PFEIFFER VACCUUM PTR25500 Ikr Cathode Gauge 251

( Brand: Pfeiffer Vaccuum ), ( Manufacturer Part Number: PTR25500 ), ( Part Type: Gauge ), ( Valve Operation: Compact Cold Cathode Gauge )

Review PFEIFFER VACCUUM Ikr 251 Compact Cold Cathode Gauge

The **Pfeiffer Vacuum PTR25500 IKR 251 Cathode Gauge** is a high-performance, precision-engineered vacuum measurement instrument designed for demanding applications in research, semiconductor manufacturing, thin-film deposition, and industrial process control. Part of Pfeiffer Vacuum s renowned **IKR series**, this gauge combines advanced **inverted magnetron cathode technology** with unparalleled sensitivity and reliability, making it an indispensable tool for achieving ultra-high vacuum (UHV) and high-vacuum (HV) environments with exceptional accuracy. The PTR25500 IKR 251 operates on the principle of **inverted magnetron ionization**, where electrons are emitted from a heated cathode and accelerated toward a negatively biased anode, ionizing residual gas molecules in the chamber. These ions are then collected and measured, providing real-time pressure readings across a broad dynamic range from **10 mbar (10 Pa) up to 10 mbar (10 Pa)** with a response time as fast as **100 milliseconds**, ensuring rapid and precise process monitoring.

What sets the IKR 251 apart is its **dual-mode operation**, allowing seamless switching between **inverted magnetron mode** (for high sensitivity in UHV) and **standard ionization mode** (for broader pressure ranges), making it versatile for applications where pressure conditions fluctuate significantly. The gauge features a **ceramic-insulated cathode**, which enhances durability and minimizes outgassing, while its **integrated cold cathode** design eliminates the need for external power supplies, reducing system complexity. The **IKR 251 s compact yet robust construction** ensures compatibility with a wide range of vacuum chambers, including those with limited space constraints, while its **modular design** allows for easy integration into automated control systems via **Pfeiffer s proprietary Vacuum Gauge Controller (VGC)** or third-party interfaces such as **PID, RS-232, or Profibus**. The gauge s **self-calibrating mechanism** and **automatic zero-point correction** further minimize maintenance requirements, ensuring long-term stability and consistency in critical applications like **sputtering, molecular beam epitaxy (MBE), or plasma etching**.

Beyond its technical prowess, the PTR25500 IKR 251 is engineered with **industry-leading reliability**, featuring a **lifetime of over 10,000 hours** under optimal conditions, thanks to its **low-maintenance cathode design** and **superior materials resistance** to contamination and thermal stress. Its **wide gas response** covering noble gases, reactive gases, and hydrocarbons ensures accurate measurements across diverse process environments, while its **low noise floor** and **high signal-to-noise ratio** make it ideal for applications where trace gas detection is critical. Whether used in **semiconductor wafer fabrication, surface science research, or advanced materials development**, the IKR 251 delivers the precision and dependability required to maintain tight process control, reduce downtime, and achieve superior product quality. With Pfeiffer Vacuum s reputation for innovation and engineering excellence, this cathode gauge represents a benchmark in vacuum metrology, offering a perfect blend of **cutting-edge technology, durability, and ease of use** for the most exacting industrial and scientific applications.

### **Pfeiffer Vacuum PTR25500 with IKR 251 Cathode Gauge: Pros and Cons**

#### **Pros**

1. **High Accuracy and Reliability**

The PTR25500 is a high-performance cold cathode gauge designed for precise pressure measurement in ultra-high vacuum (UHV) and high-vacuum (HV) applications. It offers excellent stability and repeatability, making it suitable for research, semiconductor manufacturing, and thin-film deposition.

2. **Wide Pressure Range**

The gauge covers a broad range from **10 mbar (UHV) to 10 mbar (HV)**, which is ideal for applications requiring both low-pressure and roughing measurements. The IKR 251 cathode further extends its utility in dynamic pressure monitoring.

3. **Durability and Long Lifespan**

Cold cathode gauges are known for their robustness compared to hot cathode gauges, as they lack fragile filaments. The PTR25500 is built to withstand harsh environments, reducing maintenance and replacement costs over time.

