Profile: Isaacs & Assocs., Inc. specializes in distribution of water. Our products include wireless 900MHz, wireless 802.11b, sensors, valves and Ag sprinklers. Our wireless 900MHz is a wireless systems well suited to most industrial layouts. Signals in this frequency range can pass through concrete, glass, wood and other materials. The signals reflect off metal surfaces, and often can find their way around obstacles. Our water sensor are used in detecting the presence of water without the need for external power. When water comes across the two external contacts, the normally closed internal relay opens.