Turck FCS-N1 2A4P-ARX-B3151 Flow Sensor Module

Turck FCS-N1 2A4P-ARX-B3151 is an inline immersion flow monitoring sensor designed for continuous liquid-flow verification in industrial automation and process-control applications. It uses calorimetric (thermal dispersion) sensing to measure flow in liquid media (water and compatible fluids), with a typical water range of 1–150 cm/s and an oil range of 3–300 cm/s, making it suitable for cooling circuits, lubrication systems, hydraulic units, chemical dosing, and general inline flow protection. The device operates on 98–132 VAC and provides a relay output (NO contact) with an electrical connection that can be 1/2" NPT or an industrial connector depending on variant, and it features an immersion probe with an integrated processor. Construction includes IP67 protection, a PBT housing, and a stainless steel sensor body (1.4571 / 316Ti); it tolerates -20 to +80°C, with an approximate response time of 2–15 seconds (application dependent) and an adjustment potentiometer with LED status indication. Inline insertion mounting supports straightforward installation in existing pipelines, and the part number is TURCK FCS-N1 2A4P-ARX-B3151 for reference in maintenance or replacements.