MKS 51A12TCD2BA075 Baratron Capacitance Manometer Pressure Switch | Replacement, Equivalent & Selection Guide
The MKS 51A12TCD2BA075 is a Baratron® capacitance manometer-based pressure switch from MKS Instruments, designed for precise vacuum and low-pressure measurement in semiconductor, industrial, and scientific process environments. This page provides full technical specifications, compatible replacement models, equivalent alternatives, and a structured selection guide to help engineers and procurement teams make the right sourcing decision.
Technical Specifications
- Manufacturer: MKS Instruments
- Model / SKU: 51A12TCD2BA075
- Series: Baratron® Type 51A
- Type: Capacitance Manometer Pressure Switch
- Full Scale Range: 75 Torr (decoded from model string: 075)
- Output Signal: Analog (decoded: A = analog)
- Process Connection: Refer to MKS datasheet for fitting type
- Wetted Materials: Inconel® diaphragm (standard Baratron construction)
- Operating Temperature: 0°C to 50°C (ambient)
- Power Supply: ±15 VDC (typical MKS Baratron requirement)
- Accuracy: ±0.5% of reading (typical Baratron 51A series)
- Weight: 1790 g
- Certifications: CE (consult MKS for current compliance status)
Note: Always verify specifications against the official MKS Instruments datasheet before installation.
Compatible Replacement & Equivalent Models
When the MKS 51A12TCD2BA075 is unavailable or discontinued, the following models may serve as direct or functional replacements depending on your process requirements:
- MKS 627D – Baratron capacitance manometer, similar pressure range, widely available
- MKS 622B – Absolute capacitance manometer, compatible with many 51A-series applications
- MKS 390HA – Combination Pirani/capacitance gauge for broader vacuum range coverage
- Inficon CDG025D – Third-party capacitance diaphragm gauge, equivalent measurement principle
- Pfeiffer CMR 362 – Capacitance gauge with comparable accuracy and pressure range
- Edwards APG100-XLC – Alternative for applications tolerating Pirani-type measurement
Compatibility must be verified against your system’s electrical interface, process connection, and pressure range requirements.
Why Choose the Original Model
- Proven Baratron® Technology: MKS Baratron sensors are the industry benchmark for capacitance manometry in semiconductor fabs and research labs worldwide.
- Process Repeatability: Inconel diaphragm construction ensures long-term stability and resistance to corrosive process gases.
- Drop-in Compatibility: Designed as a direct replacement within existing MKS-based vacuum systems without signal conditioning changes.
- OEM Confidence: Specified by leading OEMs including Applied Materials, Lam Research, and Tokyo Electron for critical process steps.
Typical Applications
- Semiconductor CVD / PVD / Etch process chambers
- Vacuum furnace pressure monitoring and control
- Thin-film deposition systems
- Pharmaceutical freeze-drying (lyophilization) equipment
- Research vacuum systems and mass spectrometry
- Industrial leak testing and pressure regulation
System Compatibility
The MKS 51A12TCD2BA075 is compatible with the following control platforms and signal interfaces:
- MKS Type 247, 651, 252 pressure/flow controllers
- Standard ±15 VDC analog signal chains
- PLC systems with analog input modules (4–20 mA or 0–10 V with appropriate signal conditioner)
- DCS platforms via analog I/O cards
- SCADA systems with vacuum gauge interface modules
Selection Guide
Use the following criteria to confirm the MKS 51A12TCD2BA075 is the right choice — or to identify the best alternative:
- Pressure Range: If your process operates at or below 75 Torr full scale, this model is suitable. For higher ranges, consider MKS 627D (1000 Torr) or 622B (10 Torr).
- Gas Compatibility: Inconel diaphragm is compatible with most process gases. For highly corrosive gases (HF, Cl₂), specify a heated or coated variant.
- Output Type: This model provides analog output. If digital (RS-232/RS-485) output is required, consider MKS 910 DualTrans™ series.
- Mounting: Confirm KF/ISO/VCR fitting matches your vacuum system port before ordering.
- Budget vs. OEM: For cost-sensitive applications with less critical accuracy requirements, Inficon CDG025D or Pfeiffer CMR 362 offer competitive alternatives.
Quality Assurance & Sourcing
At Konmask.com, all MKS instruments including the 51A12TCD2BA075 are sourced through verified supply channels. Each unit undergoes:
- Visual and dimensional inspection upon receipt
- Functional verification against MKS factory specifications
- Secure anti-static packaging for shipment
- Full traceability documentation available on request
We supply both new OEM stock and tested surplus / refurbished units — clearly labeled at time of quotation. Certificates of conformance and test reports available for critical applications.
How to Order
- Part Number: MKS 51A12TCD2BA075
- Lead Time: Contact us for current stock availability and lead time
- MOQ: 1 unit
- Payment: T/T, PayPal, credit card accepted
- Shipping: DHL / FedEx / UPS worldwide express; sea freight available for bulk orders
- Request a Quote: Email [email protected] or call +0086 19859288691
Replacement & Compatibility FAQ
Q: Is the MKS 51A12TCD2BA075 still in production?
A: MKS Instruments periodically updates its Baratron product line. Contact us to confirm current OEM availability or to identify the recommended successor model.
Q: Can I replace the 51A12TCD2BA075 with a 627D without rewiring?
A: In most cases yes, as both use the same ±15 VDC supply and analog output convention, but verify connector pinout and process fitting before installation.
Q: Do you supply calibration certificates?
A: Yes, factory calibration certificates are available for new OEM units. For surplus units, third-party calibration can be arranged upon request.
Q: What is the warranty on this product?
A: New OEM units carry the MKS manufacturer warranty. Refurbished/surplus units carry a 90-day Konmask functional warranty. Contact us for details.
Q: Can this gauge be used with corrosive gases?
A: The standard Inconel diaphragm offers good corrosion resistance, but for aggressive chemistries (HF, BCl₃), consult MKS for a heated or chemically resistant variant.
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Contact: [email protected] | +0086 19859288691
