629H11TDCJ4B MKS 629H Absolute Pressure Transducer 10 Torr Measurement

MKS Instruments 629H11TDCJ4B | 45°C Heated Baratron Pressure Transducer

The MKS Instruments 629H11TDCJ4B is a heated absolute pressure transducer from the 629H family within the MKS 600 Series. It uses Baratron® capacitance manometer technology for precision low-pressure measurement.

This configuration provides a 10 Torr full-scale range and maintains the sensor temperature at 45°C. Its heated measurement structure helps reduce thermal variation during pressure monitoring.

The instrument features an NW16 ISO-KF process connection, a 9-pin D-sub electrical interface, and an external zero input. A dedicated heater status LED provides a convenient indication of heater operation.

Unlike relay-equipped pressure transducers, this model uses an analog output architecture without trip relays. Its 0–10 VDC output supports integration with compatible industrial measurement systems.

01 | Product Configuration at a Glance

Manufacturer	MKS Instruments
Model	629H11TDCJ4B
Product Family	MKS 629H
Series	600 Series
Product Type	Heated Baratron Absolute Pressure Transducer
Measurement Principle	Capacitance manometer
Measurement Reference	Absolute pressure
Full-Scale Range	10 Torr
Controlled Sensor Temperature	45°C
Process Connection	NW16 ISO-KF
Electrical Interface	9-pin D-sub with threaded locks
Zero Adjustment	External zero input
Heater Indicator	Heater status LED
Trip Relays	Not included
Compliance	CE compliant

02 | Model Number Decoding & Configuration Breakdown

The ordering code identifies the instrument family and its configuration options. The following breakdown separates supplied specifications from code interpretations that require manufacturer confirmation.

Code Segment	Configuration Description	Technical Interpretation
629H	Product Family	45°C heated Baratron pressure transducer with heater status indication.
11T	Measurement Range	10 Torr full-scale configuration.
D	Process Fitting	Exact fitting code requires confirmation against the manufacturer ordering table. Supplied configuration specifies NW16 ISO-KF.
C	Configuration Option	Configuration suffix. Confirm the exact option definition with MKS documentation.
J	Electrical Interface	Supplied configuration specifies a 9-pin D-sub connector.
4	Analog Output	Supplied electrical specification identifies 0–10 VDC output.
B	Factory Configuration	Final ordering suffix. Confirm its calibration and factory option definition with MKS.

Configuration Verification: The complete model number should be used when requesting quotations or replacement equipment. Do not determine mechanical or electrical compatibility from individual suffix letters alone.

03 | Measurement Accuracy & Resolution Profile

Measurement Parameter	Specified Value
Pressure Type	Absolute
Full-Scale Range	10 Torr
Accuracy	0.12% of Reading
Accuracy Components	Includes non-linearity, hysteresis, and non-repeatability
Resolution	0.001% F.S.
Warm-Up Time	2 hours
Overpressure Limit	45 psia (310 kPa) or 120% F.S., whichever is greater
Internal Volume	6.3 cc

Resolution Calculation: At 10 Torr full scale, 0.001% F.S. corresponds to 0.0001 Torr.

The 0.12% of Reading accuracy specification includes the stated measurement error components. Engineers should distinguish reading-based accuracy from full-scale accuracy when evaluating low-pressure performance.

04 | Thermal Regulation & Environmental Conditions

The 629H architecture maintains the sensor at a controlled temperature of 45°C. This heated design supports stable pressure measurement under changing ambient conditions.

Sensor Temperature	45°C controlled
Operating Ambient Temperature	15 to 40°C
Zero Temperature Coefficient	0.002% F.S./°C
Span Temperature Coefficient	0.02% of Reading/°C
Warm-Up Requirement	2 hours
Heater Monitoring	Dedicated status LED

• Maintain ambient temperature within the specified operating range.
• Allow the sensor to complete its warm-up cycle before critical measurements.
• Monitor heater status during initial startup.
• Evaluate zero and span stability under consistent thermal conditions.

05 | Electrical Interface & Signal Transmission

Power Supply	±15 VDC (±5%)
Power Consumption	0.25 A
Analog Output	0 to +10 VDC
Output Load	Greater than 10 kΩ
Connector	9-pin D-sub with threaded locks
External Zero Input	Supported
Heater Status LED	Provided
Alarm Relay	Not available

Signal Integration: The 0–10 VDC output provides a direct analog measurement signal. Connect it to a compatible PLC analog input, data acquisition system, or pressure monitoring controller.

The receiving input must provide an impedance greater than 10 kΩ. Verify the 9-pin connector pinout before wiring or replacement.

06 | Mechanical Construction & Process Connection

The instrument uses Inconel wetted components and an NW16 ISO-KF vacuum connection. Its compact housing supports integration into vacuum measurement assemblies.

Wetted Material	Inconel
Process Fitting	NW16 ISO-KF
Internal Volume	6.3 cc
Body Diameter	3.15 in (80.0 mm)
Body Height	3.87 in (98.4 mm)
Fitting Stem Length	1.38 in (35.1 mm)

Check available mounting clearance before installation. Ensure the NW16 flange, centering ring, and clamp arrangement match the vacuum system.

