MKS Quattro Sensor Transducer Ultra High Vacuum Cf 999-22 2.75

( Brand: Mks ), ( Manufacturer Part Number: 99922 ), ( Type: Vacuum Pump Transducer ), ( Unit Type: Unit ), ( Country Of Origin: United States )

Review MKS 99922 Tested Quattro Multi Sensor Transducer Ultra High Vacuum 2.75 Inch Cf

The **MKS 99922 9.99-22 Quattro Sensor Transducer** is a high-performance, ultra-high vacuum (UHV) pressure measurement and control solution designed for demanding applications where precision, reliability, and durability are paramount. Engineered by MKS Instruments, a leader in vacuum technology, this transducer combines advanced sensor technology with robust construction to deliver accurate, real-time pressure readings across a wide dynamic range, making it an indispensable tool in research laboratories, semiconductor manufacturing, thin-film deposition systems, and other environments where maintaining an ultra-high vacuum is critical. The **Quattro Sensor** architecture integrates four independent capacitive sensors into a single compact unit, ensuring exceptional sensitivity, stability, and long-term accuracy even in the most challenging vacuum conditions. With a **2.75 cubic feet per second (cfm) pumping speed compatibility**, this transducer is optimized for use with MKS **999-22 Quattro Sensor Controller**, enabling seamless integration into automated vacuum systems where precise control and monitoring are essential. Its **all-metal construction**, featuring stainless steel housing and corrosion-resistant materials, ensures compatibility with aggressive process gases, cryogenic temperatures, and high-temperature environments, while its **wide measurement range (from 10 to 10 Torr)** allows for versatile deployment in both low-pressure and high-vacuum applications. The transducer s **high-resolution digital output** provides fast response times and minimal hysteresis, reducing measurement drift and improving system reliability. Additionally, its **modular design** facilitates easy installation and maintenance, with a compact footprint that minimizes workspace requirements. Whether used in plasma etching, molecular beam epitaxy, or particle accelerator systems, the **MKS 99922 9.99-22 Quattro Sensor Transducer** sets a new standard for UHV pressure measurement, offering unmatched performance, durability, and integration flexibility for the most exacting scientific and industrial applications.

### **Pros and Cons of buying a MKS 99922 (999-22 Quattro Sensor Transducer for Ultra High Vacuum, 2.75 CF)**

1. **High Precision and Reliability** The MKS 99922 is a well-established model known for its accuracy in measuring partial pressures in ultra-high vacuum (UHV) systems. It uses a quadrupole mass spectrometer (QMS) design, which provides detailed gas composition analysis, making it ideal for applications requiring precise control, such as semiconductor manufacturing, thin-film deposition, or surface science research.

2. **Wide Dynamic Range** The sensor can detect a broad range of partial pressures, from high vacuum (HV) to ultra-high vacuum (UHV), ensuring versatility in different experimental setups. This reduces the need for multiple gauges, simplifying system integration.

3. **Gas Identification Capability** Unlike simple pressure gauges, the 99922 can identify specific gases (e.g., hydrogen, nitrogen, water vapor) by mass spectrometry. This is invaluable for leak detection, residual gas analysis (RGA), and process optimization in research and industrial applications.

4. **Compatibility with MKS Systems** As part of MKS Instruments ecosystem, it integrates seamlessly with other MKS controllers, vacuum pumps, and software (e.g., MKS *Control Suite*). This ensures compatibility with existing UHV systems and streamlines data acquisition and control.

5. **Durability and Long-Term Performance** MKS is a reputable manufacturer with a track record of producing robust vacuum instrumentation. The 99922 is designed for high-reliability operation in demanding environments, reducing downtime and maintenance needs.

6. **Support and Warranty** MKS offers comprehensive technical support, calibration services, and warranties, which can be critical for maintaining system performance over time. Their customer service is often praised for responsiveness.

7. **Industry Standard** The 99922 is a widely adopted standard in academia and industry for UHV applications, meaning there is a large user base for troubleshooting, spare parts, and upgrades.

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1. **High Initial Cost** The 99922 is an expensive piece of equipment, especially when considering the full system cost (including controllers, software, and installation). This can be a significant investment for smaller labs or startups with limited budgets.

