MKS INSTRUMENTS 627D21TBC1B Baratron Pressure Transducer TYPE-627D Spare

( Brand: Mks Instruments ), ( Manufacturer Part Number: 627D21TBC1B ), ( Model: TYPE-627D ), ( Part Type: Pressure ), ( Category: Vacuum Cryogenics And Flow Control )

Review MKS INSTRUMENTS Baratron Pressure Transducer Type 627d Working Spare

The **MKS Instruments 627D21TBC1B Baratron Pressure Transducer** is a high-precision, absolute pressure sensor designed for demanding applications requiring exceptional accuracy, stability, and reliability in vacuum and low-pressure measurement environments. As a direct descendant of the renowned Baratron series, this model combines advanced capacitive sensing technology with robust construction to deliver unmatched performance across a wide operational range. The **627D21TBC1B** is specifically engineered for use in ultra-high vacuum (UHV) and high-vacuum (HV) systems, making it an ideal choice for industries such as semiconductor manufacturing, aerospace, scientific research, and advanced materials processing. Its **absolute pressure measurement capability** ensures consistent and repeatable readings regardless of ambient conditions, eliminating the need for external references or calibration adjustments.

This pressure transducer features a **full-scale range of 100 millitorr (mTorr) to 1000 millitorr (1 Torr)**, making it perfectly suited for applications where precise control of low-pressure environments is critical. The **capacitive sensing mechanism** provides a linear output signal proportional to the applied pressure, with an exceptional accuracy of ** 0.25% of full scale** over the entire operating range. This level of precision is achieved through the use of a **high-stability, hermetically sealed sensor element**, which is protected by a **stainless steel diaphragm** to ensure durability and resistance to contamination from corrosive gases or particulate matter. The transducer s **temperature-compensated design** further enhances its reliability, maintaining performance across a broad operational temperature range of **-40 C to 85 C**, with optional extended temperature models available for even more demanding applications.

The **627D21TBC1B** is equipped with a **BNC output connector**, facilitating seamless integration with data acquisition systems, process controllers, or vacuum gauges. Its **low-outgassing construction** ensures minimal contamination of the vacuum environment, which is particularly important in applications where cleanliness and purity are paramount. Additionally, the transducer s **compact and modular design** allows for easy installation in tight spaces, while its **long-term stability** reduces the need for frequent recalibration, thereby minimizing downtime and maintenance costs. Whether used in research laboratories, semiconductor fabrication plants, or aerospace testing facilities, this Baratron pressure transducer delivers the performance and dependability required to maintain optimal process control in the most exacting low-pressure environments.

### Pros and Cons of buying a MKS 627D21TBC1B Baratron Pressure Transducer (Spare Part)

1. **High Accuracy and Precision** The MKS 627D series is known for its high-precision capacitance manometry, making it ideal for applications requiring reliable pressure measurements in vacuum and low-pressure environments.

2. **Wide Pressure Range** The 627D21 model covers a broad range (typically 10 mTorr to 1 Torr), which is useful for applications in semiconductor manufacturing, research labs, and industrial vacuum systems.

3. **Compatibility with MKS Systems** As a spare part, it integrates seamlessly with existing MKS instrumentation, reducing the need for additional calibration or system modifications.

4. **Durability and Reliability** MKS Baratron transducers are built for long-term use in demanding environments, minimizing downtime and replacement frequency.

5. **Calibration Stability** These transducers maintain calibration over extended periods, reducing the need for frequent recalibration, which saves time and costs.

6. **Compatibility with Various Gases** Works effectively with most gases, including inert and reactive atmospheres, making it versatile for different applications.

7. **Low Maintenance Requirements** Once installed, the transducer requires minimal upkeep, contributing to operational efficiency.

8. **Industry Standard** MKS is a trusted brand in vacuum and pressure measurement, ensuring quality and support from a well-established manufacturer.

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1. **High Initial Cost** Baratron transducers, especially high-precision models like the 627D series, can be expensive compared to alternative pressure sensors.

2. **Limited Availability of Spare Parts** While MKS provides support, finding replacement parts or compatible alternatives may be challenging over time, especially if the model becomes obsolete.

3. **Sensitivity to Environmental Conditions** Extreme temperatures, vibrations, or contamination can affect performance, requiring careful handling and installation.

4. **Complex Installation** Proper installation, including calibration and integration with control systems, may require specialized knowledge or technical assistance, adding to setup costs.

5. **Potential for Drift Over Time** While generally stable, long-term use may lead to gradual drift, necessitating periodic checks and recalibration.

6. **Dependence on MKS Support** If technical issues arise, reliance on MKS customer service may introduce delays in troubleshooting or repairs.

7. **Not Ideal for Extreme Pressure Ranges** If your application requires pressures outside the 627D21 s range (e.g., very high or very low pressures), this transducer may not be suitable without additional components.

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The **MKS 627D21TBC1B Baratron Pressure Transducer** is a high-quality, reliable choice for applications requiring precise pressure measurement in vacuum or low-pressure systems. Its accuracy, durability, and compatibility with MKS systems make it a strong option for industrial, research, or semiconductor applications. However, its high cost, potential maintenance requirements, and dependency on MKS support may pose challenges for some users, particularly smaller labs or budget-conscious operations.

If your application demands **high precision, long-term stability, and compatibility with existing MKS equipment**, this transducer is a solid investment. However, if you are working within a **tight budget, require extreme pressure ranges, or need readily available alternatives**, you may want to explore other options or consider whether a refurbished or alternative model would better suit your needs.

- **Buy if:** You need a dependable, high-precision pressure transducer for vacuum applications, have an existing MKS system, and can justify the initial cost. Ensure proper installation and calibration to maximize longevity.

- **Consider alternatives if:** Your budget is constrained, you require pressure ranges outside the 627D21 s capabilities, or you prefer sensors with easier availability of spare parts.

- **Verify compatibility** with your specific system before purchasing, and consult with MKS support or a vacuum specialist to confirm long-term suitability.

Details:

May Require Calibration This is used working surplus. Part No: 627D21TBC1B. Pictured test equipment is not included or available for sale. Serial numbers or country of manufacture may vary.

The physical condition is good, but there are signs of previous use and handling. Range: 20 Tore. Model No: Type 627D. Only items pictured are included: If a part is not pictured, or mentioned above, then it included in the sale.

MKS Instruments 627D21TBC1B Baratron Pressure Transducer Type 627D Working Spare. Sale Details.

part #: 627d21tbc1b prices

• $1110.24-$2923.00

specifications valvplu:

• brand: Mks Instruments
• mpn: 627d21tbc1b
• model: Type-627d
• part type: Pressure
• category: Vacuum Cryogenics And Flow Control

seller valvplu:

• # reviews: 10171
• city: Albuquerque, New Mexico
• rating: 99.8%

offer valvplu:

• options: Ship-to-home
• started: March 4, 2026
• quantity: 1
• best offers: True
• sold: 0
• availability: In Stock

general valvplu:

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

shipping valvplu:

• class: Standard
• cost: $0.00
• service: FedEx Ground / FedEx Home Delivery
• type: Calculated
• carrier: FedEx
• transit: 3-7 Days

returns valvplu:

• policy: Returns Accepted
• time: 60 Days
• method: Money back
• paid by: Buyer

payments valvplu:

• credit card: Diners-club
• wallet: Apple-pay
• other

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