The industrial-specific online residual chlorine controller A11CL uses TS-238-10M residual chlorine electrode. The key benefits include precision, the capacity to adapt to many situations, smart operation, and strong anti-interference. The instrument measures residual chlorine content and temperature from 0-20.00ppm (mg/L) synchronously with three temperature compensation modes: PT1000/NTC10K/manual.
It supports bilingual interfaces in Chinese and English and features two isolated 4-20mA signal outputs and three freely programmable relay alarms. Sewage treatment, water supply, medicine, chemical industry, and food use it for steady and reliable 24-hour residual chlorine monitoring.
★★★★★
Features
Specifications
| Category | Specifications |
|---|---|
| Measurement Principle | Electrochemical method (matching TS-238-10M residual chlorine electrode) |
| Measurement Parameters | Residual Chlorine, Temperature |
| Measurement Range | Residual Chlorine: 0~20 ppm / 0.0~20.0 ppm / 0.00~20.00 ppm (switchable); Temperature: 0~100℃ (compensation range) |
| Display Resolution | Residual Chlorine: 0.01 ppm; Temperature: 0.1℃ |
| Measurement Accuracy | Residual Chlorine: ≤±0.1 ppm; Stability: ≤0.1 ppm/24 hours |
| Compensation Function | Temperature Compensation: Manual / Automatic (PT1000 / NTC10K); Optional Pressure / Salinity Compensation |
| Signal Output | 2 groups of 4-20mA isolated output (corresponding to residual chlorine and temperature respectively), maximum load 500Ω |
| Alarm Output | 3 groups of relays (3A/250VAC), normally open contacts; support high/low point switching, hysteresis adjustable |
| Communication Function | Optional ModBus RTU (RS485), baud rate: 2400/4800/9600/19200 bps |
| Physical Parameters | Dimensions (H×W×D): 96×96×128 mm; Cutout Size: 92×92 mm; Display: LCD screen with backlight (30s/60s/120s/always on adjustable); Operation Interface: Chinese/English switchable |
| Power Supply | AC220V or DC24V; Power Consumption: ≤7W |
| Operating Environment | Temperature: 0~50℃; Relative Humidity: ≤85% RH (no condensation) |
| Standard Accessories | A11CL Host (1 pc); TS-238-10M Residual Chlorine Electrode (1 pc); Electrode Flow Cell (1 pc); Fixing Bracket (1 set); Special Signal Cable (1 pc); User Manual (1 copy) |
Standard Configuration
- Host:A11CL
- Residual chlorine electrode: TS-238-10M
- Electrode flow channel: PP-86
Core Highlights
- With a measurement precision of ± 0.1 ppm and a stability of less than 0.1 ppm over a 24-hour period, this data is extremely precise and consistent.
- PT1000 and NTC10K can be manually or automatically adjusted. They operate in the temperature range of 0 to 100 °C.
- Strong anti-interference: The 4-20mA output keeps communications separate from electromagnetic fields in factories.
- You can set alarms for time, high and low points, and in and out of intervals using three sets of relays. It is possible to modify hysteresis to reduce its unpredictability.
- Highly adaptable: 6 display modes (varying precision and unit switching), flow/immersion installation, and many industrial applications.
Featured Applications
- Wastewater treatment plant: Continuous monitoring of residual chlorine in the effluent of the disinfection tank, linked with a dosing system to ensure that the discharged water quality meets environmental standards.
- Municipal water supply: Water treatment plant effluent and pipeline monitoring, real-time control of residual chlorine concentration, ensuring safe transportation of drinking water.
- Pharmaceutical industry: Monitoring of residual chlorine in production process water to meet hygiene and compliance requirements for pharmaceutical water and avoid water quality affecting product quality.
- Chemical industry: residual chlorine detection in industrial circulating water and process wastewater to prevent excessive chlorine content from corroding equipment or affecting the process flow.
- Food industry: Continuous monitoring of residual chlorine in food processing water to ensure the hygiene of production water and comply with food industry safety standards.
Daily maintenance and precautions
Installation and usage precautions
- Installation: Use a panel with a 92 × 92mm opening to prevent exposure to extreme temperatures, humidity, corrosive conditions, and direct sunlight.
- Electrode installation: The electrode is fixed with PG13.5 threads, and when used with a flow channel, the inlet and outlet water pipelines must be unobstructed (compatible with 9.5mm pipes).Signal transmission requires special cables that cannot be replaced with ordinary wires.
- Wiring: To reduce interference from dosing and mixers, use a separate power source. When the instrument interface is hooked up to other devices, it needs to be protected by a relay that can handle current.
- For slope calibration, a steady water sample is injected for 15 minutes and modified according to laboratory results. Zero calibration requires pure water without chlorine.Electrodes must be cleaned and wiped dry before calibration to ensure membrane cleanliness.
- The default password is 0000. To prevent non-professionals from mistakenly operating important parameters, update the password after use.
Key daily maintenance points
- Instrument maintenance: Regularly clean the instrument casing to avoid contact with organic solvents such as toluene and xylene; Before long-term use, it is necessary to restore the factory settings and cut off the power, and store it properly.
- Electrode maintenance: The electrode needs to be regularly cleaned of the membrane to avoid contamination affecting the measurement; The electrolyte should be replaced regularly (according to the usage frequency of 2 weeks to 2 months), and the membrane should be replaced promptly if it is damaged.
- Calibration cycle: It is recommended to perform zero point and slope calibration once a month. For scenarios with large temperature fluctuations or complex water quality, it can be shortened to once every two weeks.
- Whether the signal output isn’t normal, check to see whether the cable is broken or the wiring is loose. Before recording data drift, make sure to calibrate or check the status of the electrode.
Technical Support
Top 6 Industrial Gas Analyzers Manufacturers 2025
Introduction to Industrial Gas Analyzers Industrial gas analyzers are critical instruments used across numerous sectors to measure and monitor the composition of gas mixtures in various processes. These sophisticated devices…
6 Best Industrial Gas Detector Manufacturers in the World
With industrial safety standards becoming more stringent each year, organizations worldwide are investing in high-precision gas detection technologies. Choosing the Best industrial gas detector manufacturers ensures operational safety, regulatory compliance,…
9 Best Portable Carbon Dioxide Detector 2025 – Complete Buying Guide
Why You Need the Best Portable Carbon Dioxide Detector In today’s world where air quality monitoring has become increasingly important, having the best portable carbon dioxide detector is crucial for…
Top 7 portable combustion analyzer Tested
Introduction to Portable Combustion Analyzers A portable combustion analyzer is an essential diagnostic tool for technicians, engineers, and facility managers working with combustion systems. These sophisticated instruments measure and analyze…
The A11CL online residual chlorine controller has become the preferred equipment for continuous monitoring of industrial residual chlorine due to its core advantages of high-precision measurement,multi scenario adaptation,and intelligent operation.Whether it is compliant discharge of sewage treatment or water quality control in the pharmaceutical and food industries,it can stably output reliable data,coupled with flexible alarm and communication functions,greatly improving on-site monitoring efficiency and automatic level.
Request a Quote
