Dule Channels Analog PH And ORP Controller With RS485 For Industrial Wastewater Treatment

Daruifuno brand APX2-PD dual-channel controller usually supports simultaneous connection of one analog pH electrode and one analog ORP (oxidation-reduction potential) electrode, or two analog pH sensors and two analog ORP sensors. The pH value and oxidation-reduction potential (mV value) of the solution are collected respectively. The internal analog circuit converts the electrode signal into a standard voltage signal, amplifies and filters it, and then the microprocessor of the controller performs numerical processing and judgment, thereby outputting a relay control signal or an analog current (such as 4-20mA) signal.
pH channel: measures pH (0-14) and controls acid/base dosing.
ORP channel: measures oxidation-reduction potential (±2000mV) for disinfection (such as chlorination) or dechlorination.
The electrode is connected to the controller terminal; the controller relay output is connected to the dosing pump, alarm or cleaning device; the control logic, calibration, cleaning cycle, etc. can be set through the menu; regular calibration and data viewing are supported.

Product Parameters

​Advantages and features

• Dual-channel input: supports simultaneous connection of two electrodes (pH+pH, ORP+ORP, or pH+ORP) monitors pH and ORP at the same time, improves efficiency and saves installation space
• Dual-channel relay output: can set high/low alarm, dosing control and other functions
• Analog signal output (4-20mA): provides 4-20mA output, which is convenient for docking with PLC and DCS systems
• High-definition LCD display Real-time display of pH/ORP, electrode status, temperature, relay status, etc.
• History recording function: stores measurement data and alarm records for easy traceability
• Electronic clock: provides timestamp, cooperates with data recording Built-in history record and electronic clock, you can query the time of key events
• Automatic cleaning control: provides cleaning relay output, supports timing or conditional trigger cleaning function to extend electrode life
• Multiple calibration methods: supports 1-point, 2-point or multi-point calibration to improve accuracy
• Two Channels are isolated from each other
• Each channel can be connected to an independent temp. system.
• When pH, ORP and temp. are tested at the same time, the algorithm inside the meter can simultaneously evaluate the disinfection ability and display pH, ORP, temp. and chlorine values.
• Meet pH/ORP monitoring, dosing control, and data signal remote transmission at the same time.
• Menu-based operation Multi-language support, user-friendly interface, simple operation

Daruifuno PH ORP controller APX2-PD history record and electronic clock function1. History recording function
1.Store measurement data, alarm events, etc.
Recording interval can be set (such as every 10 minutes)
2. Electronic clock function
Real-time clock module to ensure accurate event recording time

Daruifuno PH ORP controller APX2-PD two-way relay control dosing principle
Set the pH upper/lower limit. When the set value is exceeded, the relay will be activated.
Example: pH > 9, start the acid dosing pump;
pH < 6, start the alkali dosing pump;
You can set the hysteresis interval to avoid frequent switching.

Daruifuno PH ORP controller APX2-PD automatic cleaning control principle

The cleaning relay can be set to start at a fixed time (such as every 24 hours); the flushing time setting
starts the solenoid valve or water pump to clean the electrode
avoids measurement errors caused by adhesion on the electrode surface.

Daruifuno PH ORP controller APX2-PD pH and ORP calibration method
1. pH calibration:
Use standard buffer: pH 4.01, 7.00, 10.01, PH ORP controller produced by our company Daruifuno, the calibration point can be set freely.
Single point calibration: Use pH 7.00 liquid to calibrate the zero point.
Two-point calibration: pH 7.00 and 4.00 or 10.00, calibrate the zero point and slope.
The controller guides the operation, automatically determines stability and stores.
2. ORP calibration:
Use standard buffer, such as +220mV or +470mV.
The calibration process is simple, usually a single point is sufficient.

Daruifuno PH ORP controller APX2-PD controller installation methodInstallation method:
Panel installation (opening installation, IP66 protection panel)
Wall installation (adaptive protection shell)
Pipeline installation
Installation environment:
Avoid direct sunlight, high temperature and high humidity;
Cables are routed separately to avoid sharing the same wiring trough with power lines;

​Aplication:
◇ Surface water
◇ Source water
◇ Aquaculture waters
◇ Landscape water
◇ Import of the waterworks

◇ Water treatment monitoring

◇ Drinking water,

◇ Groundwater, swimming pool

◇Industrial process monitoring and dosing control management

◇Chemical, petroleum, paper, food and medicine, electroplating, PCB manufacturing, etc.
◇ Municipal/industrial water treatment

◇ Circulating cooling water monitoring

◇ Electroplating/chemical liquid control

◇ Food and beverage production line
◇ Acid-base neutralization reaction tank control

Suzhou Delfino Environmental Technology Co., Ltd. is a professional manufacturer of water analysis instruments and sensors, integrating development and production together. Our main products include online, portable water quality analysis instruments. Since its establishment, we have focused on the development and production of water quality analysis instruments.

The monitoring parameters of water quality analyzer instruments mainly include: pH, ORP, dissolved oxygen, conductivity/TDS/salinity, turbidity, SS, Chlorophyll, Blue-green algae, COD, NH4-N, NO3, free chlorine, peracetic acid and so on.

As the rapid growth of the global economy leads to increased consumption and urbanization, solid waste generation has increased significantly, directly affecting the water and wastewater treatment industry. Daruifuno aims to provide solutions to various industries and fields and create a cleaner and healthier drinking water environment for the earth.

Our products mianly application for follows industry：Municipal sewage water treatment plant, industrial wastewater treatment plant, Chemical, Petroleum, Papermaking, Food and drinking, Medicine, Electroplating, PCB plant, fish farm,Lake/river/ocean/groundwater/surface and so on.

Our company was established in 2015, but our predecessor has been committed to the water quality testing industry for more than 10 years. At present, we have our own R&D center with many senior engineers with more than 10 years of experience in the research and development of water quality analyzers and water quality sensors, and are equipped with strict front-line production workers, professional quality inspection personnel and testing equipment to check every process.

As a high-tech enterprise in China, our production is strictly in accordance with ISO9001 from raw material sources to finished equipment. After years of efforts, the company has obtained more than 20 patent certificates, high-tech enterprise certificates, CE, SGS, etc. He has accumulated rich practical experience in the field of water quality testing and has unique insights in the field of water quality testing.

Our company takes "reasonable prices, efficient production time, and good after-sales service" as its purpose and adheres to the business philosophy of "based on quality and creating value for customers". At present, the company is actively exploring the international market and actively promoting its own brands and products. It has been exported to Asia, Southeast Asia, Europe, Africa, and South America, with customers in more than 50 countries and regions around the world. And hope to develop together with customers for mutual benefit with high-quality products and sincere services.