Product introduction

Water quality monitoring is an important part of environmental protection and water treatment. In recent years, the country has become more and more strict about environmental protection, and the demand for online water quality monitoring equipment is also increasing. Whether it is a sewage treatment plant, a water plant, or the drainage outlet of an industrial enterprise, online water quality monitoring equipment needs to be installed.

I have been involved in many projects with Doweston's water quality analyzers. They have been in the water treatment industry for many years and have a relatively complete product line, covering everything from simple pH meters and dissolved oxygen meters to complex multi-parameter water quality monitoring systems. The most important thing is that the product is stable and durable, and the after-sales service is up to date.

Product type

Doweston's water quality monitoring products are mainly divided into the following categories:

Multi-parameter water quality monitor: Can measure multiple water quality parameters at the same time, such as pH, dissolved oxygen, turbidity, conductivity, temperature, etc. One meter can be used for several.

PH/ORP meter: Specially designed to measure the pH and redox potential of water, which are the most basic parameters for water quality monitoring.

Dissolved oxygen meter: Measuring the dissolved oxygen content in water is important for water treatment and environmental monitoring.

Turbidimeter: Measuring the turbidity of water is an important indicator for judging the quality of water.

Conductivity meter: Measure the conductivity of water and indirectly reflect the ion content in water.

Residual chlorine analyzer: Measuring the residual chlorine content in water, mainly used for water treatment in water plants and swimming pools.

Sludge concentration meter: Measures sludge concentration and is used in the sludge treatment process of sewage treatment plants.

 Core product introduction

Multi-parameter water quality monitor

This is Doweston's flagship product, which can connect multiple sensors at the same time, measure multiple parameters, display all data through one display, and output standard signals to the control system.

The advantages of this multi-parameter design are: first, it can save installation space, and one set of equipment can be used by several single-parameter equipment; second, it is easy to manage, as only one host is maintained; finally, it is more advantageous in terms of cost.

I worked on a sewage treatment plant project and used Doweston's multi-parameter water quality monitor to monitor the quality of the incoming and outgoing water. Parameters such as pH, dissolved oxygen, turbidity, and temperature can be measured simultaneously, and the data is uploaded to the central control room in real time, providing an important basis for process adjustment.

 PH meter

PH value is one of the most basic parameters of water quality. Doweston's pH meter uses high-quality glass electrodes, which ensures accurate measurement and fast response. There are two types: online and portable, which can meet the needs of different occasions.

The water purification process of a water plant needs to control the pH value within an appropriate range to ensure disinfection effect and stable water quality. They used Doweston's online pH meter, combined with the dosing system, to achieve automatic control of pH value and greatly improve the stability of water quality.

Dissolved oxygen meter

Dissolved oxygen is an important indicator of the self-purification ability of water. In the aerobic process of sewage treatment, the dissolved oxygen concentration directly affects the treatment effect.

The aerobic tank of a certain sewage treatment plant needs to maintain a certain dissolved oxygen concentration to ensure the activity of microorganisms. They used Doweston's dissolved oxygen meter to monitor the dissolved oxygen concentration and fed the signal back to the blower control system, realizing automatic control of dissolved oxygen and greatly reducing energy consumption.

Application scenarios

Sewage treatment plant

Wastewater treatment plants are the largest users of water quality monitoring equipment. From water inlet to water outlet, each treatment unit needs to monitor water quality parameters.

The first phase of a municipal sewage treatment plant has a daily treatment capacity of 100,000 tons. They installed a pH meter, turbidity meter, and conductivity meter at the water inlet, a dissolved oxygen meter, and a sludge concentration meter in the aerobic tank, and a pH meter, dissolved oxygen meter, turbidity meter, and residual chlorine analyzer at the water outlet, forming a complete water quality monitoring system. These data are not only used for process control, but also uploaded to the monitoring platform of the environmental protection department in real time to meet regulatory requirements.

Water plant

Water plants need to conduct strict water quality monitoring of raw water and factory water to ensure the safety of water supply.

The factory water monitoring system of a water plant is equipped with Doweston's multi-parameter water quality monitor, which can simultaneously monitor parameters such as pH, turbidity, residual chlorine, and temperature. Data is displayed in the duty room in real time and reports are automatically generated, greatly improving work efficiency.

 River and lake monitoring

Environmental protection departments are paying more and more attention to the monitoring of surface water quality, and have built automatic water quality monitoring stations in important rivers, lakes, and reservoirs.

The automatic water quality monitoring station of a provincial environmental protection department uses Doweston's water quality monitoring equipment, which can monitor parameters such as pH, dissolved oxygen, turbidity, permanganate index, and ammonia nitrogen in real time. The data is uploaded to the provincial monitoring center in real time via wireless network, providing an important basis for environmental management.

Industrial circulating water

Circulating cooling water systems in industrial enterprises need to monitor water quality to prevent scaling and corrosion.

The circulating water system of a chemical plant is equipped with Doveston's conductivity meter and pH meter, which can monitor changes in water quality in real time. When the water quality exceeds the standard, the system will automatically alarm and start the dosing device for adjustment, effectively preventing equipment corrosion and scaling.

Key points for selection

Things to note when choosing water quality monitoring equipment:

monitoring parameters: What parameters need to be monitored? Choose single-parameter or multi-parameter instruments according to actual needs.

measuring range *: What is the measurement range of each parameter? Make sure that the measurement range of the instrument can meet the needs.

medium characteristics: Is the medium corrosive? Does it contain suspended solids? This will affect sensor selection.

Mounting Type: Online or portable? Choose the appropriate installation method according to the use situation.

Output Signal: What type of output signal is required? 4-20mA, RS485 or other?

Maintenance requirements: Different types of sensors have different maintenance requirements, and the subsequent maintenance workload must be considered.

installation Precautions

Installation location: Choose a representative location for installation and avoid installing in dead corners or eddy currents.

Flow-through installation: For pH meters, dissolved oxygen meters, etc., it is best to use flow-through installation to ensure accurate measurement.

periodic calibration: Water quality sensors need to be calibrated regularly to ensure accurate measurements.

Regular maintenance: Sensors need to be cleaned and maintained regularly, especially sensors that measure sewage media.

Protective measures: For outdoor installation, lightning protection, sun protection, anti-freeze and other measures should be considered.

Customer feedback

The person in charge of the operation of a sewage treatment plant said: "Our plant has used Doweston's water quality monitoring equipment for several years, and the quality is quite stable. Although the sensors require regular maintenance, compared with imported brands, the maintenance cost is much lower, and the after-sales service is also very timely."

Summary

Online monitoring of water quality is an important part of the environmental protection and water treatment industries, and equipment selection is very important. Doweston's water quality monitoring products are of stable quality and reasonably priced, making it a leader among domestic brands.

It is recommended that when selecting a model, you should clearly state the monitoring requirements and working conditions, and let the manufacturer help you configure a suitable solution. The later maintenance of water quality monitoring equipment is also very important. It is necessary to choose a supplier with good after-sales service.