Analog PH Electrode Suitable For Water Purification >5μS/Cm
Daruifuno ASP121E analog pH Sensor:
Precision and Longevity
The ASP121E pH sensor is a versatile and durable choice, engineered for a wide measuring range of 0 to 14 pH. It utilizes a low-impedance cylindrical glass membrane to deliver fast and stable readings.
A key feature is its sophisticated Ag/AgCl reference system. This design incorporates a double salt bridge and a KCl gel electrolyte, significantly extending the sensor's lifespan and ensuring reliable performance in challenging environments where conventional single-junction electrodes often fail.
Built for Reliability and High Performance Constructed with durability in mind, the electrode features a resilient glass body and a distinctive dot-shaped ceramic junction (frit), offering excellent resistance to chemical corrosion.
Operating Parameters:
Standard Operation: The sensor operates continuously from 0∘C to 80∘C with pressures reaching 6 bar.
High-Temperature Capability: For brief periods (less than 60 minutes), it can endure temperatures up to 100∘C at pressures up to 3 bar.
Customizable High-Temperature Model: An optional version is available for continuous use up to 100∘C or short-term spikes (under 60 minutes) up to 135∘C. This enhanced model has demonstrated excellent endurance, successfully completing over 40 high-temperature cycles in clean water testing.
Key Technical Specifications
The ASP121E is built for exceptional accuracy, with technical specifications to back it up:
Sensitivity (Slope): Greater than 95%.Zero Point (E0): ±0.25 pH.
Temperature Compensation: Offers flexible integration with PT100, PT1000, or NTC10K sensors for precise readings across varying temperatures.
Optimal Flow Rate: Designed for sample flow rates between 0.001 m/s and 0.5 m/s.
Physical Specifications: Standard dimensions are 12 mm in diameter and 120 mm in length, with customization available.
Installation: Features a standard PG13.5 mounting thread for straightforward integration.
Wiring: Available with integral or split leads for flexible setup.
This electrode is highly recommended for pure water applications with conductivity greater than 5μS/cm, establishing it as a definitive choice for reliable and precise pH monitoring.
Specifications
| Model | ASP120E | ASP121E | ASP122E | ASP123E | ASP124E |
| Measuring Object | PH |
| Measuring Range | 0~14pH |
| Indicator Electrode | low impedance cylindrical glass membrane |
| Reference System | Ag/AgCl reference electrode, double salt bridge, KCl gel |
| Electrode Material | Glass+Dot-shaped ceramic hole | Glass+Porous tetrafluoro ring | Glass+ceramic sand core |
| Working Pressure | Medium and low temp environment: max. 0~6bar High temp environment: 0~3bar |
| Working Temp. | Medium and low temp. environment: 0~80℃, continuous work High temp. environment: 80~100℃, continuous work for less than 60 minutes Customzied as below : Medium and low temp. Env.: 0~100℃, continuous work High temp. Env.: 100~135℃, continuous work < 60 mins High temp. Env. work more than 40 times (clean water test env.) |
| Sample Flow Rate | 0.5 m/s ≥ flow velocity ≥ 0.001 m/s |
| Zero (E0) | ±0.25pH |
| SLOP% | ＞95% |
| Temperature Unit | PT100, PT1000, NTC10K customized |
| Dimension | Standard: diameter 12mm/Length 120mm (customized) |
| Installation Thread | PG13.5 |
| Tail Lead | Integral or split |
| Application | Strong acid and alkali | Normal temp. pure water >5μS/cm | Harsh industrial process* | Normal temp. desulfurization or viscous slurry | Hydrofluoric acid with concentration ≤4000ppm |
| Model | ASP125E | ASP126E | ASP127E | ASR120E | ASP128E |
| Measuring Object | PH | ORP | PH |
| Measuring Range | 0~14pH | ±2000mV | 0~14pH |
| Indicator Electrode | low impedance cylindrical glass membrane | Platinum | glass membrane |
| Reference System | Ag/AgCl reference electrode, double salt bridge, KCl gel |
| Electrode Material | Glass+ceramic sand core |
| Working Pressure | Medium and low temp environment: max. 0~6bar High temp environment: 0~3bar | max. 0~6bar |
| Working Temp. | Medium and low temp. environment: 0~80℃, continuous work High temp. environment: 80~100℃, continuous work for less than 60 minutes Customzied as below : Medium and low temp. Env.: 0~100℃, continuous work High temp. Env.: 100~135℃, continuous work < 60 mins High temp. Env. work more than 40 times (clean water test env.) | -15~80℃, continuous work |
| Sample Flow Rate | 0.5 m/s ≥ flow velocity ≥ 0.001 m/s |
| Zero (E0) | ±0.25pH |
| SLOP% | ＞95% |
| Temperature Unit | PT100, PT1000, NTC10K customized |
| Dimension | Standard: diameter 12mm/Length 120mm (customized) |
| Installation Thread | PG13.5 |
| Tail Lead | Integral or split |
| Application | Strong acid and alkali | Harsh conditions &high pollution | Fermentation process | High temp. Industrial process | Low temp. |
Features & Advantages
- Large capacity reference for extended service life
- Optional cleaning connector for underwater maintenance
- Available with PTFE protective cover and self-cleaning interface
- Self-cleaning function enhances stability, accuracy, and reliability while reducing maintenance costs
- Suit for Pure Water >5μS/Cm
The ASP121E glass pH sensor offers ultimate flexibility with custom mounting accessories for pure water environment:
- Sidewall Mounting: Ideal for large tanks and vessels
- Top Flange Mounting: Perfect for sealed reactors
- Pipe/Flow Cell Mounting: For in-line measurements
- Submersible Mounting: For open tanks and channels
- Manual Retractable Holder: Enables maintenance without process shutdown
Enhanced Durability with PTFE Sheath
The optional PTFE (Teflon) sheath. Featuring 3/4" NPT threads for easy attachment to mounting accessories, it ensures seamless integration across various applications.
Application For Pure Water >5μS/Cm
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Analog PH Electrode Suitable For Water Purification >5μS/Cm Images
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