Monitoring Plan for Drinking Water Terminal Quality (Secondary Water Supply)-RJ(SZ)Technology Co., Ltd.

Monitoring Plan for Drinking Water Terminal Quality (Secondary Water Supply)

Release date:2025-09-22

According to the requirements of the "Sanitary Standards for Drinking Water" for export water quality monitoring instruments, the company's pipeline water quality analysis system can measure turbidity, residual chlorine/chlorine dioxide, pH, EC, and temperature. It uses RS485 digital interface, TCP/IP, and GPRS/4G for wireless transmission. The ultra-low turbidity analyzer in this analysis system is equipped with a bubble removal device to ensure the accuracy of turbidity measurement; The residual chlorine measurement adopts a three electrode constant voltage residual chlorine electrode, which can achieve residual chlorine measurement of 0-20mg/L. There is no need to add electrolyte inside the electrode, and the maintenance workload is small. The pH value is detected by the glass electrode method; Detecting electrical conductivity in water using graphite two/four electrode method; The whole machine has the characteristics of small size, low maintenance, and low usage cost, making it suitable for situations with tight space.

3.1 Integration Plan
Based on the on-site conditions of the water supply network, our company will integrate drinking water quality monitoring products and develop a compact multi parameter water quality analysis system that can monitor turbidity, residual chlorine/chlorine dioxide in real time pH、 The five parameters of conductivity and temperature meet the requirements for routine measurement of drinking water.

System Features
All measurement, display, and transmission modules of the instrument are integrated into one box, with a volume of 250 * 400 * 550mm, occupying small space and easy installation;

Ø Electrode analyzer, the detection process does not require reagents, does not produce secondary pollution, and has a small maintenance workload;

Intelligent self diagnosis, with fault alarm functions such as water shortage and sensor device abnormalities;

Equipped with RS485 output and optional wireless network transmission;

Multi level permission management ensures data security;

Ø 7-inch industrial grade touch screen, making viewing and operation more convenient;

3.2 Technical Parameters

parameter		Technical Specifications
parameter		Technical Specifications
measurement parameters		pH， Turbidity, residual chlorine, EC/TDS、 temperature
principle		Residual chlorine: electrode method PH: Glass electrode Turbidity: 90 ° light scattering method EC: Graphite 2 electrodes/4 electrodes (optional) Temperature: NTC
Technical Specifications	range	Residual chlorine/chlorine dioxide: 0.0~5 (20) mg/L Turbidity: 0-20NTU pH：0- 14 Conductivity: 0~5000 us/cm Temperature: 0-75 ℃
	unit	Residual chlorine: mg/L pH：pH Turbidity: NTU Conductivity/TDS: us/cm/mg/l Temperature: ℃
	accuracy	Turbidity: ± 2% or ± 0.02NTU, whichever is higher in absolute value Residual chlorine: ± 0.02 mg/L (when the standard method detection value of actual water samples is ≤ 0.1 mg/L), measurement lower limit of 0.02 mg/l,<10% (when the standard method detection value of actual water samples is>0.1 mg/L) Conductivity/TDS: ± 1% pH： ± 0.1PH Temperature: ± 0.2 º C;
	response time	Less than 90 seconds (residual chlorine<2.5 minutes)
	Measurement Interval	Continuous and periodic
	waterproof rating	IP65
	display screen	7-inch touch color screen
	Overall dimensions	Width: 25m Height: 55cm Thickness: 40cm
input/output	serial port output	RS485,
	communication protocol	Modbus
	GPRS	optional
wash	Cleaning of residual chlorine electrode	Manually wipe the platinum ring electrode regularly
	Cleaning of residual chlorine electrode	Pneumatic flushing requires a compressor (optional)
	Turbidity cleaning	Manual regular flushing
	Turbidity cleaning	Automatic sediment discharge (optional)
Installation requirements	Installation location	indoor
	auxiliary project	220V power supply Sampling point within 5 meters
	sample temperature	5-40℃
	Sample flow rate	0.5~1.2L/min
	humidity	<90%

3.3 Installation and Use
Recommended for installation on indoor walls, the product is powered by 220VAC during use and requires continuous flow of water samples for measurement; Due to the fact that the electrode requires 12 hours of hydration (placed in a continuously flowing water body) before use, it is suitable for continuous use in tap water pipelines. This product does not require reagent replacement and requires minimal on-site maintenance. Therefore, handheld instruments need to be used for calibration during initial use to achieve high measurement accuracy;

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