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Model WU-20, WU-25 & WU-26 Ultra-High-Purity Transducer

Brand: WIKA Alexander Wiegand SE & Co. KG
Reliable 
The WU-2x series combines state-of-the-art digital transducer concepts with Analog-like output signals, in order to provide the safest and most accurate pressure measurements necessary for today’s market requirements. 

Pressure measurement, based on a true vacuum reference, and electronic measures for interference shielding and signal noise cancellation ensure high-accuracy pressure measurement and excellent long-term stability. 

Active temperature compensation reduces the impact of changing temperatures on the transducer, allowing safe operations even in applications with high fluctuations in temperature, e.g. Joule-Thomson effect in the case of gas expansion. 

WU-25 (flow through) and WU-26 (surface mount) transducers are specifically designed to sustain torsion-applied stresses often incurred during installation. The special design of the thin-film sensor eliminates the risk of sensor failure due to loads at the process connection or welded joints. 

Versatile 
The WU-2x transducer can be readily installed in indoor or outdoor systems as well as in non-flammable or potentially flammable areas. The hermetically sealed design of the WU-2x prevents the ingress of humidity. 

Approvals for non-flammable and potentially flammable environments ensure a high level of product safety. Instruments for temperature class T6 meet the high requirements for low, spontaneous ignition temperature media (phosphine (PH3) and silane (SiH4)). 

Compact 
With its small footprint the WU-2x is the most compact UHP transducer in the market. Thus it is optimally suited for installation in applications with limited mounting space, and even in existing plants it can be easily retrofitted.
Features
  • High-accuracy pressure measurement 0.15% RSS
  • Excellent long-term stability
  • Signal noise shielding and cancellation
  • Active temperature compensation
  • ATEX zone 2 approval, FM class I div. 2 groups A, B, C, D
Reliable 
The WU-2x series combines state-of-the-art digital transducer concepts with Analog-like output signals, in order to provide the safest and most accurate pressure measurements necessary for today’s market requirements. 

Pressure measurement, based on a true vacuum reference, and electronic measures for interference shielding and signal noise cancellation ensure high-accuracy pressure measurement and excellent long-term stability. 

Active temperature compensation reduces the impact of changing temperatures on the transducer, allowing safe operations even in applications with high fluctuations in temperature, e.g. Joule-Thomson effect in the case of gas expansion. 

WU-25 (flow through) and WU-26 (surface mount) transducers are specifically designed to sustain torsion-applied stresses often incurred during installation. The special design of the thin-film sensor eliminates the risk of sensor failure due to loads at the process connection or welded joints. 

Versatile 
The WU-2x transducer can be readily installed in indoor or outdoor systems as well as in non-flammable or potentially flammable areas. The hermetically sealed design of the WU-2x prevents the ingress of humidity. 

Approvals for non-flammable and potentially flammable environments ensure a high level of product safety. Instruments for temperature class T6 meet the high requirements for low, spontaneous ignition temperature media (phosphine (PH3) and silane (SiH4)). 

Compact 
With its small footprint the WU-2x is the most compact UHP transducer in the market. Thus it is optimally suited for installation in applications with limited mounting space, and even in existing plants it can be easily retrofitted.
Features
  • High-accuracy pressure measurement 0.15% RSS
  • Excellent long-term stability
  • Signal noise shielding and cancellation
  • Active temperature compensation
  • ATEX zone 2 approval, FM class I div. 2 groups A, B, C, D

Specifications

Accuracy

  • ≤ 0.15 % of Span - RSS (Root Sum Squares)
  • ≤ 0.3 % of Span - Including Non-Linearity, Hysteresis, Zero Offset & End Value Deviation Per IEC 61298-2
  • ≤ 0.4 % of Span with Measuring Ranges ≤ 2 bar) - RSS (Root Sum Squares)
  • ≤ 0.6 % of Span with Measuring Ranges ≤ 2 bar Including Non-Linearity, Hysteresis, Zero Offset & End Value Deviation Per IEC 61298-2

Ambient Temperature Range

  • -20° to 85° C (-4° to 185° F)

Applications

  • Gas Panels for OEM Tools
  • Semiconductor, Flat Panel Display & Photovoltaic Industry
  • Special & Bulk-Gas Supply

Approvals & Certifications

  • ATEX - II 3 G Ex NA NL IIC T4/T5/T6 x (For Transducers with Ex Mark)
  • ATEX Directive - 94/9/EC
  • CE
  • EMC - 2004/108/EC, EN 61326-1, Emission (Group 1, Class B) & Interference Immunity (Industrial Application)
  • Ex
  • FM - Non-Flammable for use in Class I, Div. 2, Grade A, B, C, D & Class I, Zone 2, Group IIC, Hazardous Locations (Hazard Classes)
  • PED: 97/23/EC
  • RoHS Conformity (Not with Bayonet Connector)

Burst Pressure

  • psi: 1,740 to 10,440 (kPa: 12,000 to 72,000, bar: 120 to 720)

Electrical Connectors

  • Bayonet Connector, 4-Pin
  • Cable Outlet 1.5 m & 3 M
  • Circular Connector M12 x 1 (4-Pin)
  • Sub-D Connector, 9-Pin
  • Sub-D HD Connector (15-Pin)

Enclosure, Body Material

  • 304 Stainless Steel

Environmental Protection

  • IP54
  • IP66
  • IP67
  • NEMA 4

Flange Size - 1-1/8”

  • Flange Size - 1-1/8” MSM C

Hysteresis

  • ≤ 0.14 % of Span

Media

  • Liquids
  • Special Gas
  • Vapor

Output

  • 0-10 Vdc, 3-Wire
  • 0-5 Vdc, 3-Wire
  • 4-20 mA, 2-Wire

Overpressure & Static Pressure Limits

  • psi: 116 to 10,440 (kPa: 800 to 72,000, bar: 8 to 720)

Power Supply

  • 10-31 Vdc - Output Signal: 0-5 Vdc / 4-20 mA
  • 14-31 Vdc - Output Signal: 0-10 Vdc

Pressure Range

  • bar: 2 to 360
  • kPa: 200 to 36,000
  • psi: 30 to 5,000

Repeatability

  • Non-Repeatability: ≤ 0.12 % of Span

Response Time

  • ≤ 300 milliseconds

Shock

  • 500 G as Per IEC 60068-2-27

Span & Zero Adjustments

  • -2 to 3.5 % of Span (Voltage Output)
  • -3.5 to 3.5 % of Span (Current Output)

Storage Temperature

  • -40° to 100° C (-40° to 212° F)

Temperature Range

  • -20° to 100° C (-4° to 212° F)

UNF/UNC Connection

  • 9/16”-18 UNF Male (1/4” Male Nut, Fixed/Rotatable & 1/4” Union Nut, Rotatable)

Vibration

  • 0.35 mm (10-58 Hz) / 5 G (58.1-2,000 Hz) Per IEC 60068-2-6

Welded Connection

  • 1/4” Weld Stub
  • 1/4” Weld Stub, T-Connector

Wetted Materials

  • 2.4711 / UNS R30003 - Thin-Film Measuring Cell
  • 316L VIM/VAR - Process Connection

Applications

  • Gas panels for OEM tools
  • Semiconductor, flat panel display and photovoltaic industry
  • Special and bulk-gas supply