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3. Key Technical Specifications
| Parameter | Specification / Value |
| Manufacturer | MKS Instruments |
| Part Number | 220DD-00100A2B |
| Pressure Range | 100 Torr (Full Scale) |
| Measurement Type | Differential Pressure |
| Accuracy | 0.15% of Reading |
| Output Signal | 0 to 10 VDC Linear |
| Input Power | ±15 VDC (±5% at 35 mA) |
| Operating Temperature | 15°C to 40°C (59°F to 104°F) |
| Fittings / Ports | 0.5 in. (12.7 mm) OD Tube Stubs |
| Wetted Materials | Inconel and 316L Stainless Steel |
| Packaging | Sealed Protective Anti-Static Shielding |
4. Product Introduction & Supply Chain Strategy
This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules undergo rigorous quality verification to ensure OEM-level reliability. The MKS Instruments 220DD-00100A2B Baratron capacitance manometer provides gas-independent differential pressure monitoring across semiconductor tool vacuum lines, chemical vapor deposition systems, and process chamber exhaust networks.
Stocking this precision transducer as New Surplus prevents severe production downtime during tool faults. MKS factory lead times for legacy 220D series manometers often extend past 16 weeks, leaving critical process lines exposed to costly halts. Refurbished capacitance manometers pose significant operational hazards, such as diaphragm memory drift, zero-point instability, and outgassing contamination. Purchasing genuine New Surplus ensures factory-grade calibration, long-term stability, and a lower Total Cost of Ownership (TCO) than active list pricing.
5. Installation & Configuration Guide
Stage 1: Pre-Installation (Prep & Safety)
- Implement full Lock-Out/Tag-Out (LOTO) procedures on host vacuum pumps and isolate the process line.
- Put on cleanroom-compliant nitrile gloves to avoid transferring oils to the tube stubs or mating fittings.
- Inspect the new 220DD-00100A2B unit to ensure protective end caps are intact and seal faces are free of debris.
Stage 2: Removal
- Disconnect the multi-pin signal interface cable from the transducer housing; do not pull by the wiring harness.
- Vent both high-pressure and low-pressure sides of the differential sensor to atmospheric pressure safely.
- Unfasten compression fittings or Swagelok connections carefully, pulling the sensor straight back without torqueing the process lines.
Stage 3: Installation (Clone & Seat)
- Mount the 220DD-00100A2B transducer in the same orientation as the original unit to preserve zero calibration alignment.
- Connect the high-side and low-side process lines to the designated port stubs using fresh ferrule sets or vacuum couplings.
- Tighten fitting nuts according to manufacturer torque standards to establish a leak-tight seal.
Stage 4: Power-On & Testing
- Reattach the 0-10 VDC signal interface cable to the connector port.
- Supply ±15 VDC power to the sensor and allow a 30-minute thermal warmup cycle for the internal electronics to stabilize.
- Evacuate both sides to base vacuum and adjust the front-panel zero potentiometer until the signal output reads exactly 0.000 VDC.
220DD-00100A2B
220DD-00100A2B
1.Process isolation & inspection:Pre-Installation & Setup.
Apply LOTO procedures to host vacuum lines. Wear clean nitrile gloves and inspect the 220DD-00100A2B tube stubs and protective shipping caps before installation.
2.Depressurization & disconnect:Transducer Removal.
Unplug the interface cable. Vent local vacuum lines to atmospheric pressure and unfasten compression fittings without stressing adjacent process tubing.
3.Mechanical mounting:Hardware Alignment & Seating.
Align the new MKS unit in the correct physical orientation. Secure the differential port fittings using fresh compression seals to ensure zero vacuum leakage.
4.Warmup & zero adjustment:Validation & Calibration Check.
Connect signal cabling and energize the ±15 VDC supply. Allow 30 minutes of thermal stabilization under base vacuum, then adjust zero offset to 0.000 VDC.
6. Firmware/Software Versions & Upgrade Notes
- Signal Compatibility: The 220DD-00100A2B operates via pure analog 0-10 VDC output and does not require software firmware upgrades.
- Controller Interface: Fully compatible with MKS 600-series displays, PDR2000 readouts, and standard 16-bit analog PLC I/O cards.
- Calibration Warning: Never attempt to adjust internal span potentiometers during routine maintenance. Span calibration requires a certified primary pressure standard. Field adjustments should be limited strictly to zero-offset adjustments at base vacuum.
7. Frequently Asked Questions (FAQ)
Q: Is this MKS 220DD-00100A2B transducer new or refurbished?
A: This unit is 100% Genuine New Surplus. It has never been installed on an active process tool, features clean process ports, and ships in protective ESD packaging.
Q: Why should I choose New Surplus over a refurbished capacitance manometer?
A: Refurbished manometers frequently suffer from metal fatigue on the internal Inconel diaphragm and baseline calibration drift. In semiconductor and vacuum coating processes, inaccurate differential pressure measurement damages wafer yield. New Surplus guarantees factory-level accuracy and zero contamination risk.
Q: Does this transducer measure absolute or differential pressure?
A: The 220DD-00100A2B is a true differential capacitance manometer, designed to measure the pressure difference between its two process ports up to a 100 Torr full-scale range.
Q: Why is a warmup period required after applying power?
A: Capacitance manometers utilize precision signal-conditioning circuitry. Allowing a 30-minute warmup permits the internal electronics to reach thermal equilibrium, ensuring accurate and repeatable 0-10 VDC readings.
Q: What warranty coverage comes with this unit?
A: We back this MKS 220DD-00100A2B transducer with a full 1-year replacement warranty, delivering total operational security compared to typical short-term used-part guarantees.
