APS22 Hydrofluoric Acid-Resistant pH Electrode
The ARTang APS22 is designed for online pH measurement in aqueous process liquids containing hydrofluoric acid. The maximum stated hydrofluoric acid concentration is up to 4000 ppm under confirmed process conditions.
The APS22 is suitable for selected semiconductor wastewater, metal-treatment processes, electronics and electroplating wastewater, steel-industry effluent and other diluted HF-containing aqueous streams.
- Measurement range: 0~14 pH
- Maximum stated HF concentration: up to 4000 ppm
- Operating temperature: 0–100°C
- Operating pressure: 0–3 bar
- Standard PG13.5 process connection
- Multiple insertion lengths and connector options
- IP68 for applicable sealed configurations
Product Description
The APS22 uses a specialized HF-resistant glass, an HF-service GFT gel electrolyte, and a double-junction design. Combined with a multi-pore ceramic junction and optional configurations, it offers improved resistance in hydrofluoric acid media while maintaining stable pH measurement performance.
Multiple insertion lengths, temperature elements and electrical connectors are available for new installations, OEM systems and replacement projects.
Technical Specifications
|
Parameter |
Specification |
|---|---|
|
Product model |
APS22 |
|
Product type |
Hydrofluoric acid-resistant industrial pH electrode |
|
Measurement range |
0~14 pH |
|
Maximum stated HF concentration |
Up to 4000 ppm under confirmed operating conditions |
|
Operating temperature |
0~100°C |
|
Operating pressure |
0~3 bar |
|
Zero point |
pH 7.00 ±0.25 |
|
Process connection |
PG13.5 |
|
Protection rating |
IP68 for applicable correctly sealed configurations |
|
Insertion length |
120, 150, 225, 325 or 425 mm |
|
Temperature element |
NTC 10K, NTC 2.252K, NTC 22K, Pt100 or Pt1000 |
|
Electrical connector |
S8, S8M, S7, VP, K8S or K2 |
Key Features and Engineering Benefits
Specialized HF-Resistant Glass Membrane
Provides improved resistance to HF-related membrane etching compared with conventional pH glass, helping reduce premature drift and sensor failure under confirmed conditions.
Maximum Stated HF Concentration up to 4000 ppm
Supports online pH measurement in diluted HF process liquids, rinse water and fluoride-bearing industrial wastewater where a standard glass electrode may have an unacceptably short service life.
Double-Junction Reference Construction
HF-Service GFT Mixed-Gel Electrolyte
Special Multi-Pore Ceramic Junction
Optional Junction Configurations
Multiple Temperature Element Options
NTC 10K / NTC 2.252K / NTC 22K / Pt100 / Pt1000
Standard PG13.5 Connection
Typical Applications
Metal Surface Treatment
- Diluted acid etching rinse water
- Metal-surface treatment wastewater
- HF-containing cleaning wastewater
- Neutralization tanks
- Fluoride precipitation processes
- Treated-effluent monitoring
Electronics and Electroplating
- Electronics manufacturing wastewater
- Electroplating wastewater
- Surface preparation rinse water
- Fluoride-bearing wastewater treatment
- Acid and alkali neutralization systems
Steel Industry Wastewater
- Selected acid-pickling wastewater
- Steel-surface treatment effluent
- Diluted HF-containing rinse water
- Waste-acid neutralization processes
- Fluoride removal and precipitation systems
Semiconductor and Electronics Wastewater
- Semiconductor etching rinse wastewater
- Wafer-cleaning wastewater
- Fluoride-bearing process wastewater
- Scrubber water containing diluted HF
- HF wastewater collection tanks
- Neutralization and fluoride-removal processes
OEM Wastewater-Treatment Equipment
- HF wastewater-treatment skids
- Fluoride-removal systems
- Neutralization equipment
- pH adjustment panels
- Industrial water-quality monitoring systems
- OEM chemical-treatment equipment
FAQ
The 4000 ppm value refers to hydrofluoric acid (HF) concentration, not total fluoride.
No.
The specialized glass provides improved resistance compared with conventional pH glass, but HF can still attack it. Higher HF concentration, lower pH, higher temperature and longer exposure generally increase the rate of glass degradation.
Hydrofluoric acid reacts with the silica structure of conventional pH glass.
This can cause:
- Membrane etching
- Measurement drift
- Slow response
- Reduced slope
- Thinning of the sensing membrane
- Premature breakage
- Shortened electrode life
Possibly, but PG13.5 thread compatibility alone is not sufficient.
Also confirm:
- Electrode length
- Insertion depth
- Connector type
- Temperature element
- Cable configuration
- Transmitter input
- Process pressure
- HF compatibility
Yes.
Available customization includes:
- Two-point or three-point ceramic junctions
- Annular porous PTFE junction
- Application-specific reference electrolyte
- Multiple insertion lengths
- Temperature-element options
- Connector configurations
Request a Quote and HF Compatibility Review
Need an APS22 quotation or confirmation for an HF-containing process?
Send us your free HF concentration, total fluoride, pH, temperature, pressure, complete chemical composition, installation method, insertion length, temperature element and connector requirements.
ARTang will review the process conditions and confirm whether the APS22 is suitable before quotation.
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.
CE
ISO
3-A
NEPSI
Exhibition Experience
ARTang meets customers and distributors at industry exhibitions to better understand project needs and market requirements.
