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Model PCA Compact pressure switch

WIKA Model PCA Compact pressure switch

$120.00

The WIKA Model PCA is a compact pressure switch housed in a flameproof enclosure certified for Ex d hazardous areas. This robust safety device provides reliable pressure monitoring and switching functions in environments with explosive atmospheres. Designed for oil and gas, chemical processing, and other hazardous locations, it ensures safe operation where ignition risks must be controlled. The compact design allows for space-efficient installation while maintaining full compliance with international explosion protection standards. With its durable construction and precise switching capabilities, the PCA delivers dependable performance in critical safety applications where reliability is paramount.

Model PCA Data sheets

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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, highly viscous or contaminated media, also in aggressive ambience
  • For measuring points with limited space, e.g. control panel

Special Features

  • No power supply needed for switching of electrical loads
  • Robust switch enclosure from aluminium alloy or stainless steel with identical dimensions, IP66, NEMA 4X
  • Setting ranges from 0.2 … 1.2 to 200 … 1,000 bar, vacuum ranges
  • Repeatability of the set point ≤ 1% of span
  • 1 set point, SPDT or DPDT, high switching power up to AC 250 V, 15 A
Version

Compact pressure switch, flameproof enclosure Ex d
Special design feature

■ For oxygen, oil- and grease-free
■ Per NACE 1) MR0175 / ISO 15156, use in H₂S-containing environments in oil
and gas production
■ Per NACE 1) MR0103 / ISO 17945, metals resistant to sulphide stress cracking
■ Version compliant with EN 1854, pressure sensing devices for gas burners and
gas burning appliances
■ Drying of wetted parts
■ Offshore version
■ Tropical version (suitable for environments with increased air humidity)
■ Version for ammonia applications
■ Geothermal version
■ Assembled as a diaphragm seal system
Contact version

■ 1 x SPDT (single pole double throw)
■ 1 x DPDT (double pole double throw)
Microswitch with fixed dead band
The DPDT function is realised with 2 simultaneously triggering SPDT
microswitches.
Dielectric strength

Safety class I (IEC 61298-2: 2008)
Mounting

■ Direct mounting
■ Wall bracket from stainless steel
■ Mounting bracket for 2" pipe mounting
Setting range

-1…1000
Process connection Standard

■ ANSI/ASME B1.20.1
■ DIN EN ISO 228
Electrical connection Connection type

■ Female thread ½ NPT
■ Female thread M20 x 1.5
■ Female thread ¾ NPT
■ Cable gland non-armoured, nickel-plated brass
■ Cable gland non-armoured, stainless steel (AISI 304)
■ Cable gland armoured, nickel-plated brass
■ Cable gland armoured, stainless steel (AISI 304)
Electrical connection Wire cross-section

0.5 … 1.5 mm² (20 … 16 AWG)
For the grounding cable connection to the protective conductor use max.
2.5 mm² for the internal screw and max.4 mm² for the external screw.
Electrical connection Pin assignment

Connection details are given on the product label of the instrument. Connection terminals and the ground terminal are appropriately marked.
Approvals

EU declaration of conformity
IECEx

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