Honeywell FYFB4R7-2 Proximity Sensor

The Honeywell FYFB4R7-2 Proximity Sensor is a MicroSwitch proximity sensing device identified by the model FYFB4R7-2. It operates on a DC supply in the 9.6 to 36 VDC range, allowing compatibility with a broad spectrum of control circuits and panel wiring. As part of the Honeywell MicroSwitch family, the FYFB4R7-2 is designed for non-contact detection of nearby targets, enabling reliable sensing without physical engagement. The model designation helps technicians correctly identify and replace the sensor in installations that use Honeywell proximity technology, ensuring consistency across maintenance and wiring diagrams. This specificity—Honeywell, MicroSwitch, FYFB4R7-2, and 9.6–36 VDC—distinguishes it from other sensors and clarifies its use in projects that rely on Honeywell’s proximity sensing technology.