APS11 Industrial Glass pH Electrode for Water, Wastewater and Process Measurement
The APS11 Industrial Glass pH Electrode is designed for continuous pH monitoring in drinking water, municipal wastewater, industrial wastewater, chemical dosing systems, and industrial processes.
Featuring a standard PG13.5 process connection, it supports multiple insertion lengths, temperature compensation elements, and cable connector options for a wide range of water treatment monitoring and control applications.
- Full-range measurement from 0~14 pH
- Operating temperature from 0~100°C
- Double liquid-junction reference systemfor high contamination resistance and high-temperature operation
- Robust sensing membrane with high mechanical impact resistance
- Chemically resistant to solvents, strong acids, and strong alkalis
- Standard PG13.5 mounting thread
- Multiple insertion lengths from 120~425 mm
- Multiple connector and cable configurations
Product Description
The APS11 Industrial pH Electrode is engineered for continuous pH monitoring in drinking water systems, municipal sewage treatment, industrial wastewater treatment, chemical dosing processes, and environmental engineering projects.
It features a cylindrical, acid- and alkali-resistant glass membrane approximately 0.2~0.4 mm thick, providing a large sensing area and improved mechanical impact resistance compared with conventional spherical glass bulbs. The integrated Ag / AgCl / KCl reference system uses pressure-resistant GFT polymer gel electrolyte, while the double-junction design helps protect the reference system from process contamination and reduces the risk of reference poisoning in wastewater and chemically complex media.
With stable measurement performance, chemical and pressure resistance, and flexible installation dimensions, the APS11 is suitable for a wide range of industrial water treatment and process control applications.
Technical Specifications
|
Parameter |
Specification |
|---|---|
|
Measurement range |
0~14 pH |
|
Operating temperature |
0~100°C |
|
Continuous operating pressure |
0~3 bar |
|
Factory slope |
>95% of theoretical Nernst slope |
|
Zero point |
pH 7.00 ±0.25 |
|
Response time |
<30 seconds under specified test conditions |
|
Glass membrane resistance |
<250 MΩ under specified test conditions |
|
Reference system |
Ag / AgCl / KCl |
|
Reference electrolyte |
Pressure-resistant GFT polymer gel |
|
Reference junction |
Double junction |
|
Process connection |
PG13.5 |
|
Electrode body |
Glass |
|
Protection rating |
IP68 for applicable sealed configurations |
Sensor Construction
|
Component |
Specification |
|---|---|
|
pH-sensitive membrane |
Acid- and alkali-resistant cylindrical glass membrane |
|
Membrane thickness |
Approximately 0.2～0.4 mm |
|
Standard liquid junction |
Porous ceramic junction |
|
Optional junction designs |
Two-point ceramic, three-point ceramic, or annular porous PTFE junction |
|
Reference construction |
Integrated Ag/AgCl/KCl double-junction system |
|
Insertion length |
120, 150, 225, 325, or 425 mm |
|
Temperature compensation |
NTC 10K, NTC 2.252K, NTC 22K, Pt100, or Pt1000 |
|
Connector type |
S8, S8M, S7, VP, K8S, or K2 |
|
Cable length |
Customizable up to 60 m |
|
Junction configuration |
Single-point, two-point, three-point ceramic, or annular PTFE junction |
Key Features
|
Design Feature |
Engineering Benefit |
|---|---|
|
Acid- and alkali-resistant cylindrical glass membrane |
Provides a large sensing area and improved resistance to mechanical impact for continuous industrial pH measurement |
|
Double-junction reference system |
Adds an additional barrier between the process medium and internal reference system, helping reduce contamination and reference poisoning |
|
Pressure-resistant GFT polymer gel electrolyte |
Provides a sealed, maintenance-free reference system suitable for pressurized process installations |
|
PG13.5 industrial process connection |
Supports installation in standard holders, immersion assemblies, flow cells, and retractable housings |
|
Multiple insertion lengths and junction options |
Allows the electrode to be configured for different tanks, pipelines, sensor holders, and fouling conditions |
|
Multiple temperature elements and connector options |
Supports integration with a wide range of industrial pH transmitters, controllers, and OEM systems |
Typical Applications
The APS11 Industrial pH Electrode is designed for continuous pH monitoring in:
- Municipal water and wastewater treatment
- Industrial wastewater and discharge monitoring
- Neutralization and acid/alkali dosing systems
- Biological treatment and sludge processes
- Coagulation, filtration, and recirculating water systems
- Food and beverage, textile, metal processing, electroplating, and pulp and paper effluent
- Packaged water treatment equipment and environmental monitoring projects
The double-junction reference system provides additional protection against process contamination and helps reduce the risk of reference poisoning in complex wastewater media.
For concentrated chemicals, organic solvents, strong oxidizers, high-sodium solutions, low-conductivity water, or combined high-temperature and high-pressure conditions, application compatibility should be confirmed before selection.
Wastewater pH Monitoring
pH Measurement in Treatment Tank
Immersion pH Sensor Installation
FAQ
The HA glass membrane is designed for improved resistance to acidic and alkaline media across a 0~14 pH measurement range. However, suitability depends on chemical concentration, temperature, pressure, sodium content and the complete process composition.
Hydrofluoric acid and other chemicals that attack glass are not suitable for standard glass pH electrodes.
The specified continuous pressure range is up to 3 bar. The 6 bar value is the maximum pressure limit, not necessarily the recommended continuous operating pressure.
Pressure capability must be reviewed together with process temperature, mounting assembly and electrode configuration.
The PG13.5 thread is widely used for industrial pH electrodes, but mechanical thread compatibility alone is not sufficient.
The following items must also match:
- Electrode length
- Insertion depth
- Connector type
- Temperature sensor type
- Cable configuration
- Transmitter input
- Process pressure
- Chemical compatibility
The temperature element must match the input specification of the pH transmitter. Common options include NTC 10K, NTC 2.252K, NTC 22K, Pt100 and Pt1000.
Using the wrong element can produce incorrect temperature readings and inaccurate temperature compensation.
Calibration frequency depends on contamination, temperature, chemical exposure and the accuracy required by the process.
The correct interval should be established by recording calibration drift over time. Contaminated wastewater applications usually require more frequent calibration than clean-water applications.
Cable lengths up to 60 metres are available. Long pH signal cables require correct shielding, dry connectors and suitable high-impedance transmitter inputs.
For electrically noisy sites, a local preamplifier or transmitter may provide better measurement stability than a very long direct electrode cable.
Yes. Multiple insertion lengths, connector types, temperature sensors, cable lengths and junction configurations are available for OEM, replacement and project requirements.
Factory Strength & Quality Assurance
ARTang supports industrial measurement projects with in-house production, strict calibration, certified quality control, and global exhibition experience.
Factory Production
In-house production and assembly for stable product quality and reliable delivery.
CNC Machining Equipment
Product Assembly
CNC Machining
Welding Process
warehouse
Technical Support Department
Certified Quality
Product certificates and quality control systems support reliable industrial measurement applications.
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Exhibition Experience
ARTang meets customers and distributors at industry exhibitions to better understand project needs and market requirements.
