The Honeywell GAPS and HAPS Proximity Sensors are advanced inductive sensing devices that offer a three-state output to indicate target positions and identify detected faults. At the core of their electronic design is Honeywell proprietary FAVCO technology, which enhances their performance significantly.

The sensing mechanism utilized in the GAPS and HAPS Series closely resembles the industry-standard Eddy Current Killed Oscillator (ECKO) type proximity sensors. However, Honeywell has innovated this technology by incorporating patented FAVCO (Fixed Amplitude Variable Current Oscillator) technology. This feature enables continuous health monitoring of the sensor, allowing for the early detection of most circuit and sensor faults. Additionally, an optional third output state provides real-time feedback on the sensor's health, indicating whether it is functioning properly or has failed. This capability can reduce maintenance time, minimize flight delays, and lower overall maintenance costs throughout the lifespan of an aircraft.

Designed for resilience, these sensors can withstand extreme conditions, including high temperatures, intense vibrations, shocks, and electromagnetic interference (EMI/EMP). They are available in various housing and termination styles to suit different applications. The GAPS and HAPS sensors are ideally suited for demanding environments in the aerospace industry—monitoring landing gear positions, door and slide operations, and system monitoring—as well as in ordnance applications, such as projectile sensing and ammunition loading systems, and marine settings, including submarine hatch and door position monitoring and offshore equipment management.