For example, museums use the loggers to monitor humidity. Beer makers use them to watch the temperature of their batches. Drug makers use loggers to control storage temperatures for drugs and chemicals. Farmers use them to monitor soil conditions. Onset's 60 workers design, manufacture and sell loggers in a variety of shapes, all of them small.
Operators rely on personal computers to set the loggers then retrieve the information.
Connect the logger to his personal computer and set it to record the temperature every 15 minutes. Disconnect the logger and place it in the river. Retrieve the monitor after a month, connect it to the computer and read the temperatures. Onset's customers include Eastman Kodak, Anheuser Busch, Ben and Jerry's, Ocean Spray, Avon, Dow Chemical, General Motors, Harley Davidson, Raytheon, U.S. Navy Warfare, the Boston Museum of Fine Arts, the Monterey Bay Aquarium, and the Walt Disney Animal Kingdom. The New England Aquarium in Boston uses the loggers to help heal sick and injured marine animals, said Sue Knapp, the aquarium's publicist.