07 | Installation & Startup Workflow

Use the following engineering sequence to prepare the transducer for operation.

1. Mechanical Preparation: Verify the NW16 ISO-KF connection and sealing components.
2. Mounting: Install the instrument without imposing excessive mechanical stress.
3. Power Connection: Verify the ±15 VDC supply and electrical polarity.
4. Signal Wiring: Connect the 0–10 VDC output to a compatible measurement channel.
5. Zero Input: Check external zero wiring and follow the approved zeroing procedure.
6. Heater Inspection: Observe the heater status LED after power-up.
7. Thermal Stabilization: Allow approximately two hours for warm-up.
8. Measurement Verification: Compare the output against a suitable pressure reference.

08 | Maintenance & Troubleshooting Reference

Observed Condition	Recommended Inspection
Unstable Pressure Reading	Check thermal stabilization, supply pressure, and electrical grounding.
Zero Offset	Verify zero conditions and external zero input wiring.
No Analog Output	Inspect power supply, D-sub connections, and receiving input.
Heater Status Concern	Check the heater indicator and operating power conditions.
Unexpected Measurement Drift	Review ambient temperature and calibration history.
Vacuum Leakage	Inspect the NW16 flange, centering ring, and clamp assembly.

Perform zero checks under suitable reference conditions. Follow MKS service instructions for calibration and internal repairs.

09 | Application & System Compatibility

• Vacuum Measurement: Absolute pressure monitoring in vacuum equipment.
• Semiconductor Equipment: Pressure measurement in compatible process systems.
• Industrial Process Monitoring: Analog pressure feedback for automation equipment.
• Vacuum Control Systems: Integration with PLCs and data acquisition devices.
• Precision Pressure Monitoring: Applications requiring a 10 Torr measurement range.

Integration Requirements:

• Compatible ±15 VDC power supply.
• 0–10 VDC analog input with impedance above 10 kΩ.
• Correct 9-pin D-sub connector and pin assignment.
• Matching NW16 ISO-KF mechanical connection.
• Suitable ambient temperature and thermal stabilization conditions.

This model does not provide trip relays. Applications requiring independent hardware alarm contacts need an external alarm device or a different instrument configuration.

10 | Certification & Technical Compliance

• CE Status: CE compliant.
• Measurement Technology: Baratron capacitance manometer.
• Pressure Measurement: Absolute pressure.
• Sensor Construction: Heated Inconel wetted assembly.
• Electrical Interface: Analog 0–10 VDC.

Request the applicable manufacturer declaration when project specifications require formal compliance documentation.

11 | Packaging, Warranty & Shipping

• MKS Instruments 629H11TDCJ4B heated pressure transducer.
• Applicable product identification and manufacturer documentation, subject to supply configuration.
• Additional cables and installation accessories require separate confirmation.

Product Condition: New & Original in Factory Packing.

Warranty: Factory Warranty: 12 Months.

Shipping Methods: FedEx, UPS, and DHL.

Delivery Information: Contact our sales team for stock status, lead time, and international shipping arrangements.

12 | Global PLC Spare HUB | Technical Assessment

The MKS 629H11TDCJ4B is designed for applications requiring heated absolute pressure measurement with a compact vacuum interface.

Its 45°C thermal regulation, 0.12% of Reading accuracy, and 0.001% F.S. resolution define its measurement characteristics. The external zero input also provides a practical option for system-level zero adjustment.

For replacement projects, engineers should prioritize three checks: NW16 mechanical compatibility, 9-pin D-sub wiring, and analog signal scaling. The absence of built-in trip relays also matters when the existing system uses hardware alarm contacts.

13 | Engineering FAQ & Purchasing Guidance

1. Can this model replace a pressure sensor with a different connector?

Not without checking the electrical pin assignment and signal configuration. The 9-pin D-sub interface must match the receiving equipment. Verify power, analog output, and external zero connections before approving a substitute.

2. How should users handle zero adjustment in a vacuum system?

Establish the appropriate reference pressure before performing zero adjustment. Follow the manufacturer's external zero procedure. Avoid zeroing the instrument under an unknown residual pressure condition, as this can introduce a measurement offset.

3. Does the heater status LED confirm measurement accuracy?

No. The LED provides heater status information. It does not independently verify calibration or measurement accuracy. Use a suitable pressure reference when checking instrument performance.

4. What should purchasing teams verify when sourcing this exact configuration?

Check the complete ordering code, 10 Torr range, NW16 ISO-KF fitting, 9-pin connector, and external zero function. Request confirmation of the suffix configuration when replacing an existing installed unit. This reduces the risk of receiving a mechanically similar but electrically different model.

5. When should engineers choose a 45°C heated model instead of a higher-temperature version?

Evaluate the process vapor characteristics, required sensor temperature, ambient conditions, and system thermal design. A 45°C configuration suits applications requiring this specific controlled temperature. Higher-temperature models serve different thermal requirements and are not automatic substitutes.

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