WIKA Model PCA Compact pressure switch

Selection Notes

• Confirm your required pressure range and media type before selection
• Check whether explosion-proof enclosure (Ex d) is required for your site
• Choose contact configuration: SPDT or DPDT for single or dual circuit control
• Suitable for both liquid and gaseous media, including aggressive or contaminated fluids

Why Choose the WIKA PCA Compact Pressure Switch

• Mechanical Switching Without External Power: No supply voltage needed to switch electrical loads up to AC 250 V, 15 A directly — ideal for simple control circuits.
• Robust Flameproof Enclosure (Ex d): Aluminium alloy or stainless steel housing with IP66 / NEMA 4X protects in rough industrial environments.
• Wide Setting Range: Available from low to high pressures (starting from around 0.2 … 1.2 up to 1 000 bar, plus vacuum versions).
• Reliable Performance: Repeatability of set point ≤ 1 % of span with diaphragm + antagonist spring sensor design.
• Flexible Contact Options: Single set point with SPDT or DPDT options for single or dual circuit switching.
• Safety-Critical Applications: Can be supplied with SIL 2 or SIL 3 qualification for certain safety functions.

FAQ

Q: Does the PCA require a separate power supply for switching?
A: No — the PCA’s mechanical micro switch can directly switch electrical loads up to AC 250 V, 15 A without external power.

Q: Is the PCA suitable for aggressive or contaminated media?
A: Yes — the PCA is designed for gaseous and liquid, aggressive, highly viscous or contaminated media and aggressive ambient conditions.

Q: What enclosure protection does PCA have?
A: It features a robust flameproof Ex d enclosure with IP66 / NEMA 4X protection for harsh industrial environments.

Q: Can I use the PCA in hazardous areas?
A: Yes — Ex d enclosure makes it suitable for many hazardous locations; consult WIKA for specific certification needs (e.g., IECEx/ATEX).