The THPen is a portable, hand-held temperature-humidity pen that fits in the service technician’s shirt pocket. With its one-piece design, the PTH8708 combines accuracy and fast response with ease of use, says the company. The unit simultaneously displays temperature and humidity, and features minimum/maximum memory, data hold, selectable °F/°C, and auto power off. Temperature range is 14° to 122°F. Mannix Testing & Measurement, P.O. Box 866, Lynbrook, NY 11563; 516-887-7979; (Web site).