Stand-alone data logger with LCD display and external sensor for temperature and relative humidity measurements. Temperature range is -20° to 70°C (-4° to 158°F) and accuracy is ±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F). Relative Humidity range is 1% to 100% and accuracy is ±2.5%. The cable length for the external sensor is 6 feet. In addition to fixed interval logging, this logger supports burst logging and can report minimum, maximum, average, and standard deviation statistics.
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User manual: here