Digital pH Meter Online – Panel Mounted Online pH Meter
Uma Industries manufactures and supplies digital online pH meters for
continuous 24×7 pH monitoring in industrial applications such as
ETP/STP plants, water treatment systems, chemical dosing processes,
RO/DM plants, pharmaceutical and food industries.
This panel mounted online pH meter is designed for installation in
industrial control panels and delivers stable, accurate pH measurement
with easy calibration and long service life in harsh operating conditions.
Key Features of Digital Online pH Meter | Digital pH Meter Online
- Panel mounted industrial design for electrical control panels
- Continuous 24×7 online pH monitoring
- 2-point calibration using standard pH 4.00 and pH 7.00 buffers
- Front-panel calibration controls for field adjustment
- Bright 7-segment LED display for clear visibility
- BNC connector compatible with standard pH electrodes
- Heavy-duty PP / ABS enclosure for industrial environments
Key Features of Digital pH Meter Online | Digital pH Meter Online
Uma Industries manufactures and supplies Digital pH Meter Online solutions for
continuous 24×7 pH monitoring in industrial applications such as ETP/STP plants…
Technical Specifications | Digital pH Meter Online
- Measurement Range: 0.00 – 14.00 pH
- Resolution: 0.01 pH
- Calibration: 2-point (pH 4.00 & 7.00)
- Input: pH probe / electrode (BNC)
- Display: 7-segment LED
- Power Supply: 220–230V AC, single phase
- Panel Cut-out: 96 × 96 mm
- Application: Industrial online pH measurement
Working Principle of Online pH Meter | Digital pH Meter Online
pH measurement is based on the activity of hydrogen ions (H⁺) in a solution.
The pH electrode generates a millivolt signal across its glass membrane.
This signal is processed by the digital pH meter and converted into a
stable pH value displayed on the instrument.
- pH < 7 – Acidic solution
- pH = 7 – Neutral solution
- pH > 7 – Alkaline solution
Technical reference:
pH scale |
Nernst equation
Calibration Procedure
- Rinse the pH electrode with distilled (DM) water.
- Immerse the probe in pH 7.00 buffer and adjust until stable.
- Rinse again with DM water.
- Immerse in pH 4.00 buffer and adjust accordingly.
- Repeat once for improved accuracy.
Periodic calibration ensures reliable pH control, reduced chemical consumption
and improved process efficiency.
Industrial Applications
- Effluent Treatment Plants (ETP)
- Sewage Treatment Plants (STP)
- RO / DM water treatment plants
- Chemical dosing & neutralization systems
- Cooling tower and boiler water monitoring
- Food, beverage and pharmaceutical utilities
- Electroplating and surface treatment processes
Related Online pH Meter Models
- Digital Online pH Meter – Panel Mounted
- Online pH Meter with 0–10V DC Output
- Online pH Meter with 4–20mA Output
- Modbus RS-485 Online pH Meter
- Laboratory Table-Top & Portable pH Meter
- pH Sensor / Electrode
Price & Quotation
For price, quotation, bulk orders or dealer enquiries,
please contact Uma Industries.
Share your application details (ETP, STP, RO or process),
and our team will recommend the most suitable model.
Call / WhatsApp:
+91-8178668698
Why Choose Uma Industries for Online pH Meters?
Uma Industries is a trusted Indian manufacturer of digital pH meters and
process instrumentation. Our online pH meters are designed for long-term
industrial use, stable measurement, and easy maintenance. We provide
application guidance, calibration support, spare parts availability and
after-sales service across India.
Frequently Asked Questions
How often should an online pH meter be calibrated?
For clean water applications, calibration every 7–15 days is sufficient.
For ETP, STP and chemical processes, calibration may be required every 3–7 days
depending on contamination levels.
Can this pH meter connect to PLC or SCADA?
Yes. Optional models are available with 4–20mA and
RS-485 Modbus RTU outputs for PLC and SCADA integration.
Digital pH Meter Online – Panel Mounted Online pH Meter
Uma Industries manufactures and supplies Digital pH Meter Online instruments for continuous 24×7 pH monitoring in industrial applications such as ETP/STP plants, water treatment systems, chemical dosing processes, RO/DM plants, pharmaceutical utilities, food industries, electroplating plants, and process control panels.
This panel mounted online pH meter is designed for installation in industrial control panels and provides stable, accurate pH measurement with easy calibration and long service life in harsh operating conditions. It is suitable for users who require reliable online pH indication for water quality control, chemical dosing, neutralization, and industrial process monitoring.
