I'm making a controller for my DI system and need to put some sort of level sensor in my DI reservoir.
My first thought was to use an optical sensor like one of these but the cable is only 45 cm long and the tubs are 22" (55 cm) deep and I'd prefer to avoid drilling a hole in the tub. I've thought of regular float switches, but I don't have a great way to secure them (I made the mistake of using a magnet once - using a magnet to secure a magnetic float sensor wasn't the brightest idea) and the edge/lip of the tub doesn't lend itself to hooking a clip over the edge. I could make a stand on the bottom of the tub but I need some sort of weight to hold it in place that won't contaminate or leach out into the DI water.
Does anyone have any ideas for an optical sensor with longer leads or for securing float sensors?
My first thought was to use an optical sensor like one of these but the cable is only 45 cm long and the tubs are 22" (55 cm) deep and I'd prefer to avoid drilling a hole in the tub. I've thought of regular float switches, but I don't have a great way to secure them (I made the mistake of using a magnet once - using a magnet to secure a magnetic float sensor wasn't the brightest idea) and the edge/lip of the tub doesn't lend itself to hooking a clip over the edge. I could make a stand on the bottom of the tub but I need some sort of weight to hold it in place that won't contaminate or leach out into the DI water.
Does anyone have any ideas for an optical sensor with longer leads or for securing float sensors?