A miniature self-powered recorder for monitoring temperature and relative humidity conditions has an internal memory and long-life battery that allows it to collect up to a year's worth of time-based readings. The humidity sensor on the Spectrum 2000 from Veriteq Instruments Inc. is a thermoset polymer-based capacitive-type element with a rated five-year drift of less than 1.5% relative humidity. It has the capacity to monitor relative humidity from 0 to 100% and temperature from -40 to 160°F (-40 to 70°C).
May 2000, RS# 225
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