Online pH ORP Controller Price in Pakistan | Digital Controller
The Online pH ORP Controller is a digital water-quality monitoring and control instrument designed for continuous measurement of pH and ORP (Oxidation-Reduction Potential) in water-treatment and industrial processes.
It can be integrated with chemical dosing pumps, RO plants, ETP/STP systems, industrial water-treatment plants and chemical-treatment systems to monitor water quality and provide control signals when the measured value reaches the programmed setpoint.
The pH measurement range is typically 0–14 pH, while ORP measurement can cover approximately -1000 to +1000 mV or a wider range depending on the controller configuration.
Online pH ORP Controller for Water Treatment
The Online pH ORP Controller provides continuous monitoring of water chemistry and can be used to control treatment processes based on measured pH or ORP values.
Unlike a handheld meter that requires manual testing, an online controller is installed directly into a treatment system and continuously receives measurements from a suitable pH or ORP electrode.
The controller can then activate a connected dosing or control system when the measured value reaches a programmed high or low setpoint.
This makes the online pH ORP controller particularly useful for automated chemical dosing and water-treatment applications.
What Does pH Measure?
pH indicates whether water is acidic, neutral or alkaline.
The normal pH scale ranges from:
0 → 7 → 14
- Below 7 = Acidic
- 7 = Neutral
- Above 7 = Alkaline
The controller can continuously monitor pH and, when connected to a dosing system, help maintain the required pH range.
What Does ORP Measure?
ORP (Oxidation-Reduction Potential) measures the oxidation or reduction tendency of a water solution and is generally expressed in millivolts (mV).
ORP monitoring is useful in processes involving oxidation and reduction reactions, including selected disinfection and chemical-treatment applications.
How Does an Online pH ORP Controller Work?
A suitable pH or ORP electrode is installed in the water or sample line.
The electrode sends a signal to the controller.
The controller displays the measured value and compares it with the programmed setpoint.
When control outputs are configured, the controller can operate a connected dosing pump or other equipment.
Typical System
pH / ORP Electrode
↓
Online pH ORP Controller
↓
Relay / Control Output
↓
Chemical Dosing Pump
↓
Water Treatment System
This arrangement can help automate chemical dosing and reduce the need for continuous manual adjustment.
Technical Specifications
| Specification | Details |
|---|---|
| Product | Online pH ORP Controller |
| pH Range | 0–14 pH* |
| pH Resolution | Up to 0.01 pH* |
| ORP Range | Approximately -1000 to +1000 mV* |
| ORP Resolution | Up to 1 mV* |
| Display | Digital / LCD |
| Control | ON/OFF control |
| Setpoints | High / Low |
| Relay Output | According to controller configuration |
| Analog Output | 4–20 mA optional/depending on configuration |
| Power Supply | 220 VAC / 50 Hz* |
| Installation | Panel / wall mounted depending on model |
| Application | Water Treatment & Process Control |
| Electrode | pH / ORP electrode according to configuration |
*Specifications can vary according to the exact controller model and supplied configuration. Confirm the final datasheet before publishing model-specific specifications.
A current Pakistan listing for a pH/ORP controller shows 0–14 pH, 1 mV to -1000/+1000 mV, 0.01 pH resolution, LCD display, ON/OFF control and 220 VAC operation. More advanced controllers can offer wider ORP ranges, 4–20 mA outputs and communication interfaces.
Key Features
- Online continuous pH monitoring
- ORP monitoring capability
- Digital display
- pH range up to 0–14
- ORP measurement in mV
- High and low setpoint control
- Relay control for dosing applications
- Optional 4–20 mA output on supported configurations
- Suitable for automatic chemical dosing
- Compact industrial design
- Suitable for water-treatment applications
- Can be integrated with dosing pumps
- Suitable for commercial and industrial processes
Applications
RO Plants
The controller can be used for monitoring pH in suitable RO pretreatment or chemical-dosing processes.
ETP & STP Plants
Suitable for monitoring pH and ORP in wastewater-treatment and neutralization processes.
Chemical Dosing Systems
Can be connected to a chemical dosing pump to provide automated control based on the measured parameter.
