Baumer Electric FHDK 10N1401 S35A Proximity Switch

Baumer FHDK 10N1401/S35A is a compact diffuse sensor with background suppression from Baumer’s FHDK family, designed for reliable proximity detection in automation lines. It operates on a 10–30 V DC supply and exposes an NPN output (S35A variant) via a four‑pin M8 connector, enabling straightforward integration into control systems. The sensor features a pulsed red LED (660 nm) for target illumination, a yellow output indicator, and an ultra‑compact housing with IP67 protection and an operating range of -25 to +65 °C, suitable for harsh workshop environments. Mechanically, the sensing distance is adjustable with a five‑turn dial, allowing tuning to specific target sizes, while the device’s dimensions are about 10.4 mm in width and 27 mm in length with a 14 mm depth, making it easy to mount in tight spaces. Typical performance includes a fast response time under 1 ms and built‑in short‑circuit protection, with the ability to detect targets within Tw roughly 20–120 mm and Tb up to 120 mm depending on operating conditions. This model is ideal for presence sensing on conveyors, part location in automated assemblies, and other applications requiring reliable background‑suppression detection in compact form factors.