Industrial CS-21P-QD Magnetic Sensor

Industrial CS-21P-QD Magnetic Sensor by ADSENS Technology is a three‑wire, PNP normally‑open solid‑state magnetic switch designed for end‑of‑stroke sensing on round‑type and tie‑rod cylinders. The CS‑21P‑QD detects a magnetic field from a piston magnet and delivers a NO signal to PLCs or controllers, enabling contactless position sensing in automation lines. It operates on 5–30 V DC and can source up to 200 mA, with a maximum conduction drop of about 2.0 V, making it suitable for compact, fast switching in pneumatic applications. Weighing about 0.05 lb (roughly 23 g), this CS‑21P variant is part of the CS‑21 family, which includes CS‑21R, CS‑21N, CS‑21NE, CS‑21PE, and related models designed for mounting on round cylinders. The PNP NO output provides straightforward connection to digital inputs on controllers, and the sensor’s small footprint supports installation in tight spaces on machinery, robotics, and assembly lines. A round‑cylinder mounting clamp (PN) for CS‑21 and CS‑31 is available to simplify on‑cylinder installation, and distributors such as Radwell list the CS‑21P‑QD as a 5–30 VDC magnetic sensor with PNP normally open output.