The Global Logger IV Model GL400-7-1 is part of Global Water's line of rugged remote monitoring instrumentation. It features seven analog channels and one pulse channel for data recording. The Global Logger software operates on Microsoft's Windows, which helps make it easier to use. Remote monitoring sensors are connected to the GL400-7-1's internal terminal junctions. A wide variety of sensor types are used, with custom modifications offered upon request. Global Water Instrumentation Inc., Card No. 283