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The PCE-HT 71N Data logger detects air temperature and humidity and stores readings to its internal memory. This Data logger is compact and has enough memory to store up to 32,000 readings, 16,000 for each parameter, and is used above all as a data logger, in supermarket refrigeration units, refrigerated transport, warehouses and other temperature controlled environments. The device works as a data logger that records climatological data in spaces with controlled conditions. Data can be transfered to a computer via the USB port. Technical Spezification Measurement ranges: 0 to 100% r.h. / -40 to 70ºC Accuracy: ±3% r.h. / ±1°C Resolution: 0.1% r.h. / 0.1°C Sensors: internal (humidity and temperature) Memory: max. 32,000 readings (16,000 for each parameter) Measurement intervals: adjustable from 2, 5, 10 sec. up to 24h Start and stop date and time: programmable Alarm limit: adjustable Status indicator: via two LED LEDs (recording data / alarm) Interface: USB Software: included with the device Dew point temperature: calculated by the software once data has been transmitted (accuracy: ±2°C) Power: 3.6V lithium battery (life: approx. 1 year) Positioning: can be wall mounted or placed anywhere on a flat surface Operating conditions: -40 to 70°C / 0 to 100% r.h. Enclosure: ABS plastic Dimensions: 101.5 x 30mm Weight: 25g Delivery contents: 1 x PCE-HT 71N Data logger, 1 x mains adaptor, 1 x battery, 1 x software, user's manual