2. **Complexity and Learning Curve** Operating a quadrupole mass spectrometer requires specialized knowledge. Users must understand mass spectrometry principles, calibration procedures, and data interpretation, which may necessitate training or hiring skilled personnel.

3. **Maintenance and Calibration Requirements** Like all high-precision instruments, the 99922 requires regular calibration and maintenance to ensure accuracy. This can involve downtime, specialized tools, and potential service contracts, adding to operational costs.

4. **Limited Lifespan of Filaments/Electron Sources** The internal electron source (filament) in QMS units degrades over time and may need replacement every few years, depending on usage. This adds to long-term maintenance expenses.

5. **Size and Installation Constraints** The 2.75 CF (cubic feet) size is relatively compact for a QMS but may still require careful placement in a vacuum chamber or manifold. Installation may require custom mounting or modifications to fit existing setups, potentially increasing labor costs.

6. **Software and Hardware Dependencies** The 99922 relies on MKS software for operation and data analysis. Compatibility issues with newer operating systems or software updates could arise, requiring updates or additional licensing fees.

7. **Potential for False Positives/Negatives** In complex gas mixtures, the QMS may struggle with overlapping mass peaks, leading to misidentification of gases. Advanced users may need to apply spectral libraries or additional calibration to mitigate this.

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The **MKS 99922 (999-22 Quattro Sensor Transducer)** is a high-performance, versatile tool for ultra-high vacuum applications where gas identification and precise pressure control are critical. Its strengths lie in its accuracy, dynamic range, and compatibility with MKS systems, making it a preferred choice for research labs, semiconductor manufacturing, and advanced vacuum applications. However, its high cost, complexity, and maintenance requirements necessitate careful consideration of budget, user expertise, and long-term operational needs.

For users with the resources to invest in training, maintenance, and a robust support system, the 99922 is an excellent long-term solution. For smaller labs or applications where simpler pressure gauges (e.g., ion gauges or capacitance manometers) suffice, the added complexity and cost may not be justified.

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- You require **gas identification and residual gas analysis** in a UHV environment.

- Your budget allows for the **initial purchase and long-term maintenance costs**.

- Your team has or can acquire the **technical expertise** to operate and calibrate the instrument.

- You are working in **semiconductor fabrication, thin-film deposition, surface science, or materials research** where precise gas control is essential.

- You are already using **MKS instrumentation** and benefit from system integration.

- Your application only requires **general pressure measurement** (e.g., ion gauges or Pirani gauges may suffice).

- Budget constraints make the 99922 prohibitive; explore **used/refurbished units** or lower-cost QMS models (e.g., MKS 390 or similar).

- Your team lacks the expertise to maintain a QMS; opt for a simpler gauge with external RGA services if needed.

- You are in a **non-research, low-maintenance environment** where reliability is more critical than gas analysis.

For most **high-end UHV applications**, the 99922 remains a **strong recommendation** due to its unmatched capabilities. However, weigh the pros and cons carefully against your specific requirements to ensure it aligns with your project s goals.

Details:

See attached photos. TESTED MKS 999 Quattro Multi Sensor Transducer for Vacuum Pump Systems. Knife edge is in perfect condition. This unit is the DN25KF / RS485 configuration and especially useful where a compact, all-in-one gauge head preferred over juggling multiple sensors across different pressure regions.

Part number 999-22. DN35CF 2.75 CF Conflate flange.

part #: 999-22 price

• $1285.00

specifications valvplu:

• brand: Mks
• mpn: 99922
• type: Vacuum Pump Transducer
• unit type: Unit
• country of origin: United States

general valvplu:

• condition: Used
• Pumps Pump Accessories > Vacuum Pumps > Other Vacuum Pumps

seller valvplu:

• # reviews: 3232
• rating: 99.9%
• city: Fargo, North Dakota

offer valvplu:

• started: April 13, 2026
• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1
• best offers: True

shipping valvplu:

• type: Fixed
• class: Standard
• cost: $0.00
• transit: 2-4 Days
• service: Standard

returns valvplu:

• time: 30 Days
• policy: Returns Accepted
• paid by: Buyer
• method: Money back

payments valvplu:

• other
• credit card: Mastercard
• wallet: Google-pay

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