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Your cart is empty.Psychrometers measure relative humidity without agitation. To use, turn on the fan and let it run for 1-1/2 to 2 minutes. Then, subtract wet bulb reading from dry bulb reading and use the included slide rule and tables to calculate the RH. The fan is powered by three size D batteries (order separately). This operation, when compared to the conventional sling psychrometers, affords a safer, convenient, and more accurate method of RH determination.
Jacob Frame
Reviewed in the United States on October 12, 2023
Cole-Parmer, this product has soured me to your name brand. After installing the three D batteries and turned it on the fan was hitting the inside of the enclosure because it was not secured well by the sheet metal brackets. I had to add a zip tie to the bracket to tighten it up so that it wouldn't make an awful noise while in operation. The fan and motor is still loud.If you are going to charge a premium, please provide a product that does not feel like a cheap product.I hope it is accurate at least.
Jeffrey S Courtois
Reviewed in the United States on July 21, 2017
I am so glad that these are still being produced, there's nothing better to measure humidity than this!!!
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