Not very. Pressure switches are built to have either air or fluid activate the switch. So for you to make it a pressure switch you would have to waterproof the switch assembly on the laser pointer and then glue a tube over the on off switch. If you need a certain pressure to activate the switch you might have to make a diaphragm assembly over the switch before you mount the tube. Then you also might need a way of varying the pressure requirements that activate the on off switch.
Unless you were in a survival situation or MacGuyver shows, it would be far cheaper and easier to buy a pressure switch that also includes pertinent data that activates the switch and fluid flow and such.
Not very. Pressure switches are built to have either air or fluid activate the switch. So for you to make it a pressure switch you would have to waterproof the switch assembly on the laser pointer and then glue a tube over the on off switch. If you need a certain pressure to activate the switch you might have to make a diaphragm assembly over the switch before you mount the tube. Then you also might need a way of varying the pressure requirements that activate the on off switch.
Unless you were in a survival situation or MacGuyver shows, it would be far cheaper and easier to buy a pressure switch that also includes pertinent data that activates the switch and fluid flow and such.