631F13TBFP MKS 600 Series Precision Absolute Pressure Transducer

MKS Instruments 631F13TBFP | 200°C Heated Baratron Pressure Transducer

The MKS Instruments 631F13TBFP is a high-temperature absolute pressure transducer from the 631F Series within the 600 Series product family.

It measures absolute pressure across a 1000 Torr full-scale range. Its sensor maintains a controlled operating temperature of 200°C. This thermal design supports stable pressure measurement in demanding semiconductor processes.

The compact, self-contained assembly integrates pressure sensing, temperature regulation, and analog signal output. It provides a 0 to +10 VDC output for compatible measurement and control systems.

Its nickel-alloy wetted construction supports demanding process environments. The 8 VCR female connection provides a defined interface for vacuum and process gas systems.

01 | Product Identification & Measurement Architecture

Manufacturer	MKS Instruments
Model	631F13TBFP
Product Series	631F Series
Product Family	600 Series
Product Type	High-Temperature Baratron Absolute Pressure Transducer
Measurement Principle	Baratron Capacitance Manometer
Measurement Type	Absolute Pressure
Full-Scale Range	1000 Torr
Sensor Temperature	200°C Controlled
Temperature Configuration	Heated Sensor Assembly
Output	0 to +10 VDC
Compliance	CE Compliant

02 | Measurement Performance: Accuracy, Speed & Resolution

The measurement architecture targets accurate absolute pressure monitoring under elevated sensor temperatures. Its performance specifications cover accuracy, signal resolution, and dynamic response.

Measurement Parameter	Specification
Full-Scale Pressure	1000 Torr
Accuracy	0.50% of Reading
Accuracy Components	Includes non-linearity, hysteresis, and non-repeatability
Resolution	0.01% of Full Scale
Response Time	50 ms
Warm-Up Time	4 hours or less
Measurement Mode	Absolute Pressure

Engineering Interpretation

• Accuracy: The 0.50% reading specification includes three major measurement error components.
• Resolution: The 0.01% FS specification corresponds to 0.1 Torr at a 1000 Torr range.
• Response: The 50 ms response supports monitoring of relatively fast pressure changes.
• Warm-Up: Allow up to four hours for thermal stabilization before relying on specified measurement performance.

Resolution describes the smallest specified measurement increment. It does not represent absolute measurement accuracy or guaranteed display precision.

03 | Thermal Engineering: 200°C Sensor Control

The defining feature of the 631F13TBFP is its controlled 200°C sensor temperature. Heating maintains the sensing assembly at an elevated operating temperature while the surrounding environment remains within its specified limits.

Controlled Sensor Temperature	200°C
Ambient Operating Temperature	15–50°C
Zero Temperature Coefficient	0.008% FS/°C
Zero Temperature Coefficient, 1 Torr Range	0.016% FS/°C
Span Temperature Coefficient	0.02% of Reading/°C
High-Ambient Airflow	150 ft/min at 40–50°C
Over-Temperature Protection	Fail-safe protection provided

Installation Consideration: Sensor temperature and ambient operating temperature describe different conditions. The 200°C rating applies to the controlled sensing assembly, not the surrounding installation environment.

Maintain the specified airflow when ambient temperatures reach 40–50°C. Restricted airflow can affect thermal management and measurement stability.

04 | Electrical Interface & Control Signals

The electrical architecture uses bipolar DC power and a single-ended voltage output. The interface supports integration with compatible pressure monitoring equipment and analog control systems.

Power Supply	±15 VDC ±5%
Maximum Current	1.0 A
Analog Output	0 to +10 VDC
Minimum Output Load	Greater than 10 kΩ
Electrical Connector	15-pin D-sub
Connector Retention	Thread Locks
Relay Configuration	0 Relays
Trip Points	Not Available

Status Indication

• At Temperature: Indicates the sensor heating status.
• Heater Failure: Indicates a heater-related fault condition.
• Fail-Safe Protection: Provides over-temperature protection.

This configuration has no integrated relay trip outputs. Applications requiring independent pressure alarm contacts need external monitoring or control hardware.

05 | Process Interface & Wetted Construction

The process connection and internal materials determine mechanical compatibility with the gas delivery system.

Pressure Connection	8 VCR Female
Wetted Materials	Inconel or Incoloy Nickel Alloys
Internal Volume	6.3 cc
Overpressure Limit	45 psia

Material Selection Considerations

• Confirm process gas compatibility with the specified nickel-alloy wetted materials.
• Check the seal and fitting requirements against the gas delivery assembly.
• Consider internal volume when evaluating chamber response and process-line configuration.
• Keep the applied pressure within the specified overpressure limit.

The 45 psia overpressure limit is not a normal operating pressure rating. Engineers must evaluate the pressure conditions before connecting the transducer.

06 | Mechanical Envelope & Installation Space

Body Diameter	3.15 in (80.0 mm)
Body Height	4.55 in (115.5 mm)
Fitting Stem Length	1.58 in (40.0 mm)
Process Connection	8 VCR Female
Internal Volume	6.3 cc

Allow sufficient clearance around the heated body and electrical connector. The installation must also preserve the required cooling airflow at elevated ambient temperatures.

