GRANVILLE-PHILLIPS 275805 Mini Convectron Vacuum Ion Gauge Philips C202218

( Brand: Granville-phillips ), ( Manufacturer Part Number: 275805 ), ( Part Type: Vacuum Gauge )

Review GRANVILLE PHILLIPS Lot 275 Mini convectron Vacuum ion Gauge

The **Granville-Phillsips 275805 C202218 275 Mini-Convectron Vacuum Mini-Ion Gauge** is a precision-engineered, compact yet highly capable vacuum measurement instrument designed for applications requiring accurate, real-time monitoring of low-pressure environments. This advanced gauge combines the reliability of a **Convectron** design with the efficiency of a **mini-ion gauge**, delivering exceptional performance in research laboratories, semiconductor manufacturing, thin-film deposition, and materials science facilities. Built with a robust **275-series** architecture, the gauge features a **hot cathode ionization principle**, where electrons emitted from a heated filament ionize residual gas molecules, generating a measurable ion current proportional to the gas density. This principle ensures high sensitivity across a broad pressure range, from ultra-high vacuum (UHV) conditions down to rough vacuum levels, making it ideal for applications where precise control of ambient pressure is critical.

The **Mini-Convectron** configuration of this gauge offers a compact form factor without compromising accuracy, making it well-suited for integration into space-constrained systems or portable setups. Its **C202218** designation indicates a model optimized for stability and durability, featuring a **ceramic or metal-ceramic construction** to withstand thermal cycling and harsh environmental conditions. The gauge s **mini-ion gauge** component enhances its responsiveness, particularly in dynamic vacuum environments where rapid pressure fluctuations demand quick and reliable readings. This dual-mode operation ensures both high sensitivity at low pressures and robust performance at higher ranges, providing a versatile solution for a wide array of vacuum applications.

One of the standout features of this instrument is its **digital or analog output capability**, allowing seamless integration with modern data acquisition systems, process controllers, or laboratory instrumentation. The gauge s **calibrated response** across multiple gases (including nitrogen, argon, and hydrogen) ensures consistent and repeatable measurements, reducing the need for frequent recalibration. Additionally, its **low power consumption** and **long operational lifespan** make it an economical choice for continuous monitoring tasks. Whether used in **sputtering chambers, electron microscopes, or vacuum furnaces**, the **Granville-Phillsips 275805** delivers the precision and reliability required to maintain optimal vacuum conditions for high-technology processes.

For users seeking a balance between performance and practicality, this gauge also incorporates **user-friendly features** such as **adjustable gain settings** and **built-in diagnostics**, allowing operators to fine-tune sensitivity and troubleshoot potential issues efficiently. Its **compact yet sturdy design** ensures compatibility with standard vacuum flange connections, while its **durable construction** minimizes the risk of contamination or damage in demanding environments. Overall, the **Granville-Phillsips 275805 Mini-Convectron Vacuum Mini-Ion Gauge** represents a sophisticated yet accessible solution for professionals who demand accuracy, durability, and versatility in their vacuum measurement needs.

**Pros and Cons of buying a Granville-Phillips 275805 (275 Mini-Convectron Vacuum Mini-Ion Gauge)**

### **Pros**

1. **Precision and Reliability** The 275 Mini-Convectron is a well-regarded vacuum gauge designed for high-accuracy pressure measurements in research, semiconductor, and thin-film deposition applications. Its ion gauge technology provides stable readings across a wide pressure range (10 -1 to 10 -11 Torr), making it suitable for ultra-high-vacuum (UHV) systems.

2. **Compact and Portable Design** As a "mini" version, it is smaller and more maneuverable than larger industrial gauges, allowing for easier integration into research setups or portable vacuum systems.

3. **Compatibility with GP s Ecosystem** Granville-Phillips (now part of MKS Instruments) is a trusted brand in vacuum technology, and this gauge is designed to work seamlessly with other GP instruments, such as controllers and vacuum pumps, ensuring better system integration.

4. **Durability and Longevity** Built for laboratory and industrial use, the gauge is constructed to withstand prolonged operation in demanding environments, reducing the need for frequent replacements.

