Resistive thermal detector (RTD) dual-input meter measures temperature, and is used for HVAC, indoor air quality, and environmental applications * External, 100 ohms, platinum RTD temperature sensor measures temperature in F and C * Meets RTD standards Pt385, Pt3916, and Pt3926 * Displays minimum and maximum temperature with elapsed time, and average and relative temperature, and data hold saves readings for recording * Warning beeper with user-selectable high and low settings