07 | Installation & Commissioning Procedure

Mechanical Preparation

1. Verify the model and 1000 Torr full-scale range.
2. Check the mounting space and 8 VCR female connection.
3. Inspect the fitting and mating sealing surfaces.
4. Confirm process gas compatibility with the wetted materials.
5. Verify that expected pressure conditions remain within the specified limit.

Electrical Preparation

1. Provide a regulated ±15 VDC supply.
2. Verify the supply polarity and voltage tolerance.
3. Connect the 15-pin D-sub interface securely.
4. Connect the analog output to an input rated for 0 to +10 VDC.
5. Ensure the receiving input impedance exceeds 10 kΩ.

Thermal Startup

1. Power the unit and allow the heater to reach its controlled temperature.
2. Allow up to four hours for warm-up.
3. Observe the At Temperature and Heater Failure indicators.
4. Verify the zero-pressure baseline under suitable reference conditions.
5. Compare the output against a calibrated pressure reference.

Do not begin production measurement before thermal stabilization. Follow the equipment manufacturer's approved startup and calibration procedures.

08 | Maintenance & Field Troubleshooting

Zero Reading Drift

Check ambient temperature changes and thermal stabilization first. Review the installation airflow and verify the zero reference. Compare the reading against a suitable calibration standard.

Heater Failure Indicator

Inspect the power supply and electrical connections. Confirm that the unit receives the specified bipolar voltage. Follow the manufacturer's service procedure if the heater fault persists.

Unstable Analog Output

Check the receiving input impedance and signal wiring. Inspect the grounding arrangement and electrical noise sources. Verify the analog input scaling before changing calibration settings.

Unexpected Pressure Deviation

Check for process-line restrictions, fitting leakage, and pressure reference errors. Confirm the instrument range and applied pressure conditions. Use a calibrated reference instrument to isolate sensor-related deviations.

09 | Typical Semiconductor Applications

• CVD Equipment: Monitors absolute pressure in chemical vapor deposition systems.
• Etching Systems: Supports pressure measurement in process chambers and gas handling equipment.
• Diffusion Furnaces: Provides pressure feedback for controlled thermal processing environments.
• Thin-Film Deposition: Supports pressure monitoring during material deposition.
• Gas Delivery Systems: Measures pressure in semiconductor process gas assemblies.

The heated sensing architecture suits applications that require elevated sensor temperatures. Engineers should verify process compatibility, installation temperature, and pressure conditions for each application.

10 | Compliance & Documentation

• CE Compliance: Specified as CE compliant.
• Electrical Documentation: Verify the applicable connection and supply requirements.
• Technical Verification: Confirm the exact model configuration against the manufacturer's documentation.

11 | Package Contents & Order Verification

Verify the following items against the confirmed purchase specification:

• 1 × MKS Instruments 631F13TBFP pressure transducer.
• Product identification and model information.
• Applicable technical documentation, subject to order confirmation.

Power cables, connector cables, mounting hardware, and additional fittings require separate confirmation. The unit specification lists no integrated relay outputs.

12 | Professional FAQ: Application Engineering & Selection

Q1: Why does a heated pressure transducer require a longer startup period?

The internal sensing assembly must reach its controlled thermal condition. Temperature stabilization helps establish consistent measurement characteristics. Allow up to four hours before evaluating the specified performance.

Q2: How should engineers evaluate the 0.50% reading accuracy at different pressure levels?

Calculate the expected absolute error from the actual pressure reading. For example, at 500 Torr, 0.50% of reading corresponds to 2.5 Torr. This differs from accuracy specifications based on full scale.

Q3: What happens if the PLC analog input has an impedance below 10 kΩ?

The receiving load may fall outside the specified output conditions. This can affect signal accuracy and electrical performance. Select an analog input with impedance greater than 10 kΩ.

Q4: Why is ambient airflow important even though the sensor operates at 200°C?

The heated sensing assembly still requires proper thermal management. Elevated ambient temperatures can increase heat accumulation around the instrument body. Maintain at least 150 ft/min airflow when the ambient temperature reaches 40–50°C.

Q5: What should procurement teams check when replacing an existing 600 Series Baratron?

Compare the full-scale range, process fitting, wetted materials, electrical connector, and output requirements. Also check the controlled sensor temperature and physical dimensions. Matching the series name alone does not establish complete interchangeability.

Technical Sourcing | MKS Instruments 631F13TBFP

Global PLC Spare HUB supports industrial instrumentation sourcing and model verification for semiconductor equipment users.

• Technical Verification: Assistance with model, range, and interface identification.
• Application Support: Guidance on pressure connections and electrical compatibility.
• Warranty: 12-month warranty under confirmed sales terms.
• International Shipping: FedEx, UPS, and DHL options.
• Dispatch Arrangement: Typically 24–48 hours, subject to stock confirmation and order processing.

Request Your 631F13TBFP Quotation

Need the MKS Instruments 631F13TBFP for a heated semiconductor pressure measurement application? Contact our team with your required quantity and technical specifications. We can assist with model verification and quotation support.

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