The Model PMT-2005 Precision Meteorological Thermometer is an aspirated complete precision ambient temperature measuring system with triple-shielded platinum resistance thermometer for outdoor or indoor test chamber applications. Temperature accuracy 0.06oC over 50oC range. Sensitivity 0.01oC. Zero hysteresis. CPU utilizing DSP technology performs continuous, automatic, and unattended ambient temperature measurements. 0-5Vdc analog and digital RS-232 interfaces. NIST traceable.