MKS 626B11TQE Baratron Capacitance Manometer 10 Torr Pressure Sensor

Product Overview

The MKS Instruments 626B Baratron series delivers reliable absolute pressure measurements in demanding processing environments.

The 626B11TQE ambient-temperature capacitance diaphragm gauge measures total pressure independently of gas composition.

Engineers rely on the MKS 626B Baratron family for precise vacuum measurement across critical industrial processes.

This transducer features robust Inconel wetted materials and an analog output signal for seamless control system integration.

Technical Specifications

Installation Guide

• Mount the 626B11TQE gauge vertically on the NW25-KF process connection to minimize particle contamination.
• Use an approved centering ring with an elastomer O-ring to secure vacuum tightness.
• Connect the 15-pin D-sub cable before applying ±15 VDC power to avoid voltage spikes.
• Ensure proper grounding of the overall metal braided cable shield at both terminal ends.
• Allow a 15-minute warm-up period prior to taking official process measurements.

Commissioning & Maintenance Convenience

• Zero adjustments are easily accessible on the top panel of the sensor unit.
• Routine calibration checks require minimal downtime due to stable sensor geometry.
• Solid-state electronics reduce periodic mechanical maintenance requirements in clean processes.

System Compatibility

• Compatible with standard MKS power supplies, signal conditioners, and display units.
• Integrates into generic PLC host systems via standard 0-10 VDC analog input modules.
• Fits industry-standard NW25-KF vacuum flanges across various processing equipment lines.

Certifications & Standards

• CE Mark: Compliant with EMC Directive 2004/108/EC.
• RoHS Compliance: Meets Directive 2002/95/EC safety standards.

Package Contents & Standard Warranty

• 1 × MKS 626B11TQE Baratron Capacitance Manometer
• Protective flange cap and factory inspection document
• 12-Month Comprehensive Warranty Coverage included with all units

Global Logistics & Express Shipping

• Fast Dispatch: Ships within 24 to 48 hours from our central warehouse.
• Global Carriers: Expedited delivery via DHL, FedEx, and UPS.
• Secure Packaging: Anti-static and cushioned packaging prevents transit damage.

Typical Application Scenarios

• Semiconductor wafer processing chambers requiring exact low-pressure monitoring.
• Thin-film physical vapor deposition (PVD) and chemical vapor deposition (CVD) equipment.
• Industrial freeze-drying units and vacuum heat-treating furnaces.
• Analytical instrument calibration manifolds and mass spectrometer foreline tracking.

Diagnostic Capabilities

• Continuous zero-drift tracking identifies sensor contamination early during idle process steps.
• Output signal monitoring reveals chamber pressure fluctuations or vacuum pump degradation.
• Power rail voltage verification prevents signal noise from improper external power delivery.

Global PLC Spare HUB's Insight

In semiconductor vacuum processing, sensor zero stability determines accurate thin-film layer thickness.

Field data shows that unshielded cabling near high-frequency RF plasma generators causes signal noise.

Installing double-shielded metal braided cables on the 626B11TQE eliminates RF interference completely.

We recommend verifying zero calibration under ultimate vacuum (<1 × 10−5 Torr) before starting process runs.

Selection & Purchasing Guide

• Determine Range: Choose 10 Torr (11T) for low-vacuum monitoring down to 5 × 10−3 Torr.
• Verify Fittings: Confirm NW25-KF (Q) matches your chamber port size before ordering.
• Check Power Requirements: Ensure your control panel provides dual ±15 VDC power rails.

Frequently Asked Questions (FAQ)

Q1: What is the lowest suggested pressure reading for the 626B11TQE gauge?

The lowest suggested pressure for accurate reading is 5 × 10−3 Torr, and 5 × 10−2 Torr for active pressure control.

Q2: Does the gas composition affect the pressure reading on the 626B Baratron?

No, capacitance diaphragm gauges measure mechanical deflection, making readings independent of gas type.

Q3: What cable type should engineers use with this pressure transducer?

Engineers must use an overall metal braided shielded cable grounded at both ends to comply with CE EMC standards.

Q4: What should field technicians check if the gauge output drifts during initial startup?

Technicians should verify the 15-minute warm-up completion and inspect ambient room temperature stability.

Q5: Can the 626B11TQE withstand exposure to atmospheric pressure?

Yes, the internal Inconel diaphragm tolerates overpressure limits up to 45 psia without suffering permanent damage.

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