Key Features of Digital pH Meter Online
- Panel mounted industrial design for electrical control panels
- Continuous 24×7 online pH monitoring
- 0.00 to 14.00 pH measurement range
- 2-point calibration using standard pH 4.00 and pH 7.00 buffer solutions
- Front-panel calibration controls for easy field adjustment
- Bright 7-segment LED display for clear visibility
- BNC connector compatible with standard pH electrodes
- Heavy-duty PP / ABS enclosure for industrial environments
- Suitable for ETP, STP, RO, DM plant and chemical dosing applications
Technical Specifications of Digital pH Meter Online
| Product Name | Digital pH Meter Online |
| Measurement Range | 0.00 – 14.00 pH |
| Resolution | 0.01 pH |
| Calibration | 2-point calibration using pH 4.00 and pH 7.00 buffers |
| Input | pH probe / electrode with BNC connector |
| Display | Digital 7-segment LED display |
| Power Supply | 220–230V AC, single phase |
| Mounting Type | Panel mounted |
| Panel Cut-out | 96 × 96 mm |
| Application | Industrial online pH measurement and monitoring |
Working Principle of Online pH Meter
pH measurement is based on the activity of hydrogen ions (H⁺) in a solution. The pH electrode generates a millivolt signal across its glass membrane. This signal is processed by the digital pH meter and converted into a stable pH value displayed on the instrument.
- pH < 7 – Acidic solution
- pH = 7 – Neutral solution
- pH > 7 – Alkaline solution
Technical reference:
pH scale |
Nernst equation
Calibration Procedure for Digital pH Meter Online
- Clean the pH electrode gently with distilled water or DM water.
- Immerse the electrode in pH 7.00 buffer solution.
- Wait for the reading to become stable and adjust the meter to pH 7.00.
- Remove the electrode and rinse again with distilled water.
- Immerse the electrode in pH 4.00 buffer solution.
- Wait for a stable reading and adjust the slope/calibration setting accordingly.
- Repeat the process once for better accuracy if required.
- After calibration, install the electrode back into the process line or sample tank.
Periodic calibration ensures reliable pH monitoring, reduced chemical wastage, better dosing control, and improved process efficiency.
Industrial Applications of Digital pH Meter Online
- Effluent Treatment Plants (ETP)
- Sewage Treatment Plants (STP)
- RO and DM water treatment plants
- Chemical dosing and neutralization systems
- Cooling tower and boiler water monitoring
- Food and beverage processing units
- Pharmaceutical utilities and water systems
- Electroplating and surface treatment processes
- Laboratory and quality control applications
- Industrial process control panels
Benefits of Digital pH Meter Online
- Helps maintain correct pH value in continuous industrial processes
- Improves chemical dosing accuracy and process stability
- Reduces manual testing dependency in water treatment systems
- Provides clear digital indication for operators and maintenance teams
- Suitable for long-term industrial use with easy calibration
- Supports better water quality control in ETP, STP, RO and process plants
Related Online pH Meter Models
- Digital Online pH Meter – Panel Mounted
- Online pH Meter with 0–10V DC Output
- Online pH Meter with 4–20mA Output
- Modbus RS-485 Online pH Meter
- Laboratory Table-Top and Portable pH Meter
- pH Sensor / Electrode
Price and Quotation
For price, quotation, bulk orders or dealer enquiries, please contact Uma Industries. Share your application details such as ETP, STP, RO plant, chemical dosing, laboratory use or industrial process monitoring, and our team will recommend the most suitable pH meter model.
Call / WhatsApp: +91-8178668698
Why Choose Uma Industries for Online pH Meters?
Uma Industries is a trusted Indian manufacturer of digital pH meters and process instrumentation. Our online pH meters are designed for long-term industrial use, stable measurement, easy maintenance, and dependable performance. We provide application guidance, calibration support, spare parts availability, customization support, and after-sales service across India.
Frequently Asked Questions
What is a Digital pH Meter Online?
A Digital pH Meter Online is a panel mounted instrument used for continuous pH monitoring in water treatment, chemical dosing and industrial process applications.
Where is this online pH meter used?
It is commonly used in ETP, STP, RO plants, DM plants, electroplating, chemical processing, food industries, pharmaceutical utilities and control panels.
How often should an online pH meter be calibrated?
For clean water applications, calibration every 7–15 days is usually sufficient. For ETP, STP and chemical processes, calibration may be required every 3–7 days depending on contamination level and process conditions.
Which buffer solutions are used for calibration?
Standard pH 7.00 and pH 4.00 buffer solutions are commonly used for 2-point calibration.
Can this pH meter connect to PLC or SCADA?
This basic model is for online pH indication. Optional models are available with 4–20mA, 0–10V DC and RS-485 Modbus RTU outputs for PLC and SCADA integration.
Which pH electrode is suitable for this meter?
A standard industrial pH electrode with BNC connector can be used. The correct electrode type depends on the application, temperature, chemical nature and installation method.
Does Uma Industries supply pH sensors also?
Yes, Uma Industries supplies compatible pH sensors and electrodes with different cable lengths for online pH meter applications.
Is this pH meter suitable for chemical dosing?
Yes, it is suitable for pH monitoring in chemical dosing and neutralization systems. For automatic dosing control, a pH controller model may be recommended.
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