Confirm the exact configuration
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

Festo
The Festo part number 543872 is an industrial component utilizing a magnetic reed measuring principle with a contact-based, bipolar N.O. contact switching output. It operates within an ambient temperature range of -40 °C to 70 °C, supports an operating voltage range of 5 V to 30 V AC, and features oil-resistant materials with RoHS compliance. Certifications and markings include the RCM compliance mark, c UL us - Listed (OL), CE marking per EU EMC and RoHS directives, and UKCA marking per UK instructions for EMC and RoHS. Submit the exact part number, quantity, and application requirements for a quote.
Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Festo references — within one business day.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against Festo 543872. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.