical Applications

        Suitable for various scenarios including tap water, municipal water pipelines, secondary water supply, and drinking water systems.

Instrument Features

• Adopts a proprietary electrochemical principle, with dual-parameter compensation (temperature and pH). A unique algorithm significantly reduces the impact of flow rate on free chlorine measurement.

• Features innovative electronic activation cleaning for electrodes, no mechanical parts, and ensures long-term stable operation.

• The ST-765SS model has a replaceable electrode tip, and its membrane-free, electrolyte-free, and consumable-free design results in extremely low daily maintenance and operating costs when used in tap water or drinking water conditions.

• Built-in transmitter: No preamplifier or display unit required, directly outputting isolated RS485 and 4-20mA signals for more stable and accurate long-distance transmission.

• Calibration, data logging, and diagnostics can be performed on a PC or smartphone via a Bluetooth/USB adapter.

• Self-cleaning flat electrode design for easy maintenance and cleaning. An optional self-cleaning flow cell is available, which uses water flow to drive a cleaning brush for real-time cleaning of the electrode tip. This effectively handles harsh water quality and greatly extends the sensor’s maintenance cycle.

• World’s first 3-parameter composite sensor: A single sensor detects 3 parameters (free chlorine, pH, and temperature), with values output via RS485 communication.

• Undergoes pressurized aging test and pre-calibration before delivery, and is shipped safely with protective solution.

• Standard IP67 aviation connector, which can be directly connected to Pyxis UC-50/UC-100 universal controllers.