Honeywell 942 Series Sensor: 2D-1G1-220S Model for Long-Range Metal Detection

Technical Specifications

Main Features and Advantages

Robust Construction and Environmental Protection: The Honeywell 942-M0A-2D-1G1-220S​ is built for longevity in tough industrial conditions. Its nickel-plated brass housing provides excellent resistance to corrosion, impacts, and mechanical wear. The IP67 rating signifies complete protection against dust and the ability to withstand temporary immersion in water up to 1 meter for 30 minutes, making it suitable for use in areas subject to splashing, washdown, or high humidity. This ruggedness ensures minimal downtime and maintenance, even in dirty or wet environments like food processing, automotive plants, or outdoor machinery.The 2-wire AC design of the Honeywell 942-M0A-2D-1G1-220S​ offers a significant installation and wiring advantage. It can be connected directly in series with an AC load (like a PLC input, relay coil, or pilot light) without requiring a separate DC power source or a third wire for output signaling. This simplifies panel design, reduces wiring complexity and cost, and makes it a direct, drop-in replacement for failing mechanical limit switches. The generous 15mm sensing range provides a reliable operating margin, accommodating potential machine misalignment or target wear. The sensor also features built-in protection against short-circuit and overload conditions, enhancing its durability. The embedded LED status indicator provides instant visual confirmation of the switching state (on when target detected), which is invaluable for rapid commissioning and troubleshooting. This combination of durability, simplified installation, and reliable performance makes the 942-M0A-2D-1G1-220S​ a highly cost-effective and dependable sensing solution.

Application Field

The Honeywell 942-M0A-2D-1G1-220S​ is a versatile sensor deployed across a wide spectrum of industrial automation and machinery applications where reliable, non-contact detection of metal objects is required. In automated manufacturing and assembly lines, it is commonly used for end-of-stroke detection on pneumatic and hydraulic cylinders, verifying the position of slides, clamps, and actuators. It ensures that a machine sequence only proceeds once a component is correctly in place, preventing collisions and jams. On conveyor systems, the sensor is ideal for part presence detection, counting, and sorting, where it can detect metal parts, pallets, or carriers as they pass a specific point, triggering subsequent actions like stopping a conveyor or activating a diverter.In material handling and packaging machinery, the Honeywell 942-M0A-2D-1G1-220S​ is used to detect the open/closed status of metal doors, gates, and guards for safety interlocking. Its robust IP67 housing makes it suitable for harsh environments such as woodworking, metal stamping, and machining centers, where it can operate reliably despite the presence of dust, chips, and coolants. Furthermore, in process industries, it can be employed to monitor the position of metal valves, dampers, or hatches. The sensor’s 220V AC operation makes it particularly convenient for integration into regions with standard AC control voltages and for direct interfacing with older relay-based control panels. Essentially, wherever a durable, wear-free alternative to a mechanical limit switch is needed to sense metal in an industrial setting, the Honeywell 942-M0A-2D-1G1-220S​ provides a superior solution.