PMC Therm-ALERT is a very flexible and customizable sensing and alarm system intended to warn employees and management when temperature or dew point in working areas reach dangerous levels. The system comprises a high performance capacitive humidity sensor with temperature element, coupled to a display with one or more switch outputs to control functions such as warning lights. The display is mounted within a NEMA 1 enclosure for indoor use or NEMA 4 for outdoors. The sensors can be installed within the main enclosure or in separate remote enclosure with or without a secondary display. The system is fully configurable to user needs, including choice of sensors, enclosure, display and annunciators.