Industrial Water Treatment
Suitable for process-water monitoring and chemical-treatment applications.
Disinfection Systems
ORP monitoring can be useful in selected oxidation and disinfection processes where ORP is an appropriate control parameter.
Cooling Water Treatment
Suitable for selected cooling-water treatment processes requiring continuous pH or ORP monitoring.
Industrial Process Control
Can be integrated into industrial systems where continuous pH/ORP measurement is required.
Benefits
Continuous Monitoring
The online controller continuously monitors the connected pH or ORP electrode instead of requiring repeated manual testing.
Automatic Dosing Control
When properly configured with a dosing pump, the controller can help automate chemical dosing based on programmed setpoints.
Better Process Control
Continuous measurement can help operators maintain the desired treatment range.
Reduced Manual Monitoring
Automated measurement reduces the need for frequent manual pH testing.
High & Low Setpoints
High and low control limits can be programmed according to the treatment process.
4–20 mA Integration
Models equipped with isolated 4–20 mA output can be integrated into suitable industrial control systems.
pH ORP Controller with Dosing Pump
The controller can be used together with a chemical dosing pump.
For example:
pH Electrode → pH Controller → Relay Output → Dosing Pump → Chemical Injection
The controller measures the pH continuously and can activate the dosing pump when the measured value moves outside the programmed control range.
The actual control logic should be configured according to the chemical being dosed and the treatment process.
pH ORP Electrode
The performance of an online controller depends significantly on the correct selection and installation of the electrode.
The electrode should be selected according to:
- Water chemistry
- Temperature
- Pressure
- Installation method
- Chemical exposure
- Required measurement range
- Process connection
For industrial installations, the appropriate electrode should be confirmed before ordering.
Installation
The controller can be installed in a suitable panel or protected location depending on the selected model.
A typical installation includes:
Water/Sample Line
↓
pH or ORP Electrode
↓
Controller
↓
Dosing Pump / Control Equipment
The electrode should be installed where representative water reaches the sensor and where the installation allows convenient calibration and maintenance.
Calibration & Maintenance
Regular calibration is important for accurate pH measurement.
Recommended maintenance includes:
- Regular pH calibration
- ORP verification where applicable
- Electrode cleaning
- Inspection of electrode cable
- Checking electrical connections
- Checking relay operation
- Inspecting dosing-pump connections
- Replacing electrodes when required
- Protecting the controller from water and excessive humidity
Calibration frequency depends on the water quality and application.
Online pH ORP Controller Price in Pakistan
The Online pH ORP Controller Price in Pakistan varies according to the controller’s measurement range, number of channels, outputs, electrode type, communication features and industrial specification.
Frequently Asked Questions
What is an online pH ORP controller?
An online pH ORP controller is a digital instrument that continuously measures pH and/or ORP through a connected electrode and can provide control signals for treatment equipment.
What is the pH range?
A typical controller provides a 0–14 pH measurement range, although the exact specification depends on the model.
What is the ORP range?
The ORP range depends on the controller. A typical configuration can measure approximately -1000 to +1000 mV, while some advanced controllers support a wider range.
Can it control a dosing pump?
Yes. A controller with suitable relay/control outputs can be integrated with a chemical dosing pump for automated process control.
Where is an online pH ORP controller used?
It can be used in RO plants, ETP/STP systems, industrial water treatment, chemical dosing systems, cooling-water treatment and other process-control applications.
What is the price of an online pH ORP controller in Pakistan?
A standard controller can be listed at approximately PKR 39,500, while the final price depends on the exact configuration and accessories.
Does the controller come with a pH electrode?
This depends on the selected configuration. Confirm the electrode package before ordering.
Why Choose Hydrous Water Technology?
Hydrous Water Technology SMC Pvt Ltd supplies water-treatment equipment and process-control products for commercial and industrial applications.
We provide solutions for:
- RO Plants
- Industrial RO Plants
- Commercial Water Treatment
- ETP/STP
- Chemical Dosing Systems
- Mineral Water Plants
- Water Filtration Systems
- Industrial Water Treatment
