This is an all stainless steel three position float switch. It has a standard 3-5/8″ diameter six hole flange and a 1/4″ NPT thread connection. The floats are 1.43″ in diameter float has a 0.54 specific gravity which works great in lightweight liquids. A 70va SPST reed switch is used at each float position. This sensor can be used to control pumps or valves and the third float can be used as a high or low alarm or safety cutoff.