Close-up of the digital residual chlorine electrode tip, featuring a large-area double platinum ring core for high-precision, stable water quality measurement.
Online free chlorine sensor undergoing rigorous laboratory calibration to ensure measurement stability and accuracy for municipal and industrial water treatment processes.
Technical dimensions schematic of the industrial chlorine probe, detailing the customizable insertion depth and standard NPT 3/4 installation thread for process integration.
Close-up of the digital residual chlorine electrode tip, featuring a large-area double platinum ring core for high-precision, stable water quality measurement.
Online free chlorine sensor undergoing rigorous laboratory calibration to ensure measurement stability and accuracy for municipal and industrial water treatment processes.
Technical dimensions schematic of the industrial chlorine probe, detailing the customizable insertion depth and standard NPT 3/4 installation thread for process integration.

LT7700I Digital Constant Voltage Free Chlorine Sensor for Pools

The LT7700I digital RS485 residual chlorine sensor features a built-in microprocessor and double platinum ring for accurate pool monitoring.

● Integrated Digital RS485 Output: A built-in microprocessor directly outputs standard MODBUS RTU RS485 signals, eliminating the need for a traditional transmitter while providing superior resistance to environmental electrical interference.
● High-Precision Double Platinum Ring: Engineered with a large-area double platinum ring that guarantees fast response times and highly stable residual chlorine measurement data, suitable for both clean tap water and complex industrial sites.
● Rugged Anti-Corrosion Build: Constructed from specially formulated POM material with an IP68 waterproof rating and a double liquid junction design, ensuring maximum durability and a significantly extended service life in harsh chemical environments.
● Direct Pipeline Integration: Features a standard NPT 3/4 installation thread, allowing maintenance teams to quickly, securely, and directly install the sensor into the process line without complex mounting hardware.

RS485 Digital Residual Chlorine Sensor Features

The Digital RS485 Residual Chlorine Sensor for Pools, manufactured by LOOTEST, revolutionizes water quality monitoring by integrating a microprocessor directly into the probe. This advanced digital residual chlorine sensor eliminates the need for traditional transmitters, outputting standard MODBUS RTU signals for superior electrical anti-interference. Featuring a highly stable double platinum ring and a rugged POM body, it delivers precise 0-20mg/L measurements. Designed for facility managers and industrial engineers, it solves complex continuous monitoring challenges in commercial pools, tap water plants, and harsh chemical environments. With a customizable 90mm insertion depth, IP68 rating, and NPT3/4 thread, it ensures seamless pipeline integration.

Industrial Free Chlorine Electrode Technical Specifications

Measuring Range: 0~20mg/L
Temperature Range: 0~100°C
Pressure Resistance Range: 0~3Bar, 6 Bar MAX
Temperature Compensation Type: Optional: NTC22K
Factory Slope: Higher than 95%
Response Time: <10S
Salt Bridge Type: Porous ceramic core
Reference Electrolyte: Conventional PCG Polymer Gel
Reference Type: Double Salt Bridge Reference
Mounting Thread: NPT3/4″
Housing Material: POM+Glass
Insertion Depth: 90mm (Others Customizable)
Cable Connection: Integrated direct connection type
Power Supply: 6-30VDC
Communication: RS485 Modbus RTU

Online Residual Chlorine Probe Application Areas

Unlike conventional glass electrodes that are strictly limited to clean water applications, the LT7700I is engineered with a rugged POM body, an advanced double platinum ring, and superior electrical interference resistance. This unique design allows it to transition seamlessly from highly purified municipal networks to harsh, complex industrial sites.

● Municipal Tap Water & Secondary Water Supply: Ensures highly stable, real-time chlorine tracking for public drinking water safety. The highly sensitive double platinum ring guarantees precise data capture even in low-concentration, heavily treated clean water networks.
● Commercial Swimming Pools & Spas: Delivers continuous, reliable water quality monitoring to maintain safe recreational environments. Its IP68 waterproof rating allows for direct submersion, while the fast response time (<10S) ensures immediate detection of chlorine drops.
● Harsh Industrial Process Control: Built to withstand complex industrial sites where standard sensors frequently fail. The corrosion-resistant POM material and double liquid junction thrive in chemical processing, cooling towers, and industrial wastewater, while the RS485 digital signal strongly resists heavy environmental electrical interference.
● Automated Chemical Dosing Equipment: The built-in microprocessor and standard MODBUS RTU protocol make it the ideal plug-and-play sensing component for smart dosing controllers and chemical skids, enabling precise automation to prevent under- or over-chlorination.

Extra Information

RS485 Digital Residual Chlorine Sensor Features

● Integrated Microprocessor Design: Eliminates the need for a traditional transmitter by processing signals directly within the probe, outputting a standard MODBUS RTU RS485 signal for superior environmental anti-interference.
● High-Precision Double Platinum Ring: Engineered with a large-area double platinum ring sensing element that guarantees exceptionally stable measurement data and fast response times (<10S) in both clean and complex water.
● Corrosion-Resistant POM Body: Constructed from specially formulated POM material with an IP68 waterproof rating, ensuring extreme durability and resistance to harsh industrial chemical environments.
● Advanced Double Liquid Junction: Features a robust double liquid connection structure and specialized porous ceramic core, significantly extending the sensor’s service life during continuous online monitoring.

Custom Digital Chlorine Probe Benefits

● Flexible Insertion Depths: The standard 90mm electrode insertion depth can be fully customized to perfectly match the specific flow cells, pipelines, or tanks of your industrial system.
● Upgradable Ceramic Core: To tackle more demanding and complex industrial media, the standard single-point porous ceramic core can be seamlessly upgraded to a double-point or triple-point configuration.
● Extended Signal Reach: Equipped with an integrated direct connection design, the communication cable can be safely extended up to 100 meters without signal degradation or data loss.

Online Water Quality Chlorine Probe Applications

● Municipal & Tap Water Networks: Ensures strict hygiene compliance and highly accurate, real-time residual chlorine tracking for secondary water supply and public drinking water safety.
● Commercial Swimming Pools: Delivers continuous, reliable water quality monitoring to maintain optimal hygiene levels and safe recreational environments, fully supported by its IP68 submersible rating.
● Automated Dosing Equipment: The perfect plug-and-play digital sensor for smart chemical dosing controllers, utilizing its fast RS485 output for precise, drift-free automation.
● Harsh Industrial Processes: Unlike standard glass electrodes that are strictly limited to clean water, this rugged POM and platinum sensor thrives in complex industrial cooling, wastewater, and chemical processing facilities.

Request Quotes for Free Chlorine Analyzers

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