sling psychrometer

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sling psy·chrom·e·ter

wet and dry bulb thermometers mounted on a hand sling, for use when a small portable psychrometer is required.
References in periodicals archive ?
While the sling psychrometer certainly meets the spirit of the standards, each one of us spins the unit at our own pace--the variability determined by our enthusiasm or lack thereof.
Since we always car ry a thermohygrometer or sling psychrometer with us, we have ready access to temperature and humidity readings.
The reliable, old-fashioned, hand-operated sling psychrometer costs about $100 (the lazy-person's unit with a battery-operated fan costs about $50 more), and the newest type of device, the digital pen-style pocket hygrometer, costs about $50.