Can anyone recommend a Hall effect transistor (non-latching preferably) that is more sensitive to magnet strength than an A3144? I'm using it to switch functions on an Arduino based project and because of other factors, the operating magnet has to be no thicker than 0.5mm. The existing range of neodymium magnets I have of that size operate the switch with a gap of up to 3mm, but I have to operate it at 4-5mm distance through 3mm thick resin. With the magnet up tight with the resin surface, operation of the switch is patchy and not reliable. Obviously the choices I have are to increase the transistor sensitivity or increase the magnet strength. The magnet strength option has proved to be a bust as I can't source anything more powerful than I have without increasing the magnet thickness. The second option is why I'm asking - is there a hall effect transistor that will operate at less than 35 to 70 gauss (the A3144 parameters).