LHMA-2100CL
Online Chlorine and Total Chlorine Analyzer
Residual/Total Chlorine Online Analyzer
Product Overview
Online continuous monitoring of free and total residual chlorine in water using DPD colorimetry for stable, reliable, unattended operation in applications such as drinking water, recirculating water, and wastewater treatment. The LMTA-2100CL employs the classic DPD (N,N-diethyl-p-phenylenediamine) colorimetric detection principle (per GB/T 11898-1989, "Water quality — Determination of free and total chlorine by N,N-diethyl-1,4-phenylenediamine spectrophotometry"). After the sample and reagents mix and develop color in the reaction cell, a photodetector measures color intensity to calculate residual chlorine concentration. Unlike electrode-based methods, colorimetry is unaffected by pH, temperature, turbidity, or electrode drift, delivering stable, repeatable results without requiring periodic membrane replacement—ideal for long-term continuous online operation. The instrument integrates automatic sampling, reagent dosing, color development, colorimetric measurement, and drain cleaning. It features a 4.3-inch touchscreen display and supports 4–20mA and Modbus-RTU communication for remote integration with PLC and SCADA systems.
Product Features
- DPD colorimetric method, stable measurement
- Free Chlorine / Total Chlorine (Optional)
- Fully Automated
- Reagent Level Monitoring
- Rich interfaces for easy integration
- Low maintenance
- Compact, wall-mounted design. OEM/ODM customization available.
Technical Specifications
| Project | Parameters |
| Product Model | LMTA-2100CL |
| Measurement Principle | DPD Colorimetric Method (Photoelectric Colorimetry) |
| Measurement Range | 0.00 ~ 5.00 mg/L (as Cl₂) |
| Resolution | 0.01 mg/L |
| Accuracy | ±5% or ±0.03 mg/L (whichever is greater) |
| Repetition | ±3% F.S. or ±0.02 mg/L, whichever is greater |
| Measurement Cycle | Adjustable 2.5 ~ 720 min, default 5 min |
| Sample Temperature | 5 ~ 40 ℃ |
| Sample Pressure | Recommend 1 bar |
| Show | 4.3-inch color touchscreen |
| Output Signal | 2 channels, 4-20mA; RS485 Modbus-RTU; 3 relay outputs (alarm/system fault); |
| Power Supply | AC 220V ±10%, 50Hz (optional DC 24V) |
| Installation Method | Wall-mounted |
| Enclosure Protection | IP5 |
Order Details
| Order Number | Description |
| 10-0505-10 | LMTA-2100CL Free Chlorine Online Analyzer, 220VAC |
| 10-0505-20 | LMTA-2100CL Online Residual Chlorine Analyzer, 24VDC |
| 10-0605-10 | LMTA-2100CL Total Chlorine Online Analyzer, 220VAC |
| 10-0605-20 | LMTA-2100CL Total Chlorine Online Analyzer, 24VDC |
| 20-0505-05 | Free Chlorine Reagent Kit, 500ml Kit, approx. 2500 uses |
| 20-0505-10 | Chlorine Residual Reagent Kit, 1000ml Set, approximately 5000 uses |
| 20-0605-05 | Total Chlorine Reagent Kit, 500ml Kit, approximately 2500 tests |
| 20-0605-10 | Total Chlorine Reagent Kit, 1000ml Kit, approximately 5000 tests |
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