HTL 2 & 4-Way Linear Hall Effect Finger Joysticks OTTO HTL Linear Hall Effect Finger Joysticks, available as 2-way or 4-way, provide the performance of a full-sized, dual-axis joystick in a miniature package that can be mounted in control handles, armrests, and panels. Programmable sensors with built-in temperature compensation ensure consistent and repeatable operation. The HTL joysticks offer excellent EMI immunity (up to 100V/M), tactile feel, and have either a dust-tight or IP68S watertight seal. A variety of outputs are available, as well as a wide range of button styles.