The Binmaster BM-25 diaphragm switch's simple mechanism activates a sensitive micro-switch to indicate when material reaches the level of the switch in the bin. The pressure switch alerts when it senses high or low levels. Typically, it is wired to a light, horn or alarm panel. The switch has a silicone diaphragm and is enclosed in a nylon housing, designed to increase durability. There are models to mount internally or externally. Its corrosion-free polymer construction is perfect for ag cooperatives or any business storing dry bulk solids. It provides monitoring levels of material like corn, soy, wheat, milo, wood, plastic, crops, rice, powders, landscaping materials and aggressive chemicals like fertilizer pellets.