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UE PRECISION E48W-H16K

Product Name: UE Precision E48W Series Absolute High Purity Pressure Switch
Product Introduction: The E48W-H16K​ is a factory-set, welded-sealed absolute pressure switch designed for high-purity gas systems and vacuum applications requiring SIL-rated safety integrity.
Category:
Description
Technical Specifications:
  • Pressure Type: Absolute​ (referenced to zero vacuum)
  • Set Point Range: 10 to 150 Torr​ (approx 1.33 to 20 kPa)
  • Deadband: 20 Torr + 5%​ of setting
  • Repeatability: ±5 Torr + 2%​ of setting
  • Internal Volume: 2.22 cc​
  • Proof Pressure: 15 psig​ (max)
  • Operating Temp: 0°F to 130°F​ (-18°C to 54°C)
  • Electrical: SPDT​ or Free Leads​ with D-sub mini connectors
  • Life Cycle: 5 Million operations​ minimum
  • Safety Integrity: SIL 3​ capable
    Functional Characteristics: Hermetically sealed snap-action contacts, tamper-proof factory calibration, secondary seal for added leak protection, welded diaphragm construction.
    Performance Parameters: Setpoint Stability: Unaffected by atmospheric pressure changes; Leak Rate: < 1×10⁻⁹ scc/s He​ (typical for welded version); Response Time: < 10 ms.
    Material Composition: Wetted Parts: 316L Stainless Steel​ (electropolished, Ra < 5 µin); Diaphragm: 316L SS​ welded; Housing: Epoxy-coated die-cast aluminum; Seals: Metal-to-metal weld or Kalrez​ (as specified).
    Structural Features: Compact in-line or manifold mount, 1/4″ end seal​ or NW25 flange​ connection, enclosed terminal compartment, RoHS/REACH compliant.
    Working Principle: An absolute reference vacuum capsule balances against the process pressure; at the setpoint, the diaphragm deflection overcomes spring tension, actuating the micro-switch via a snap-action mechanism to open/close electrical contacts.
    Advantages: Immune to barometric pressure shifts, ultra-clean design for semiconductor grade gases, high repeatability, certified functional safety.
    Applicable Industries: Semiconductor fabrication, Pharmaceutical high-purity skids, Aerospace test rigs, Vacuum coating systems, Biotechnology.
    Model Series: UE Precision E48W series.
    Installation Requirements: Install with minimal dead leg; support piping to avoid mechanical stress on 1/4″​ ports; torque fittings to 15–20 in-lb​ (SS); ensure electrical isolation if using D-sub.
    Usage Precautions: Do not adjust​ setpoint (factory sealed); ensure media is compatible with 316L SS; protect from condensation if operating near lower temp limits; verify SIL loop requirements before integration.
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