4. **Compatibility with Pfeiffer s Ecosystem**

Pfeiffer Vacuum offers a range of compatible controllers, interfaces, and software (e.g., **Vacuum Gauge Controller VGCI, Vacuum Control Interface VCI**), making integration into existing systems seamless.

5. **Low Maintenance Requirements**

Unlike hot cathode gauges, which require periodic filament replacements, cold cathode gauges have fewer consumable parts, reducing downtime and service needs.

6. **Good for Dynamic Pressure Measurements**

The IKR 251 cathode provides enhanced sensitivity in transient pressure conditions, useful in processes like sputtering or etching where pressure fluctuations occur.

7. **Calibration Stability**

Cold cathode gauges generally retain calibration better over time compared to hot cathode gauges, which can suffer from filament degradation.

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#### **Cons**

1. **Higher Initial Cost**

The PTR25500 is a premium vacuum gauge, and its price is significantly higher than basic hot cathode or capacitive manometer gauges. This may be a barrier for small labs or budget-conscious applications.

2. **Limited Lower Pressure Range Compared to Ionization Gauges**

While it excels in UHV and HV, it does not match the sensitivity of **Bayard-Alpert or Penning ionization gauges** in the **10 to 10 mbar** range, which may be necessary for certain high-precision applications.

3. **Potential for False Readings in Reactive Gases**

Cold cathode gauges can be affected by **gas composition changes**, particularly in reactive or corrosive environments (e.g., oxygen, fluorine). This may require additional calibration or compensation.

4. **Sensitivity to Magnetic Fields**

The gauge s performance can be influenced by external magnetic fields, which may require shielding in some applications.

5. **Limited Availability of Spare Parts**

As a specialized gauge, finding replacement parts or service providers may be more difficult compared to more common vacuum gauges.

6. **Learning Curve for Operation**

Proper setup, calibration, and troubleshooting may require training, especially for users unfamiliar with cold cathode technology.

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### **Conclusion**

The **Pfeiffer Vacuum PTR25500 with IKR 251 cathode gauge** is an excellent choice for applications requiring **high accuracy, durability, and a wide pressure range** in **UHV and HV environments**. It is particularly well-suited for **semiconductor processing, thin-film deposition, and research labs** where reliability and low maintenance are critical.

However, if **ultra-low-pressure sensitivity (below 10 mbar) is required**, an ionization gauge may be a better alternative. Additionally, users working with **reactive gases or in strong magnetic fields** should consider potential limitations and mitigation strategies.

### **Recommendation**

- You need a **robust, long-lasting gauge** for **UHV/HV applications** (e.g., sputtering, CVD, surface science).

- Your budget allows for a **premium vacuum gauge** with minimal maintenance.

- You require **dynamic pressure monitoring** and compatibility with Pfeiffer s ecosystem.

- You need **extremely low pressures (below 10 mbar)**, in which case an **ionization gauge (e.g., Pfeiffer PKR 251)** may be more appropriate.

- Your application involves **highly reactive gases** where calibration stability could be an issue.

- Cost is a major constraint, as cheaper hot cathode or capacitive manometer gauges may suffice for less demanding applications.

For most **high-end vacuum applications**, the PTR25500 remains a **strong, reliable choice** just ensure proper installation, calibration, and environmental considerations are addressed.

Details:

Great condition ready to ship The Pfeiffer Vacuum IKR 251 PTR25500 compact cold cathode gauge is a high-quality vacuum designed for precise and accurate measurements. As a product from Pfeiffer Vacuum, trusted brand in vacuum technology, users can expect superior quality and functionality this gauge. With its compact design, it is ideal for use in a variety of industrial and laboratory applications. The cold cathode technology ensures reliable performance and stability, making it a valuable tool for maintaining vacuum conditions in various settings.

part #: ptr25500 prices

• $151.99-$250.84

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• brand: Pfeiffer Vaccuum
• mpn: Ptr25500
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• valve operation: Compact Cold Cathode Gauge

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