JW-iPH-306(K29)online pH sensor is designed for continuous pH measurement in environmental water monitoring, acid and alkaline solutions, salt solutions, chemical reactions, and industrial production processes. With RS485 Modbus RTU output, automatic temperature compensation, IP68 protection, and 1/2 NPT installation, it can be easily integrated with PLCs, DCS systems, industrial controllers, paperless recorders, touch screens, and IoT water quality monitoring platforms.
2. Product Overview
JW-iPH-306(K29)online pH sensor is a digital pH probe designed for continuous water quality and process pH monitoring. It uses a glass electrode measurement method and provides digital RS485 Modbus RTU output, making it suitable for connection to industrial automation and online monitoring systems.
The sensor is suitable for environmental water quality monitoring, acid and alkaline solutions, salt solutions, chemical reaction processes, and industrial production processes. Its 1/2 NPT threaded structure enables flexible installation in tanks, pipelines, and submerged monitoring points. The IP68 waterproof design supports long term field deployment in humid and water-contact environments.
Item
Specification
Product Type
Online pH Sensor
Measurement Principle
Glass Electrode Method
Measuring Range
0–14.00 pH
Resolution
0.01 pH
Accuracy
±0.1 pH ±0.3°C
Response Time
T90 less than 30 s
Minimum Detection Limit
0.1 pH
Calibration Method
Two Point Calibration
Temperature Compensation
Automatic PT1000
Output Signal
RS485 Modbus RTU
Power Supply
12–24V DC
Power Consumption
0.1W at 12V
Working Conditions
0–50°C ≤0.2 MPa
Storage Temperature
-5–65°C
Installation Method
Submersible 1/2 NPT
Protection Rating
IP68
Housing Material
POM
Cable Length
5 m standard customizable
3. Application Scenarios
Environmental Water Quality Monitoring: Used for online pH monitoring in rivers, lakes, reservoirs, surface water stations, and environmental water quality systems.
Industrial Process pH Control: Suitable for chemical production, industrial process water, acid and alkaline solution monitoring, and reaction process control.
Wastewater Treatment: Can be used in wastewater treatment plants, neutralization tanks, and industrial effluent monitoring systems.
Pipeline and Tank Installation: The 1/2 NPT threaded interface supports installation in pipes, tanks, flow cells, and submerged monitoring points.
Smart Water Quality Monitoring Systems: The RS485 Modbus RTU protocol allows easy integration with PLCs, DCS, data acquisition units, wireless telemetry devices, and cloud based IoT monitoring platforms.
4. Installation Notes
The pH sensor should not be installed upside down or horizontally. It should be installed at an angle of at least 15 degrees to ensure reliable electrode performance. The 1/2 NPT thread supports side-wall installation, top-mounted insertion, flow-through installation, pipeline installation, and submersible installation.
For long term operation in water, seawater, wastewater, or humid outdoor environments, all wiring joints should be waterproofed, and the user-side cable should have corrosion-resistant protection. Before power-on, check the wiring sequence carefully to avoid damage caused by incorrect wiring.
5. Maintenance Notes
Before measurement, rinse the sensor with distilled or deionized water and dry it with filter paper to avoid contaminating the sample. During measurement, approximately one third of the sensor should be inserted into the solution.
When the sensor is not in use, clean it and store it in a protective cap filled with 3 mol/L potassium chloride solution. Do not keep the sensor soaked in distilled water or protein solution for a long time, and avoid contact with silicone oil or grease. If deposits appear on the glass membrane after long term use, clean it with dilute hydrochloric acid and rinse with water.
FAQ
Q
1. What is this online pH sensor used for?
A
It is used for continuous pH monitoring in environmental water, acid and alkaline solutions, salt solutions, chemical reactions, wastewater treatment, and industrial production processes.
Q
2. What is the measuring range of the pH sensor?
A
The sensor measures from 0 to 14.00 pH with 0.01 pH resolution.
Q
3. What communication protocol does the sensor support?
A
The sensor supports RS485 output with Modbus RTU protocol for connection to PLCs, DCS systems, controllers, recorders, touch screens, and IoT platforms.
Q
4. Can JW-IoT provide this pH sensor for industrial water monitoring projects?
A
Yes. JW-IoT can supply online pH sensors for wastewater treatment, chemical process monitoring, surface water monitoring, and smart water quality systems.
Q
5. Does the sensor support automatic temperature compensation?
A
Yes. It includes automatic temperature compensation with a built in PT1000 temperature element.
Q
6. How should the sensor be installed?
A
The sensor should not be installed upside down or horizontally. It should be installed at an angle of at least 15 degrees.
Q
7. Can JW-IoT integrate this pH probe with a cloud monitoring platform?
A
Yes. JW-IoT can integrate the sensor with data acquisition units, wireless telemetry, solar power systems, and cloud based water quality monitoring platforms.
Q
8. How should the pH sensor be stored when not in use?
A
It should be cleaned and stored in a protective cap or container filled with 3 mol/L potassium chloride solution.
Q
9. What should be avoided during long term use?
A
Avoid long term soaking in distilled water or protein solution, avoid silicone oil or grease contact, and ensure wiring joints remain waterproof and corrosion resistant.
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