We manufacture the float switch that you need. It comes complete with the proper mounting bracket for a sump pump riser pipe. It is designed to be connected to a central station monitored alarm panel or independent alarm sounder. If connected to a central station you can also be notified of when your electricity is off too!
Visit our web site (www.wso.net/lpi) to find out more and where to purchase our product. This product sells for around $25 U.S. dollars and is extremely easy to install. Our distributors web sites are posted on our web site. Good Luck!