Analog Type PH And ORP Controller

Analog Type Dule Channels PH And ORP Controller With Historical Data Record For Swimming Pool

The dual-channel analog pH and ORP controller is an intelligent analytical control device widely used in water treatment, chemical, food, electroplating and other industries. It can receive two signals at the same time (for example, one group is pH and one group is ORP) for independent or linkage control.

• Save space and cost: integrate pH and ORP functions in one controller to reduce the number of devices.
• Dual-channel independent control: can monitor and control two chemical parameters separately to improve control accuracy.
• Enhance system flexibility: easy to flexibly set according to different control requirements in complex processes.
• Adapt to the trend of multi-parameter linkage control in modern industry: support data recording and remote management

Product Parameters

​Advantages and features

• Dual-channel input: supports simultaneous connection of two electrodes (pH+pH, ORP+ORP, or pH+ORP)
• Dual-channel relay output: can set high/low alarm, dosing control and other functions
• Analog signal output (4-20mA): docking PLC or DCS system to achieve remote control
• High-definition LCD display Real-time display of pH/ORP, electrode status, temperature, relay status, etc.
• Menu-based operation: easy to operate, supports multiple languages
• History recording function: stores measurement data and alarm records for easy traceability
• Electronic clock: provides timestamp, cooperates with data recording
• Automatic cleaning control: provides cleaning relay output, supports timing or conditional trigger cleaning function
• 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, 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.

Daruifuno PH ORP controller APX2-PD history record and electronic clock function
Built-in real-time clock RTC: can display the current time and support timestamp.

Daruifuno PH ORP controller APX2-PD two-way relay control dosing principle
Each channel can be configured with two relays to achieve the following functions:
Set upper and lower limits: When pH/ORP exceeds the set value, the relay will act.
Control dosing pump:
pH is too high → start acid dosing pump;
pH is too low → start alkali dosing pump;
ORP is too low → start oxidant dosing;
ORP is too high → start reductant dosing.
Delayed start/stop pump function to prevent excessive fluctuations.
Linkage control: Linkage start and stop when both pH and ORP exceed the limit.

Daruifuno PH ORP controller APX2-PD automatic cleaning control principle
The controller can set: fresh time interval, cleaning time
Control method:
The controller outputs cleaning relay signal → drives solenoid valve/water pump/gas cleaning → rinses electrode

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 method
Panel installation (embedded): suitable for instrument box or control cabinet.
Wall installation: fixed to the wall through the back plate.
Pipeline installation: fixed next to the process pipeline using a special bracket.
Electrode access method: supports BNC or threaded connection, the electrode and temperature compensation probe are usually placed in the flow cell or online interface.

​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