A water cooler kit is provided for use with an evaporative cooler of a type comprising at least one cooling pad, a water reservoir, a water inlet to supply water to the reservoir from a water supply at least one conduit for distributing water onto said at least one cooling pad, a fan for moving air through said cooling pad, and a pump for transferring water from said reservoir to said conduit. A predefined policy may include a restriction related to the group, as well as a measure of enforcement to initiate in the event of a violation of the restriction. The magnetic field sensor generates a signal indicating a magnetic field sensed by the sensor. Programmable input delay is provided between the data signal inputoutput pins and the data input terminals of the above-mentioned registers to help compensate for clock signal skew on the device. removing the liquid mixture from the reactor; ande.