Amprobe TR100-A Temperature Data Logger with Digital Display Temperature meter with datalogging capability, used for HVAC, indoor air quality, and environmental applications Dual-scale thermometer has a silicon photodiode sensor and filter, and measures temperature in F and C Datalogging capability saves up to 16,000 data points, and RS232 port with software (included) exports data User-defined alarm limits, port to accept external temperature probe (not included), and 3-3/4 digit LCD display with a maximum reading of 1,999 Wall mountable, and Ingress Protection (IP)-65 rated for dust and moisture protection