Description
1. Unboxing & Physical Snapshot
- Model & Brand: MKS Instruments — 220DD-00100D2B (Baratron Type 220DD Heated Differential Capacitance Manometer)
- Physical Dimensions: Rugged NEMA 1 enclosure featuring industrial process fittings and a circular electrical connector interface.
- Estimated Shipping Weight: 2.2 kg (4.85 lbs) packed in high-density anti-static foam and custom-molded corrugated cartons.
- What’s in the Box: 220DD pressure transducer unit, factory calibration certificate insert, electrical mating connector kit, and hardware instruction bulletin (note: mounting brackets and signal cables are sold separately).
2. Product Introduction
Measuring extremely low differential pressures across harsh industrial or research vacuum environments requires high-precision instrumentation that remains unaffected by gas composition shifts. Operating as a temperature-controlled differential capacitance manometer, the MKS Type 220DD utilizes a tensioned Inconel metal diaphragm that deflects under pressure changes, generating a precise capacitance variation (—which is then converted into highly linear, high-level DC voltage and current outputs).
Engineered with internal 45°C thermal control loops to eliminate zero and span drift, the unit delivers an exceptional accuracy of \pm0.15\% of reading. Process control engineers and instrumentation specialists rely on this specific 100 Torr model to ensure absolute measurement stability in critical semiconductor, chemical, and aerodynamic testing loops.
3. Core Technical Specifications
| Parameter | Value |
| Product Series | MKS Baratron Type 220DD Heated Differential Manometer |
| Full Scale Range | 100 Torr (-00100) |
| Sensor Temperature | Internally temperature-controlled to 45^\circC |
| Accuracy | \pm0.15\% of Reading (including temperature coefficients) |
| Analog Outputs | 0 to 10 VDC and 4 to 20 mA simultaneous outputs |
| Input Power Requirements | 115/230 VAC, 50/60 Hz |
| Wetted Materials | Px Side: Inconel; Pr Side: Inconel, Ceramic, Palladium, Stainless Steel, Glass |
| Operating Temperature | +5^\circC to +40^\circC (41^\circF to 104^\circF) |
| Enclosure Rating | NEMA 1 industrial rugged housing |
4. Global Compliance & Industry Certifications
Regulatory quality audits require strict verification of calibration standards and electrical safety compliance for high-precision vacuum instruments.
- Certifications: CE Mark (EMC and Low Voltage directives), RoHS compliant, and manufactured under ISO 9001 quality frameworks.
- Safety Relevance: The NEMA 1 rugged housing and built-in electrical isolation protect internal circuitry against industrial noise interference and minor particulate ingress, ensuring stable signal transmission to control systems.
- Audit Note: Maintain annual factory calibration records to satisfy quality assurance and traceability mandates for process instrumentation.
5. Long-Term Storage & Asset Preservation Guide
Spare capacitance manometers stored in warehouse stockrooms require careful handling to prevent mechanical shock to the internal sensitive diaphragm and thermal controller assembly. Preserve your inventory by executing these procedures:
- Maintain indoor warehouse climates where ambient storage temperatures stay between -20^\circC and +60^\circC while keeping relative humidity strictly below 80% non-condensing.
- Keep the sensor sealed inside its original factory anti-static barrier bag with port dust plugs tightly installed until the exact installation window.
- Avoid dropping or subjecting the housing to mechanical impacts, as shock forces can permanently offset the ultra-sensitive internal capacitance gap.
6. Physical Installation Prerequisites
Proper mechanical alignment, thermal stabilization time, and clean process connections are critical for accurate differential measurement.
- Warm-Up Time: Allow the unit at least 2 to 4 hours of warm-up power after initial installation to let the internal 45°C heater stabilize zero and span baselines.
- Mounting Orientation: Mount the sensor in a vertical position whenever possible to minimize thermal gradients and gravity-induced zero offsets on low-range diaphragms.
- Port Connection: Ensure clean, leak-free process line connections using appropriate fittings to prevent zero drift caused by micro-leaks on either the Px or Pr reference ports.
7. Buyer’s FAQ (Logistics & Compliance Focus)
Q: What Harmonized System (HS) Tariff Code applies to this MKS Baratron for international shipments?
A: Industrial pressure measuring instruments and electronic manometers typically classify under HS code 9026.20.4000 (Instruments for measuring or checking pressure: Electrical). Always verify final classifications with your customs broker.
Q: What does the “-00100” portion of the part number signify?
A: It designates the full-scale pressure range of the instrument, which in this case is 100 Torr.
Q: What is the Country of Origin (COO) for trade compliance record-keeping?
A: MKS Baratron instruments are manufactured in the United States, requiring accurate country declarations on commercial import paperwork.
Q: Is specialized transit insurance required for international cargo delivery?
A: Yes, because precision metal diaphragms and internal electronic temperature controllers are sensitive to severe shipping vibration and drop impacts, full-value freight insurance is strongly recommended.
