The 445815 from Extech Instruments, Waltham, MA, is a hygro-thermometer that provides audible and visual alarms for monitoring environmental conditions in laboratories, storage areas, manufacturing assembly areas, and other controlled environments. The device features a large-digit LCD, measures humidity from 10%–99% RH and temperature from 14°F to 140°F with ±4% RH and ±1.8°F accuracy, and can simultaneously display humidity, temperature, and dew point. A remote probe can clip onto the meter or extend on an 18 in. cable.
Humidity Alert Meter from Extech Instruments