Membrane Method Digital RS485 4-20mA Residual Chlorine Sensor
>>Overview
Residual chlorine refers to chlorine existing in the forms of
hypochlorous acid, hypochlorite ions, and dissolved elemental
chlorine. After chlorine is introduced into water, a portion of the
chlorine is consumed through reactions with bacteria,
microorganisms, organic matter, and inorganic substances in the
water, while the remaining portion is called residual chlorine,
also known as free chlorine. Currently, chlorine-containing
disinfectants are widely used in public spaces and households for
disinfection. On one hand, sufficient disinfectant concentration
must be maintained to ensure effective sterilization; on the other
hand, elevated residual chlorine levels in wastewater discharged to
urban sewage treatment plants may adversely affect normal operation
of biological treatment units. Additionally, excessive residual
chlorine could impact surface water, groundwater, and drinking
water sources, potentially affecting ecological environments and
potable water supplies. Measuring residual chlorine content and its
forms in water to maintain appropriate levels is crucial for
ensuring disinfection efficacy, environmental water quality, and
drinking water safety.
The AG5863DA1 residual chlorine sensor employs a thin-film coated
dual-electrode system, suitable for conventional water quality
conditions with stable pH and free from surfactants. Application
industries: Tap water, drinking water, mineral water, service
water, and process water. The electrode outputs standard signals
(4-20mA/RS485/0~±2V) that can be directly connected to secondary
instruments, PLCs, RTUs, and other intelligent terminal devices.
>>Feature
▪ Utilizes a membrane method to accelerate response time and ensure
stable signals.
▪ The electrode casing is constructed with POM and 316 stainless
steel, capable of withstanding temperatures ranging from 0 to 45°C.
▪ The leads are made of pure copper, enabling direct remote
transmission. Compared to copper-zinc alloy leads, they deliver
more accurate and stable signal performance.
>>Technical Parameter
Measurement Variable: Free Chlorine (pH-dependent)
Calibration Method: Zero-point drift-free; single-point slope
calibration based on chemical method
pH Range: 6.0-8.0
Operating Temperature: 0-45℃
Maximum Pressure: 1.0 bar
Flow Rate: 15-30 L/h (in flow cell)
Response Time: Initial polarization time: ~1 hour; T90 response
time = 30 seconds
Drift: ≤ -1% per month in drinking water at 25℃, pH 7.2
Power Supply: 9-36 VDC
Output Signal: Two-wire 4-20 mA; RS485; 0~±2 V; built-in
temperature compensation
Maintenance Cycle: Membrane cap lifespan: 1 year; electrolyte
replacement interval: 3-6 months
