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Mini Pressure Switch - PXS

Brand: WIKA Alexander Wiegand SE & Co. KG
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These high-quality mechanical pressure switches have been developed especially for safety-critical applications.

The great advantage of mechanical pressure switches is that no supply voltage is required for the switching process.
Features
  • Compact and slimline design
  • Robust switch enclosure from stainless steel 316, IP66, NEMA 4X
  • Wide selection of setting ranges available, 1 … 2.5 bar to 200 … 1,000 bar
  • Set point repeatability of ≤ 1 % for reliable switching
  • High switching power and large selection of contact variants and electrical connections
These high-quality mechanical pressure switches have been developed especially for safety-critical applications.

The great advantage of mechanical pressure switches is that no supply voltage is required for the switching process.
Features
  • Compact and slimline design
  • Robust switch enclosure from stainless steel 316, IP66, NEMA 4X
  • Wide selection of setting ranges available, 1 … 2.5 bar to 200 … 1,000 bar
  • Set point repeatability of ≤ 1 % for reliable switching
  • High switching power and large selection of contact variants and electrical connections
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Specifications

Brand

Version

  • Miniature Pressure switch
  • Option:
  • Version for hazardous areas (Ex ia)
  • Oxygen version (Cleaned for oxygen Service)
  • NACE compliant per MR-0175, ISO 15156 and MR-0103
  • Drying of Wetted Parts
  • Offshore Version
  • Tropical version (Suitable for environments with increased Air humidity)
  • Geothermal Version
  • Version for ammonia applications

Set Point Repeatability

  • ≤ 1 % of end of setting Range

Ignition Protection Type (Option)

  • Ex ia I Ma (Mines)
  • Ex ia IIC T6/T4 1) Ga (Gas)
  • Ex ia IIIC T85/T135 1) Da IP66 (Dust)

Safety-Related Maximum Values (Only for Ex Ia Version)

  • Current li: 100 mA Internal inductance Li, 0 mH
  • Power Pi 0.75 W
  • Voltage Ui: DC 30 V Internal capacitance Ci, 0 μF

Contact Version

  • The DPDT function is Realised with 2 simultaneously triggering SPDT micro switches. See table on next page for available Contact versions.
  • 1 x DPDT (Double Pole Double Throw)
  • 1 x SPDT (Single Pole Double Throw)

Electrical Connection

  • Threaded Connection with Connection cable Material of Threaded Connection: Stainless Steel 316
  • Threaded Connections: - 1/2” NPT Male - M20 x 1.5 Male via Adapter - 1/2” NPT Female, 3/4” NPT via Adapter
  • Connection cable: - Length: 1.5 m, 3 m, 5 m (Other lengths on Request) - Cable sheath material: Silicone - Wire cross-section: 0.5 mm² (20 AWG)
  • Terminal Box: - Aluminium Alloy, Copper-Free, epoxy Resin Coated - 3 x 1/2” NPT Female - Ingress Protection IP65

Dielectric Strength

  • Safety ClassI (IEC 61298-2: 2008)

Process Connection

  • 1/4” NPT Female (Standard)
  • 1/2” NPT, G 1/4 Female via Adapter
  • M20 x 1.5 Male via Adapter
  • Further threaded Connections and open Connecting flanges on Request
  • 1/2” NPT, G 1/2 A, G 1/4 A Male via Adapter

Permissible Temperature

  • Medium: Depending on Sensor Element and Sealing, see tables on next page
  • Ambient: -40° to +85° C for Non-Ex Versions.
  • For Version Ex ia, see Operating instructions.

Switch Enclosure

  • Tamper-proof due to access cover plate with lead Seal option
  • Laser-engraved product label from Stainless Steel
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Applications

  • Pressure monitoring and control of processes
  • Safety-critical applications in general process instrumentation, especially in the chemical and petrochemical industries, oil and gas industries, power generation incl. nuclear power plants, water/wastewater industries, mining
  • For gaseous and liquid, aggressive and highly viscous or contaminated media, also in aggressive environments
  • For measuring locations with limited space, e.g. control panels
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Documentation

Data Sheet

Operating Instructions

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