MKS 626B13TDE 1000 Torr NW16-KF 626B Baratron Vacuum Gauge Sensor

Product Overview: MKS 626B13TDE Baratron® Absolute Pressure Transducer

The MKS 626B13TDE belongs to the renowned MKS 626B Baratron® series of ambient-temperature capacitance manometers. This high-precision gauge measures absolute vacuum pressure independently of gas composition, ensuring consistent, repeatable readings across critical industrial processes.

Engineered with all-Inconel® wetted surfaces, the MKS 626B13TDE delivers outstanding corrosion resistance and exceptional thermal stability. Its integrated signal conditioner operates on a standard ±15 VDC power supply, providing a linear 0 to +10 VDC output signal for accurate system integration.

Technical Specifications

• Brand: MKS Instruments
• Model / Ordering Code: 626B13TDE
• Product Series: MKS 626B Baratron® Series
• Measurement Range (Full Scale): 1000 Torr (1 x 10⁻⁴ F.S. usable resolution)
• Fitting / Process Connection: NW16-KF flange
• Accuracy Standard: 0.25% of Reading
• Electrical Connector: 15-pin male D-subminiature
• Output Signal: 0 to +10 VDC into 10k ohm load
• Power Supply Required: ±15 VDC (±5%) @ 35 mA maximum
• Ripple & Noise: <20 mV peak-to-peak
• Time Constant (Frequency Response): <20 msec
• Operating Temperature Range: 0°C to 50°C (32°F to 122°F)
• Zero Temperature Coefficient: 0.005% F.S./°C
• Span Temperature Coefficient: 0.04% Reading/°C
• Overpressure Limit: 45 psia (310 kPa) without damage
• Wetted Materials: Inconel® and Incoloy®
• Internal Cavity Volume (Px side): 6.3 cc
• Compliance & Standards: CE (EMC Directive 2004/108/EC), RoHS (Directive 2002/95/EC)

System Architecture & Functional Performance (MECE Framework)

1. Electrical & Signal Processing

• Input power requirements remain strictly ±15 VDC (±5%) at 35 mA both at startup and post-warmup.
• Integrated electronics generate a smooth 0 to +10 VDC analog output proportional to absolute pressure.
• Shielded 15-pin D-sub connectors reject industrial electro-magnetic interference (EMI) effectively.

2. Mechanical & Material Construction

• Inconel® diaphragm construction isolates internal sensing components from corrosive processing media.
• Standard NW16-KF vacuum fitting ensures tight, reliable sealing in high-vacuum piping networks.
• Compact 6.3 cc internal volume minimizes gas displacement and speeds up response times.

3. Thermal & Environmental Tolerances

• Operating ambient temperature envelope spans from 0°C to 50°C for this 1000 Torr model.
• Low temperature coefficients maintain precise zero stability during ambient temperature swings.
• Mechanical burst threshold tolerates positive pressure spikes up to 45 psia safely.

Installation Guide & Wiring Protocols

• Mount the unit in any orientation; vertical mounting with fitting pointing down prevents particulate accumulation.
• Ensure process lines are properly vented before clamping the NW16-KF connection with standard centering rings.
• Connect standard shielded cable to the 15-pin D-sub male connector to minimize signal noise.
• Verify ±15 VDC power supply voltage tolerance (±5%) before turning on the power source.
• Allow at least 1 hour of warm-up time at 25°C for maximum measurement repeatability.

Commissioning, Maintenance & Diagnostic Features

• Perform initial zero adjustment only after pumping the system below the usable resolution limit (10⁻⁴ F.S.).
• Access zero adjustment trimpots directly on the transducer enclosure during routine calibration cycles.
• Check power rails across pins if output voltage stays fixed near 0 V or above 10 V continuously.
• Inspect internal chamber for contamination if zero drift exceeds standard drift tolerances over time.

System Compatibility & Industry Applications

The MKS 626B13TDE integrates seamlessly into vacuum controller systems, PLC analog input cards, and automated process chambers requiring standard 0-10 VDC inputs. Typical deployment environments include:

• Semiconductor wafer processing and thin-film deposition chambers.
• Vacuum furnaces, metallurgical heat treatment systems, and industrial vacuum coating tools.
• Pharmaceutical freeze drying (lyophilization) equipment and analytical instrumentation.
• General industrial vacuum monitoring across process gas handling lines.

Commercial Terms & Delivery Details

• Warranty: Complete 12-Month Comprehensive Warranty.
• Dispatch Time: Fast shipping within 24 to 48 hours from stock confirmation.
• Express Couriers: Express global shipping via FedEx, UPS, and DHL.
• Package Contents: 1x MKS 626B13TDE Vacuum Transducer, factory protective caps, and calibration documentation.

Global PLC Spare HUB Insight & Field Experience

In our field automation work, capacitance manometers like the MKS 626B13TDE offer clear advantages over Pirani or thermal conductivity gauges. PIRANI sensors depend on gas thermal conductivity, while the MKS 626B measures true physical diaphragm deflection. This design gives you true gas-independent pressure readings regardless of whether you process Argon, Nitrogen, or reactive gases.

Field Maintenance Example: On a recent vacuum furnace project, a client reported signal drift during high-temperature cycles. Our engineering team identified dirty power supply lines as the cause. Adding a clean ±15 VDC supply with <20 mV ripple restored the gauge's 0.25% reading accuracy instantly. We recommend checking power quality before re-calibrating zero offsets on the MKS 626B13TDE.

Selection Guide: Decoding the MKS 626B Part Number

Understanding the part code structure helps ensure correct spare part selection:

• Type Designator (626B): Represents the model featuring a 15-pin male D-subminiature connector.
• Full Scale Range (13T): Specifies a 1000 Torr full scale measurement range.
• Fitting Code (D): Designates standard NW16-KF vacuum fitting.
• Accuracy Code (E): Indicates standard 0.25% of Reading accuracy specification.

Frequently Asked Questions (FAQ)

Q1: What does the gas-independent measurement feature mean for my process?

It means the transducer measures actual physical force on the Inconel® diaphragm. You get precise pressure readings without applying correction factors for different process gases.

Q2: Can I substitute the MKS 626B13TDE for a 622B model?

The internal sensing technology is identical, but the 622B uses a 5-post terminal block while the MKS 626B uses a 15-pin D-sub connector. Cable wiring adjustments are required.

Q3: How long should I let the unit warm up before relying on readings?

We recommend allowing 1 hour of continuous power supply at ambient temperature to achieve complete thermal equilibrium and optimal accuracy.

Q4: How do I verify if the transducer output signal is accurate?

Pump down the vacuum chamber well below 0.1 Torr (10⁻⁴ F.S.) and check the DC output voltage across the signal pins. The voltage should read exactly 0.000 VDC.

Q5: What happens if the process pressure spikes above 1000 Torr?

The unit features an overpressure limit of 45 psia (310 kPa). Spikes up to this threshold will not damage the internal diaphragm or ruin calibration.

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