LHMA-2100CL
Online Chlorine and Total Chlorine Analyzer
Residual/Total Chlorine Online Analyzer
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.