5. **Calibration and Support** Granville-Phillips offers calibration services and technical support, which can be crucial for maintaining accuracy over time, especially in critical applications like semiconductor manufacturing.

6. **Versatility** The Mini-Convectron can be used in various applications, including sputtering, evaporation, and other vacuum processes, making it a flexible tool for different research and industrial needs.

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### **Cons**

1. **High Initial Cost** Like most high-precision vacuum gauges, the 275 Mini-Convectron is an expensive investment. The price may be prohibitive for small labs, startups, or hobbyists without dedicated funding.

2. **Maintenance and Calibration Requirements** Ion gauges require periodic calibration and maintenance to ensure accuracy. Failure to maintain the gauge properly can lead to inaccurate readings, potentially compromising experimental or production results.

3. **Limited Pressure Range for Some Applications** While it covers a broad range (10 -1 to 10 -11 Torr), some specialized applications (e.g., extremely low pressures or high-temperature environments) may require additional or complementary gauges.

4. **Sensitivity to Contaminants** Ion gauges can be affected by residual gases or contaminants in the vacuum chamber, which may require additional purification systems (e.g., getters or cold traps) to maintain optimal performance.

5. **Learning Curve** Proper operation and interpretation of readings may require training, especially for users unfamiliar with vacuum technology. Misuse can lead to damage or inaccurate data.

6. **Depreciation Over Time** High-end vacuum equipment can depreciate quickly, particularly if newer or more efficient models become available. This may impact resale value or long-term cost-effectiveness.

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### **Conclusion**

The Granville-Phillips 275 Mini-Convectron is a robust, high-precision vacuum gauge ideal for research laboratories, semiconductor manufacturing, and other applications requiring accurate pressure measurements in ultra-high-vacuum environments. Its reliability, compatibility with other GP instruments, and compact design make it a strong choice for professionals who prioritize performance and integration. However, the high upfront cost, maintenance demands, and potential need for complementary equipment must be carefully considered.

### **Recommendation**

- You are working in a field (e.g., materials science, semiconductor research, thin-film deposition) where precise vacuum control is critical.

- Your budget allows for the initial investment and potential maintenance costs.

- You already use or plan to use other Granville-Phillips instruments, as this will enhance system compatibility.

- You have access to technical support or personnel experienced in operating ion gauges.

- You are a small lab or startup with limited funding, as there may be more cost-effective options (e.g., less precise but sufficient gauges for lower-pressure applications).

- Your application does not require the full range of the gauge (e.g., if you only need measurements in the mid-vacuum range, a different type of gauge may suffice).

- You lack the expertise or resources to properly calibrate and maintain the gauge, as this could lead to costly errors or downtime.

For users on a tighter budget or with simpler needs, alternatives like capacitance manometers or less expensive ion gauges (e.g., from other manufacturers) might be worth exploring. However, for professionals in demanding vacuum applications, the 275 Mini-Convectron remains a top-tier choice.

Details:

This lot includes three Granville-Phillips 275 Mini-Convectron Vacuum Gauges one 275805 with NW10 Flange, and two 275807 NW25 Flange, along one Mini-Ion Gauge cat.no. Approximate overall unpacked dimensions: 9 L x 8 W 7. However, I have no way of testing them, and they are being sold as-is. They look to be in good cosmetic condition, showing some minor signs of wear.

20343041, as shown. No software, power cords, or other accessories are included unless stated above. The unpacked weight of this item is 4 pounds.

part #: 275805 prices

• $75.00-$881.78

specifications valvplu:

• brand: Granville-phillips
• mpn: 275805
• part type: Vacuum Gauge

returns valvplu:

• policy: No Returns

payments valvplu:

• wallet: Paypal
• other
• credit card: Diners-club

general valvplu:

• condition: For parts or not working
• Pumps Pump Accessories > Vacuum Pumps > Other Vacuum Pumps

shipping valvplu:

• cost: $60.70
• service: UPS Ground
• transit: 2-6 Days
• type: Calculated
• class: Standard
• carrier: UPS

seller valvplu:

• city: Gilroy, California
• rating: 100.0%
• # reviews: 52639

offer valvplu:

• best offers: True
• availability: In Stock
• started: April 8, 2026
• sold: 0
• quantity: 1
• options: Ship-to-home

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