Online ph controller

Introduction

An online pH controller is an instrument used for continuous, real-time measurement and control of the pH of a liquid in an industrial or treatment process, and it is used for monitoring and controlling the acidity or alkalinity of solutions in water treatment, chemical, food, pharmaceutical, and many other industries. The controller consists of a pH sensor, typically a combination glass electrode with an integrated reference electrode, which is installed in the process stream or a bypass line and generates an electrical potential proportional to the pH of the liquid, and a transmitter or controller that processes the signal, displays the measured value, and provides outputs, such as analog signals, relays, and alarms; the controller can be configured with set points to control dosing pumps, valves, and other devices that add acid, base, or other chemicals to maintain the pH within a desired range. Online pH controllers are used in wastewater treatment for controlling the pH of influent and effluent, for neutralization, and for optimizing biological treatment; in the chemical industry for process control; in the food and beverage industry for quality control and cleaning processes; in the pharmaceutical and biotechnology industries for fermentation and production; in power plants for boiler water and cooling water; in swimming pools and aquariums; in agriculture and hydroponics; and in environmental monitoring, and they are available in various configurations, with features such as automatic temperature compensation, automatic calibration, alarms, data logging, and communication interfaces for integration with control systems. With their continuous measurement and control capability, online pH controllers are essential for maintaining optimal pH conditions in processes and water treatment.

Online pH Controller LOPC-T2010

Online pH Controller features 1 to 3 points pH calibration system, and 4 to 20 mA output signal transmitter. The large and clear back light displays Calibration and setup values, tempera...

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Standards

GB/T 11165-2005-Laboratory pH meter

IEC 60746-1:2003-Expression of performance of electrochemical analyzers-Part 1: General

USP General Chapter <791>-pH

IEC 60746-2:2003-Expression of performance of electrochemical analyzers-Part 2: pH value

Complies with the above standards, but is not limited to them.

Features

1. Online pH controller for continuous monitoring and control of pH in water and processes.

2. Real-time pH measurement with automatic dosing control and alarm functions.

3. Suitable for water treatment, chemical, food, pharmaceutical, power and industrial processes.

4. Includes pH electrode, controller, display, dosing relays and operation manual.

5. Supports neutralization control, process pH regulation and water quality management.

FAQ

Q1: What testing scenarios is this controller mainly applied to?

A: The online pH controller is used in water treatment plants, chemical processing, food and beverage production, pharmaceutical manufacturing, power generation, agriculture, environmental monitoring and industrial facilities to continuously monitor and control the pH of water, process fluids and chemical solutions in real time. It supports wastewater treatment neutralization and pH adjustment, chemical process pH control for reactions and crystallization, food and beverage process pH regulation, pharmaceutical manufacturing pH monitoring, boiler and cooling water treatment, agricultural irrigation and hydroponic nutrient management, and industrial process fluid pH control. The continuous measurement enables automatic acid/base dosing control, alarm notification and data logging for process optimization and regulatory compliance. It is essential for water treatment, chemical, food, pharmaceutical, power and industrial facilities requiring continuous pH monitoring and control for process optimization, product quality, regulatory compliance, equipment protection and environmental discharge compliance, where pH is a fundamental parameter affecting chemical reactions, product quality, corrosion rates, biological treatment efficiency and environmental impact in industrial and municipal water and process systems.

Q2: What standards does the controller comply with?

A: The online pH controller supports methods referenced in ISO 10523 for pH measurement, ASTM D1293, relevant GB/T standards including GB/T 6904 for boiler water, and applicable pharmacopoeial requirements. The hardware complies with applicable industrial safety and electromagnetic compatibility standards. Calibration should use certified pH buffer solutions traceable to international standards.

Q3: What is the warranty period for the whole machine and key components?

A: The whole controller including pH electrode is covered by a 12-month warranty. The electronics, display, relays and controller are covered, while pH electrodes, cables, buffers and fuses are consumables or accessories. Damage from improper installation, corrosive fluids beyond rating or unauthorized repair is excluded. Extended service contracts are available.

Q4: Is this device difficult to operate? Is professional training required?

A: Operation requires trained personnel familiar with pH measurement, electrode maintenance and process control. We provide operation manuals, training and application support. Proper electrode installation, calibration, dosing control setup and maintenance are important for accurate, reliable pH monitoring and control.

Q5: What is the typical lead-time for order delivery?

A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.

Q6: Is regular calibration required? What is the recommended calibration cycle?

A: Calibration with certified pH buffers (typically pH 4, 7, 10) recommended every 1-4 weeks depending on application and electrode condition. Electrode cleaning and storage per manufacturer schedule based on process fluid. Routine verification with a portable pH meter. Electrode replacement when response slows or calibration fails. Full system performance check annually.

Q7: Are supporting consumables universal?

A: pH electrodes, calibration buffers, storage solutions and cables are available from multiple suppliers, though instrument compatibility should be verified. Long-term consumable and maintenance cost is moderate depending on process fluid corrosiveness and electrode fouling.

Q8: Can I customize parameters or supporting accessories?

A: Customization includes pH range, electrode type (glass, ISFET, specialty), temperature compensation, dosing relays, communication protocol and enclosure rating. Additional electrodes, cables and accessories can be ordered separately. Custom orders extend delivery lead-time.

Q9: Does the purchase include on-site installation and commissioning service?

A: Standard delivery includes the controller, pH electrode and accessories with an operation manual. On-site installation, calibration and training are not included for standard orders but can be arranged for industrial process setup. Remote guidance is provided.

Q10: What types of fluids are compatible with this equipment?

A: The online pH controller monitors pH of water, process fluids and chemical solutions within the pH range, temperature rating and electrode material compatibility. Highly corrosive, high-temperature or fouling fluids may require special electrodes or protective housings. Very pure water (low conductivity) requires special pH electrodes and proper flow. Users should select appropriate electrode type for the application, install the electrode in a representative location with proper flow, calibrate regularly with certified buffers, maintain and clean the electrode per manufacturer schedule, store electrodes properly when not in use, set appropriate dosing control parameters to prevent overshoot, and ensure proper temperature compensation for accurate pH measurement. For wastewater neutralization, proper mixing and dosing control design are essential for stable pH control.