626B01TAE MKS Type 626B Baratron Precision 1 Torr Capacitance Manometer

MKS 626B01TAE | Type 626B Baratron 1 Torr Capacitance Manometer

The MKS 626B01TAE is an absolute pressure transducer from the MKS Type 626B Baratron series. It uses capacitance diaphragm technology to measure vacuum pressure independently of gas composition, within its specified operating conditions.

This configuration provides a 1 Torr full-scale range and a 15-pin male D-subminiature electrical connector. Its analog output delivers 0 to +10 VDC into a load of at least 10 kΩ.

The sensor supports low-pressure process monitoring and vacuum control applications. Its specified accuracy is ±0.25% of reading, including non-linearity, hysteresis and non-repeatability.

01 | Configuration Breakdown — Decode the Ordering Code

Ordering Code: 626B01TAE

Use the following breakdown to identify the main configuration elements. The code interpretation below follows the supplied ordering information.

• 626B
  • Product family: Type 626B Baratron
  • Electrical connection: 15-pin male D-subminiature connector
• 01T
  • Full-scale pressure range: 1 Torr
  • Range code: 01T
• A
  • Fitting configuration: 1/2-inch (12.7 mm) tubulation
  • Fittings code: A
• E
  • Accuracy code: E
  • Accuracy: ±0.25% of reading
  • Includes non-linearity, hysteresis and non-repeatability

Ordering identification: 626B01TAE combines the Type 626B platform, 1 Torr range, 1/2-inch tubulation and accuracy code E. Confirm the complete code against the instrument nameplate before ordering.

02 | Measurement Performance and Electrical Specifications

03 | Low-Pressure Measurement and Temperature Stability

The usable measurement range and suggested operating limits serve different purposes. The 1 × 10⁻⁴ F.S. specification describes the usable measurement range. The suggested pressure limits provide more conservative guidance for reading and process control.

For stable low-pressure operation, allow the specified 15-minute warm-up period. Avoid comparing measurements before the instrument reaches thermal stability.

04 | Mechanical Construction and Wetted Materials

• Fitting style: 1/2-inch (12.7 mm) tubulation.
• Wetted materials: Inconel and Incoloy.
• Optional fitting materials: Some configurations use 300-series stainless steel.
• Pressure sensing principle: Capacitance diaphragm.
• Pressure reference: Absolute pressure measurement.

Wetted material selection matters when the gauge contacts corrosive or process-specific gases. Confirm the exact material configuration before installation. Do not assume every optional fitting uses the same alloy as the standard sensor assembly.

05 | Installation, Cabling and Commissioning

1. Verify the connection: Confirm the 15-pin male D-subminiature connector and the mating cable configuration.
2. Check the supply: Provide ±15 VDC within the specified ±5% tolerance.
3. Prepare the output circuit: Connect the 0 to +10 VDC output to an input with at least 10 kΩ impedance.
4. Install the cable correctly: Use an overall metal-braided shielded cable.
5. Ground the shield: Ground the cable shield at both ends as specified.
6. Allow warm-up: Wait at least 15 minutes before evaluating measurement stability.
7. Check pressure conditions: Confirm the process pressure stays within the sensor's permitted operating conditions.

Important cabling note: Shield termination is part of the measurement installation. Incorrect shielding or grounding can introduce electrical noise into the analog signal.

06 | Engineering Applications and Selection Considerations

The 1 Torr configuration suits vacuum systems that require sensitive pressure measurement over a low-pressure range. Typical application areas include:

• Vacuum chamber pressure monitoring.
• Semiconductor process equipment.
• Vacuum deposition and thin-film systems.
• Laboratory vacuum instrumentation.
• Process pressure feedback and vacuum control loops.

When selecting a replacement, compare the full-scale range, fitting, electrical connector, output signal, supply voltage and accuracy. A matching series name alone does not establish electrical or mechanical interchangeability.

07 | Related Model Comparison: 626B01TAE vs. 626B52TEE

The following comparison helps engineers distinguish the 1 Torr configuration from the 500 Torr model. The linked model is a separate product listing.

Technical selection advice: Choose the 1 Torr model when the target pressure is low and measurement resolution is the priority. Choose the 500 Torr model when the process pressure requires a wider measurement range.

Do not select a 500 Torr gauge simply because its range is larger. A higher full-scale range can reduce the useful signal span for low-pressure measurements. Conversely, a 1 Torr gauge may not suit a process that regularly approaches or exceeds its measurement range.

Before replacing either model, verify the complete ordering code, connector pinout, fitting dimensions, output scaling, power requirements and wetted materials. Confirm the 626B52TEE's detailed configuration against its product documentation rather than assuming every suffix option matches the 626B01TAE.

08 | Product Quality, Warranty and Shipping

• Warranty: 12-month warranty.
• Shipping methods: FedEx, UPS and DHL.
• Product identification: Confirm the complete model and ordering code before dispatch.
• Technical support: Contact us for configuration checks and replacement assistance.

09 | Frequently Asked Questions

Q1: Why does a 1 Torr gauge need a separate pressure limit for control applications?

Control loops need dependable feedback, not merely a detectable signal. The suggested control threshold is 5 × 10⁻³ Torr, which is higher than the suggested reading threshold. Use this distinction when defining process control limits.

Q2: Can a PLC analog input read the sensor's output directly?

Yes, if the input accepts a 0 to +10 VDC signal and presents a load impedance of at least 10 kΩ. Check the PLC input range, grounding arrangement and signal scaling before commissioning.

Q3: What happens if the cable shield connects at only one end?

The specified installation requires an overall metal-braided shield grounded at both ends. A different termination arrangement may increase noise susceptibility or create grounding problems. Follow the instrument's installation instructions and evaluate the complete grounding system.

Q4: When should engineers investigate a drifting zero reading?

First check warm-up time, ambient temperature changes, supply voltage and cable shielding. Then inspect the pressure connection for leaks or contamination. Compare the observed drift with the specified zero temperature coefficient before suspecting sensor failure.

Q5: What information should buyers provide when sourcing a replacement Baratron gauge?

Provide the complete model code, full-scale range, fitting type, connector type, output signal and supply voltage. Also confirm wetted materials and process gas compatibility. These details reduce the risk of ordering a mechanically fitting but electrically unsuitable replacement.

10 | Ordering and Technical Support

Request the MKS 626B01TAE Type 626B Baratron 1 Torr capacitance manometer by its complete ordering code. Include the equipment model and installation requirements when requesting a replacement.

Contact us for pricing, availability and technical assistance. Our team can help review the configuration and arrange shipping through FedEx, UPS or DHL.

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