Wika Model PCA Compact Pressure Switch Ex d

The model PCA pressure switch is extremely robust and guarantees optimal operating characteristics. For safety applications, the pressure switch is optionally available in a SIL 2 qualified or a SIL 3 qualified version.

The robust switch enclosure from aluminium alloy or stainless steel 316 can withstand the rough and corrosive operating conditions of the process industry with working ranges of up to 1,000 bar. To adjust the set point simply open the access cover plate. The access to the terminal block for the electrical connection is protected by a screw-on lid, which is secured with a screw-type lock against unauthorised intervention.

A micro switch integrated in the instrument enables the direct switching of an electrical load of up to AC 250 V, 15 A.

Special features

■ No supply voltage needed for the 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

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 environments 

■ For measuring locations with limited space, e.g. control panels

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